Wheat

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Variation Characteristics and Impact of Climate Factors During Winter Wheat Growth in Kashgar, Xinjiang

Chinese Agricultural Science Bulletin 2016, 32 (27): 34-41. DOI: 10.11924/j.issn.1000-6850.casb16010061

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The study aims to provide references for crop production in winter wheat area of Kashgar. The data of temperature, precipitation, sunshine duration from 1981 to 2014 during the growth period of winter wheat in Kashgar was used to study the variation characteristics of climate factors and their effects on winter wheat growth and development by the climate statistical method. The results indicated that the annual average temperature change during winter wheat growth in Kashgar showed an increasing trend. The precipitation showed a decreasing trend in the first two months after winter (March and April), and an obviously increasing trend in the rest time. Meanwhile, the effective accumulative temperature and the sunshine duration showed an increasing trend. Each development stage of winter wheat was ahead of schedule in different degrees during recent 34 years, especially the early stage and the jointing stage, but the overwintering stage showed a trend of delay. The temperature, effective accumulative temperature and the sunshine duration were negatively correlated with each development stage of the winter wheat. In short, the main reason for the advance of winter wheat growth period was the increase of temperature, effective accumulative temperature and sunshine duration. The impact of climate warming on winter wheat growth was significant in Kashgar.

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Genetic Diversity Analysis of Wheat Aphids Resistant Wheat Varieties by Simple Sequence Repeat (SSR) Markers

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Journal of Agriculture 2011, 1 (2): 5-10. DOI: 10.11924/j.issn.2095-4050.2011-xb0181

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In order to gain knowledge of genetic diversity of wheat varieties/lines resistance to wheat aphids, on the basis of field insect plot appraisal, 47 wheat varieties/lines with different degrees of resistance to wheat aphids were studied by 18 SSR markers to explore genetic diversity of wheat aphids. 18 SSR markers were screened and a total of 99 allelic variants were detected in 47 wheat varieties ranged from 1 to 10 alleles per marker with an average of 5.21. The mean of alleles of high resistance insect (HR) wheat varieties were 3.83, of resistance insect (R) wheat varieties were 3.88, of sense insect (S) wheat varieties were 4.06 and of high sense insect (HS) wheat varieties were 3.56. The PIC (Polymorphism information contents, PIC) for each polymorphic primer varied from 0 to 0.91 with an average of 0.64. PIC of the HR wheat varieties were an average of 0.60 (0-0.97), of the R wheat varieties were an average of 0.64 (0-0.99), of the S wheat varieties were an average of 0.64 (0.14-0.85) and of the HS wheat varieties were an average of 0.67 (0-0.81). The mean genetic distance (GD) between 47 varieties was 0.65 varied from 0.33 to 0.94. The GD between HR variety was 0.59 varied from 0.39 to 0.77; The GD between R variety was 0.62 varied from 0.39 to 0.83. The GD between S varieties was 0.62, varied from 0.37 to 0.83. The GD between HS variety was 0.64, varied from 0.37 to 0.84. Based on 0.67 of GD, 47 varieties were clustered into seven groups. Resistant insect wheat variety ‘Linyuan 95-5322’ was a groups by oneself. It was explained that there was a further genetic relationship between ‘Linyuan 95-5322’ and other variety, and ‘Linyuan 95-5322’ could be used to resistant insect parent.

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The Composition and Polymorphism Analysis of Glu-1 Subunits of Wheat Varieties and Their Parents in Shandong Province after Liberation

Wang Jiangchun, Li Yunpeng, Wang Xufang, Yin Yan, Xin Qingguo, Jiang Hongming,Li Linzhi, Wang Honggang

Chinese Agricultural Science Bulletin 2008, 24 (5): 0-null. DOI: 10.11924/j.issn.1000-6850.20085725

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The aim of this paper was to study the composition and polymorphism of Glu-1 Subunits of wheat varieties that selected from liberation to now in Shandong province and select breeding material to improve wheat quality. The Composition and Polymorphism of Glu-1 Subunits were analyzed by SDS-PAGE. The results showed that “null” and “7+9” were the predominant allele variation patterns on Glu-A1 loci. Five allele variation patterns, “7+8”, “7+9”, “14+15”, “17+18” and “6+8” were detected on Glu-B1 loci, but the predominant patterns were “7+8” and “7+9”. Six allele variation patterns, “2+12”, “2+10”, “5+10”, “4+10”, “4+12” and “2+11” were detected on Glu-D1 loci, but the predominant pattern was “2+12”. In those three loci, Glu-B1 loci had the highest polymorphic frequency, Glu-D1 loci was second, and the last was Glu-A1. The polymorphism index of Glu-1 decreased gradually from 1950’ and reached to the lowest point in 1960’. After that the polymorphism index of Glu-1 increased slowly and got the highest point in 1990’. But the index showed decrease from 1990’ to now. The frequencies of the high quality subunits were low in wheat variety and its parent in Shandong province. This could be a way to improve wheat quality of Shandong province.

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Characteristics of New Wheat Variety‘Yannong 173’with High Yield, Multi-resistance and Wide Adaptability

Chinese Agricultural Science Bulletin 2019, 35 (1): 1-5. DOI: 10.11924/j.issn.1000-6850.casb17110104

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According to the regional and production test in Shandong Province during 2012- 2015, the differences of yield, yield components, quality and other aspects between ‘Yannong173’ and the control ‘Jimai 22’are analyzed. Methods of high stability coefficient (HSC) and coefficient of variation (CV) are used to determine the high and stable yield of‘Yannong173’. The results showed that the average yield of the variety was 8894.6 kg/hm2 in the tests, 5.68% more than that of the control, the difference was significant. The mean values of its high stability coefficient (HSC) and coefficient of variation (CV) of was 11.08 and 7.33, respectively, lower than the mean value (16.22 and 7.74) of the control, showing high and stable yield duality. Its grain was cutinization, had good commodity and good medium gluten quality.‘Yannong 173’has the advantages of high and stable yield, strong resistance and wide adaptability, and was a new wheat variety with wide application prospects.

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Analysis of Yield and Quality Traits for Wheat Varieties in Shanxi Province

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Journal of Agriculture 2012, 2 (5): 5-10. DOI: 10.11924/j.issn.2095-4050.2011-xb0890

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To sum up the experience of wheat breeding provide scientific basis for breeding new varieties with high quality and high yield and multiple resistance and increase level of wheat production. Using intuitive statistical method, it is analyzed in this that the yield and the quality traits of regional test for 82 wheat-varieties by authorized from Shanxi province, 2001-2010. The results showed that is not enough genetic background and lack genetic difference among varieties. There were large difference of total yield between different wheat varieties. The change range of yield for 82wheat varieties from 2774.0kg/hm2 to 7365.0kg/hm2, with the average value of 5375.1kg/hm2, increased by 7.9%, with contrast. Among which the change range of yield for water-land wheat varieties from 5329.5kg/hm2 to 7365.0kg/hm2, with the average value of 6159.5kg/hm2. The change range of yield for dry-land wheat varieties from 2774.0kg/hm2 to 5885.0kg/hm2, with the average value of 4084.7kg/hm2. The change range of protein content for 82 wheat-varieties from 11.7% to 18.0%, with the average value of 14.7%. Among which the change range of protein content for water-land wheat varieties from 12.8% to 18.0%, with the average value of 15.0%. The change range of protein content for dry-land wheat varieties from 11.7% to 17.0%, with the average value of 14.7%. The change range of wet gluten for 82 wheat-varieties from 23.6 to 45.5, with the average value of 32.3. Among which the change range of wet gluten for water-land wheat varieties from 26.1 to 45.5, with the average value of 32.3. The change range of wet gluten for dry-land wheat varieties from 23.6 to 39.8, with the average value of 32.3. The change range of sedimentation value for 82 wheat-varieties from 11.1 ml to 71.4ml, with the average value of 33.9ml. Among which the change range of sedimentation value for water-land wheat varieties from 15.5ml to 71.4ml, with the average value of 32.0ml. The change range of sedimentation value for dry-land wheat varieties from 11.1 ml to 63.5ml, with the average value of 35.8ml. The study of wheat breeding have acquired larger evolution in Shanxi province in ten-year. Level of variety yield is steadily improved. Main quality traits target is above the national average value. The innovation study of wheat germ plasm with excellent agronomic trait and genetic diversity was enforced in wheat breeding procedure for the future, in order for breeding breakthrough variety to establish abundant material base.

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Wheat Varieties Evaluation in South Huai River Wheat Region in Jiangsu Province

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Journal of Agriculture 2012, 2 (5): 11-16. DOI: 10.11924/j.issn.2095-4050.2011-xb0981

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In order to understand the adaption of the varieties to the environment of South Huai River Wheat Region in Jiangsu Province, three varieties include Huaimai22, Yannong19 and Zhen9023 from North Huai River Wheat Region and six varieties include Yangmai15, Yangmai16, Yangmai13, Yangmai11, Ningmai13 and Zhengmai166 from South Huai River Wheat Region were evaluated in 2011 in Yangzhou. The results indicated that the most adaptive sow date is Oct 28th for all the varieties and Yangmai11 and Yangmai16 have the better performance among the tested varieties. They have bigger spikes, more seeds, higher kernel weights and higher resistance to major diseases.

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Correlation of Dough Stickiness with Main Wheat Quality Parameters

Zhang Huawen, Tian Jichun, Liu Yanling

Chinese Agricultural Science Bulletin 2005, 21 (2): 69-69. DOI: 10.11924/j.issn.1000-6850.050269

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Thirty-two different wheat varieties were used to measure dough stickiness, protein content, gluten index and dough rheological properties. The relation between dough stickiness and main wheat quality parameters was determined by the correlation analysis. The results are as follows：First, dough stickiness properties were remarkable correlated with many flour quality parameters, so dough stickiness properties can be used to evaluate wheat flour. Second, wheat dough stickiness were significant negative correlated with some quality that indicate dough strength quality index of intensity, indicate that wheat dough stickiness properties with wheat gluten strength intensity of dough and the resist intensity of dough be rubbing and mixing have remarkable negative correlation, so if reduce the stickiness of the dough, can improve the strength of gluten, the gluten quality, the resisting ability of rubbing and mixing.

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Analysis on Genetic Diversity of Wheat Varieties with Resistance to Wheat Midge (Sitodiplosis mosellana)

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Journal of Agriculture 2011, 1 (xb1): 10-16. DOI: 10.11924/j.issn.2095-4050.2011-xb0078

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In order to gain the knowledge of genetic diversity of wheat varieties with resistance to wheat midge (Sitodiplosis mosellana), on the basis of field insect plot appraisal, 47 wheat varieties/lines were involved by 19 SSR markers to explore their genetic diversity. The 19 SSR markers were screened and a total of 104 allelic variants were detected in 47 wheat varieties. Three to eight alleles per marker were detected, with an average of 5.47. The means of alleles of high resistant, moderate resistant, sensitive and high sensitive varieties were 4.11, 4.68, 3.95 and 3.84, respectively. The PIC (polymorphism information content) for each polymorphic primer was varied from 0.35 to 0.86 with an average of 0.74. The PICs of high resistant, moderate, sensitive and high sensitive varieties had an average of 0.64 (0.31~0.81), 0.69 (0.38~0.88), 0.67 (0.40~0.80) and 0.67 (0.20~0.89), respectively. The genetic distance (GD) of 47 varieties was ranged from 0.40 to 0.95, with an average of 0.71. The GDs of high resistant, moderate resistant and high sensitive varieties were varied from 0.40 to 0.95, from 0.46 to 0.90 and from 0.41 to 0.90, with an average of 0.66, 0.69 and 0.68. Based on cluster analysis results, the 47 varieties were clustered into six groups. Resistant variety Jinmai 65 was a group by oneself, indicating that there was a farther genetic relationship between Jinmai 65 and other varieties, and so the Jinmai 65 might be used as resistant parent and might be popularized in production.

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Comparison and Path Analysis of Agronomic Characters of Wheat Lines in Regional Trial in Southern Shanxi Province

任文斌,谢三刚,王倩,吴翠翠,赵智勇,柴永峰 and 李秀绒

Journal of Agriculture 2016, 6 (2): 22-26. DOI: 10.11923/j.issn.2095-4050.cjas15070016

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In order to understand the development trend of irrigated wheat breeding in southern Shanxi Province, agronomic characters of 41 wheat lines in regional trial in southern Shanxi from 2012 to 2014 were analyzed by comparison analysis, correlation analysis and path analysis methods. The results showed that the coefficient of variation of spike length was the highest, 9.61%. The variation coefficient of three factors of yield showed the number of effective spikes>1000-grain weight>grains per spike. Multiple comparative analysis showed that there were extremely significant differences in yield among the years, but T test of the agronomic characters between the trial wheat lines and CK had no significant difference. The correlation analysis showed that the yield was extremely and significantly positive correlated with the basic seedling, the number of effective spikes and growth period, and was significantly positive correlated with grains per spike. Path analysis showed that the number of effective spikes, grains per spike and 1000- grain weight had a greater direct contribution to the yield, and grain number per spike was the largest contributor in the comprehensive effect. According to the analysis results and ecological conditions in southern Shanxi Province, grain number per spike was the main factor affecting the wheat yield. The wheat line which had more grain number per spike and stable improvement of 1000- grain weight should be the breakthrough point in wheat breeding process of southern Shanxi.

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The Development of Identification for the Genes of Pre-harvest Sprouting of Wheat Using Comparative Molecular Genetics

Yang Zefeng, Zhang Feng, Gu Shiliang, Li Tao, Xu Chen-wu

Chinese Agricultural Science Bulletin 2004, 20 (5): 50-50. DOI: 10.11924/j.issn.1000-6850.040550

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Using the molecular genetics information from model crops as the foundation of the complicated organism genomes is the regular method for modern molecular genetics. We have introduced the developments of the seed sprouting of some model organism, such as arabidopsis, maize and rice. We also summarized the molecular genetic researches of pre-harvest sprouting for wheat. And then we analyzed that it is feasible to use ABI3 gene from arabidopsis and Vp-1 gene from maize as the candidate genes of pre-harvest sprouting in wheat using method of comparative molecular genetics. This analysis was based on the colinearity of the genomes between wheat and some model organisms.

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Study on a Stripe Resistance Gene and its Molecular Marker in Wheat ICA31 from Syria

Pu Zongjun,, Yang Wuyun, Yan Zehong, Zheng Youliang, Zhang Zengyan

Chinese Agricultural Science Bulletin 2006, 22 (2): 65-65. DOI: 10.11924/j.issn.1000-6850.060265

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Inheritance analysis showed that the wheat line ICA31 carries a single dominant gene conferring high resistance to stripe rust isolates CYR30，CYR31 and CYR32. Through allelic test, the resistance gene was different from Yr5, Yr10 and Yr15. By pedigree analysis, the resistance gene in ICA31 derived from the Syria common wheat line Xu18. Results of the SSR marker and BSA analysis showed that the resistance gene was located on 1BS and a diagnostic marker WMS11-193bp for the gene was identified. The genetic distance from the resistance gene to WMS11-193bp was 2.1 cM. The work is valuable for molecular-assisted selection in wheat breeding program against stripe rust.

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Studies on Main Characters of A New Wheat Variety Shaan 253 with Strong Gluten and Good quality

Pang Hongxi, Pei Awei, Wang Yi, Li Shuobi

Chinese Agricultural Science Bulletin 2004, 20 (6): 106-106. DOI: 10.11924/j.issn.1000-6850.0406106

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This paper gives the results of kernel yield and main agronomic characters about a new wheat variety Shaan253 with high kernel yield and strong gluten, which come from the Shaanxi Regional Tests, the Shaanxi Productive Test, the National United Identification Test and several comparing trails among varieties, etc. The results show: Shaan253 possesses multiple good agronomic characters, such as growing vitality , robust plant ,mid-short straw ,compact plant-type, upward leave and earlier maturity, wide regional adaptation, etc. It also holds over mid-resistance to several main wheat diseases, such as stripe rust , powder mildew and leaves blight . It also has good quality characters, such as high gluten content, longer development time and longer stability time. Farther more, it has high kernel yield potential in known good quality cultivars, such as Xiaoyan6 , Shaanyou225,Gaoyou 503,etc. Its yield potential is over 7500 kg／hm2, and it is easy to get more than 6750 kg／hm2 in commercial production. Under tests condition, its average yield is same as that of the contrast variety Shaan229 . All in all, Shann253 has good prospects in good quality wheat commercial production.

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Preliminary Results of Wheat Growth and Yield in Apricot and Wheat Intercropping

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Chinese Agricultural Science Bulletin 2012, 28 (15): 97-101. DOI: 10.11924/j.issn.1000-6850.2011-2672

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In order to explore apricot wheat intercropping of wheat growth and yield of structural characteristics, wheat intercropping in apricot, apricot base point to the middle of two rows of apricot trees from near and far were divided into three areas (under the crown area, near crown area, crown zone far), we studied the wheat growth and yield of structural characteristics in three areas. Select ‘Xindong 20’ as material, the changes of wheat ears, dry matter accumulation, leaf area index, grain filling, yield components in apricot wheat intercropping were studied. The results showed that, tin wheat ears were faster than the intercropping system. In the intercropping system, the distance closer apricot, wheat and dry matter accumulation were lower the strength. Single-leaf area index for field was higher than the intercropping system. Single-filling rate was greater than the average for field intercropping system. Grains per spike and yield showed a single field for more than intercropping system, the highest one for field production, intercropping system for field average yield than the single-cut 49.72%. In the intercropping system, grain weight and spike number showed as far as the highest area > near crown area > under the district crown. Results indicated that, the apricot wheat intercropping system for wheat growth and development was not as a single field, resulting in lower wheat production in varying degrees.

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Effect of Per-winter Positive Accumulated Temperature on Suitable Planting Dates of Winter Wheat in South Centre Area of Hebei

Cui Yansheng, Han Jiangwei, Cao Gang ,Meng Jian, Zhang Jinwen

Chinese Agricultural Science Bulletin 2008, 24 (7): 195-198. DOI: 10.11924/j.issn.1000-6850.20086024

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Based on per-winter positive accumulated temperature in three regions of Huang-Huai Winter Wheat Area and Baoding of northern winter wheat area during 1997-2006, the suitable planting dates of winter wheat were preliminarily studied. The results showed that the suitable planting dates of different regions were as follows: Handan was between October 8 and October 18; Shijiazhuang was between October 5 and October 15; Hengshui was between October 2 and October 12; Baoding was between October 1 and October 11. As a result, it is considered that the suitable painting dates of winter wheat are between October 5 and October 12 in the north area of Huang-Huai winter wheat area，and between October 1 and October 11 in the south area of northern winter wheat area.

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Comparative Analysis of Winter Wheat Yield Estimation Model Based on SAR

Chen Lei,Fan Wei,Chen Juan,Xun Shangpei,He Binfang,Zhang Hongqun and Ren Zhu

Chinese Agricultural Science Bulletin 2015, 31 (10): 256-260. DOI: 10.11924/j.issn.1000-6850.casb14110161

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The study aims to inform agriculture administrators of winter wheat yield in advance, thus formulate food production form and relevant policy. Experimental fields of winter wheat yield data in May before harvest, and the synthetic aperture radar(SAR) double polarized—RDARSAT-2 that were photographed in April and May in Shouxian and Huaiyuan County in Huaihe River Region were adopted for winter wheat yield estimating. The liner yield estimating models were established by adopting backscattering coefficient and experimental fields yield. Then precision of yield estimating models of 2013 and 2014 were compared. Yield estimating models established by co-polarized (HH) and cross-polarized (HV) were adopted for winter yield estimating in Shouxian County, their precision were 68.37% and 74.01%, respectively, and their precision were 63.10% and 69.10% in Huaiyuan County, respectively. Yield difference of winter wheat in the lodging region was analyzed in detail. The precision of yield estimating model based on cross-polarized (HV) was higher than that based on co-polarized (HH). Finally, the four polarized SAR image would be chosen for yield estimating according to different winter wheat growth patterns. The results of this model analysis could form the research base and gather experience for parameter correction and popularizing of winter wheat yield models.

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High Molecular Weight Glutenin Subunits Variations and Expressions in Synthesized Polyploid Wheat and It’s Progentiors

Yang Lin, Li Xia, Liu Dengcai

Chinese Agricultural Science Bulletin 2006, 22 (4): 44-44. DOI: 10.11924/j.issn.1000-6850.060444

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Four accessions of Ae. tauschii and 5 synthesized polyploid wheat which derived from Ae. tauschii and Ae. tauschii with Triticum turgidum were analyzed using SDS-PAGE method. Four allelic variations were detected in 4 Ae. tauschii. All of the HMW-GS in the synthesized polyploid wheat was the same as their parents and at the end expressed. Of this paper, we discussed the utilization strategies for the Ae. tauschii genes.

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Discussion on the Progress and Strategiesof Dryland Wheat Breeding in Shanxi Province

Journal of Agriculture 2015, 5 (9): 17-21. DOI: 10.11923/j.issn.2095-4050.cjas15030006

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Shanxi is a typical arid province in north wheat area, it has the bigger area for dryland wheat, and the production of dryland wheat plays a important role for wheat production in Shanxi Province. In order to breed wheat varity with drought resistance, productivity, high-yield stability and adaptability, the recent progresses of wheat production and development in Shanxi and Shanxi dryland wheat breeding including team building, breeding methods and breeding achievements were reviewed. In addition, the problems about the dryland wheat breeding in the current production conditions were analyzed and breeding strategies and suggestions including breeding target, germplasm innovation and breeding methods were discussed.

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Study on the Contribution Sequence of Different Cultural Factors Related to Wheat Yieldin Spring Low Temperature Years

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Journal of Agriculture 2011, 1 (3): 13-17. DOI: 10.11924/j.issn.2095-4050.2011-xb0311

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In order to effectively improve frost resistance to spring low temperature of winter wheat, we studied the contribution sequence of different cultural factors related to yield of winter wheat in spring low temperature years by uniform experiment design, stepwise regression and general contribution method. The results showed that, the influence order of different cultural factors on yield was: base phosphorus(P2O5) quantity＞pure nitrogen quantity topdressing at rising stage＞base pure nitrogen quantity＞plant density or irrigation quantity before sowing＞irrigation quantity at rising stage＞base potash(K2O)＞irrigation quantity at filling stage or interval days between irrigation time at filling stage and maturity ; the contribution of coupling factors existing positive interaction effect were also listed in an descending sequence as: plant density and irrigation quantity before sowing＞base pure nitrogen quantity and pure nitrogen quantity topdressing at rising stage＞pure nitrogen quantity topdressing at rising stage and irrigation quantity＞irrigation quantity at filling stage or interval days between irrigation time at filling stage and maturity ; there was negative interaction effect between base pure nitrogen quantity and base pure potash(K2O) and it cleared the best combination of the different cultural factors for the highest yield (3692.34 kg/hm2). The study has provided theoretical and technical support for achieving high yield in spring low temperature years.

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A Determination Method of Grain Number of a Spike of Wheat

Journal of Agriculture 2015, 5 (9): 27-30. DOI: 10.11923/j.issn.2095-4050.cjas15020016

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[Objective][Method]The study aimed at accurately determining grain number of a spike of wheat in order to provide better technical support to accurately establish technique scheme and summarize experience for high yield, and it was explored by field test. [Result] The results showed that, new method could improve 4 times sample rate, and enhance data accuracy compared to traditional method. Its concrete steps included: in measured wheat field, We selected representative multiple sampling points, and took continuous spike(≥100 number)in every sample point(1m2), and recorded related contents placing in mesh nylon bag；Dried sample and weighed grain, and randomly selected ≥3 portions as repeat number of grain number of a spike; Calculated total grain numbers of sample by sample weight and weight of number every repeat, and sample total grain numbers divided by sample spike numbers obtained grain number of a spike of every repeat; The mean of grain number of a spike of all repeats was grain number of a spike of every sample; The mean of grain number of a spike of all samples was grain number of a spike of sampled wheat. [Conclusion]The new determination method effectively improved sample rate, and more accurately reflected grain number of a spike of wheat in different field. It could effectively reduce error due to heredity, cultivation and environment factors compared to traditional method.

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Study on Meteorological Degree Forecast Model of the Main Pests and Diseases of Winter Wheat in Shanxi

Wang Zhiwei1, Zhang Dongxia2, Ma Yali1, Ban Shenglin1

Chinese Agricultural Science Bulletin 2010, 26 (11): 267-271. DOI: 10.11924/j.issn.1000-6850.2009-2751

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Meteorological conditions were the main influence factors of pests and diseases of winter wheat, and were closely related to the developmental stages of crops. Especially in the special year, if the influence factors selected by model had more obvious changes than normal years, the differences between the forecast results and the actual results was big, so the forecast model had some limitations. In order to enhance the practicality of forecasting mathematical statistics, historical data for many years should be used and predict methods should be used as many as possible in practice to access to higher forecast accuracy rate. In this paper, the meteorological conditions forecast index of the main pests and diseases of winter wheat (powdery mildew, stripe rust, wheat spider) were analyzed, the meteorological degree forecast model of the main pests and diseases of winter wheat was set up. Through the back testing with the historical data, the rate of backtracking and fitting for the forecast model was above 90%. In a word, the model set up by this method was applied to do the meteorological forecast of the main pests and diseases(stripe rust, powdery mildew, wheat spider) of winter wheat in general years in Shanxi. Key words: Shanxi province; winter wheat; insect pests and diseases; meteorological conditions; forecast model

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