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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (16): 182-189.doi: 10.11924/j.issn.1000-6850.casb15010049

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Analysis of the Influencing Factors on Disease Occurrence of Jujube Black Spot and Field Efficacy Test

Ma Rong1,2, Liu Xiaolin1, Liang Yingmei3, Yan Jun4, Chen Baojun4, Zhao Jingling5, Zhang Tao2   

  1. (1College of Forestry and Horticulture, Xinjiang Agricultural University, Urumqi 830052;2The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083; 3Museum of Beijing Forestry University, Beijing 100083;4Hetian Region Forestry Bureau, Hetian Xinjiang 848000;5Aksu Horticulture Management Office, Aksu Xinjiang 843300)
  • Received:2015-01-09 Revised:2015-05-22 Accepted:2015-03-25 Online:2015-07-27 Published:2015-07-27

Abstract: The purpose of this project was to confirm the related factors that affecting the jujube fruit black spot and the field control effect. The related factors which disease occured were investigated in Hetian and Aksu area of Xinjiang by sampling in five locations. At the same time, field control experiment with 7 kinds of fungicide by randomized block was conducted. The results showed that the disease occurrence of ‘Junzao’ (32.79%) and ‘Hupingzao’ (30.73%) were heavier, and that of ‘Huizao’(4.37%) was lighter. Disease occurrence in 3-year jujube orchard was 3.01%. Disease occurrence was positively related with the tree age in 5~12 years orchard. There was a higher occurrence of disease in jujube orchard with intercropping. Basically, the same disease situation was found in jujube orchards with cultivation densities as 1.5 m× 2 m, 1.5 m × 3 m, 1.5 m× 4 m and 1 m× 1 m× 2 m. The severity of the disease occurrence was different in direction, the order was: south> west> east> north. Disease occurrence in loam (32.71%) was significantly higher than that in sand soil (21.68%); disease occurrence under flood irrigation (37.18%) was significantly higher than that under drip irrigation (26.62%), disease occurrence under refine management (30.57%) significantly lower than that under the extensive management (43.49%). The control efficacy of 60% pyraclostrobin · metiram (5% pyraclostrobin · 55% metiram) WG applied at 1500 times and 3000 times against jujube black spot in the filed was 90.5% and 82.7%; the control efficacy of 3% polyoxin WP applied at 200 times against jujube black spot in the filed was 90.25%. Research results provide theoretical basis for scientific treatment and comprehensive prevention and control of jujube black spot.