Study on Isolation and Screening of Plant-growth Promoting Rhizobacteria and 
its Biocontrol Acion to Soil-borne Diseases of Cucumber

Abstract

Abstract: A study on screening of plant-growth promoting rhizobacteria and its biocontrol effect to soil-borne diseases of cucumber was studied by means of growth-promoting screening and field trial method in order to get plant-growth promoting rhizobacteria for controlling soil-borne diseases of cucumber and evaluate its biocontrol effect. The results showed that the three screening strains PGPR, CH1, CH2 and CH3 could significantly promote the growth of cucumber in pot test and dish screening. Moreover, the antagonistic test in vitro found that the CH1 and CH2 exhibited antagonistic role to Fusarium oxysporum f. sp. cucumerinum, whilie no role to Pythium aphanidermatum, CH3 had antagonistic role on two pathogens. In addition, it was proved that the three PGPRs could control cucumber wilt and damping-off disease effectively in pot control efficacy test, field experiment further confirmed its efficacy and found that compatible and incompatible combination of PGPRs exhibited a better effect on growth-promoting and disease prevention than the single PGPR. All these results lay a substantial foundation for further research and industrialization of three PGPRs.

CLC Number:

S432.4

Liang Jiangen,, Zhang Bingxin, Shi Yuefeng, Zhu Lihong, Wu Ji’an. Study on Isolation and Screening of Plant-growth Promoting Rhizobacteria and its Biocontrol Acion to Soil-borne Diseases of Cucumber[J]. Chinese Agricultural Science Bulletin, 2007, 23(12): 341-341.

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Study on Isolation and Screening of Plant-growth Promoting Rhizobacteria and its Biocontrol Acion to Soil-borne Diseases of Cucumber

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