Effect of Non-Pathogenic Fusarium oxysporum F-1 on Strawberry Gray Mold and Its Preliminary Mechanism Analysis

doi:10.16409/j.cnki.2095-039x.2022.04.010

Abstract

Abstract: Gray mold (Botrytis cinerea) is the main fungal disease of strawberry both during growth and after harvest,seriously affecting the yield and quality of strawberry.In this study,the control effects of salicylic acid,Trichoderma harziana and Fusarium oxysporum on the disease in fruits were determined.Field tests showed that the non-pathogenic F.oxysporum F-1 suppressed the disease by 70.06%,equal to the efficacy of 1000-times diluted 400g/L pyrimethanil suspension.Preliminary study on the suppression mechanism of F-1 on postharvest gray mold of strawberry showed that F-1 fermentation broth reduced hyphal adhesion of B.cinerea and inhibited germination rate of B.cinerea conidia by 19.8%.The activities of catalase,peroxidase and superoxide dismutase of strawberry could be maximally increased up to 13.6 U/g,158.9 U/g and 269 U/g respectively,after 2 days of inoculation of F-1 conidia and fermentation broth.The results suggest that F.oxysporum F-1 has the potential to be applied of in control of strawberry gray mold disease.

Key words: strawberry gray mold, Fusarium oxysporum, salicylic acid, defensive enzyme activity

CLC Number:

S476.1

XIAO Jiling, XIONG Yi, LIANG Zhihuai, YANG Ke. Effect of Non-Pathogenic Fusarium oxysporum F-1 on Strawberry Gray Mold and Its Preliminary Mechanism Analysis[J]. Chinese Journal of Biological Control, 2022, 38(4): 840-845.

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