PJB-2021-712
Inhibition of fungicide on Sclerotinia sclerotiorum of cucumber at different growth stages and field control effects
Dan Zhang, Xilin Sun, Xinyue Ma, Ronglie Gong and Xiaomei Wang
Abstract
In order to screen high-efficient fungicides against Sclerotinia rot of cucumber, the growth rate inhibition method was used to determine the effects of 10 fungicides on the silk growth and sclerotia formation of Sclerotinia rot of cucumber, and the virulence regression equation was constructed to calculate the EC50 value. On the basis of indoor experiments, four kinds of fungicides with good inhibition effect were selected for field efficacy trials and their effects on controlling cucumber sclerotinia rot in the field were evaluated. The indoor results show that: The growth of Sclerotinia sclerotiorum silk was highly inhibited by 200g/L fluoroacyl-hydroxy-benzotriazole (SC), 45% prochloraz (EW), 25% imazalil-fludioxonil (SE), 38% Oxazolidinyl bacteria. The growth of Sclerotinia sclerotiorum nucleus was highly inhibited by 38% azolyl-boscalid (SE), 50% boscalid (WG), 200g/L Benzene propiconazole (EC) and 25% imazalil-fludioxonill (SE). Two fungicides, 25% imazalil-fludioxonil (SE) and 38% Oxazolidinyl bacteria (SE), could inhibit the growth of both hyphae and sclerotium. The results of field efficacy trials showed that: The field efficacy of 45% prochloraz (EW) and 200g/L fluoroacyl-hydroxy-benzotriazole (SC) was significantly higher than that of the control 50% carbendazim (WP). The field efficacy of 25% imazalil-fludioxonil (SE) and 38% azolyl-boscalid (SE) was not as significant as that of the control. This experiment provided a theoretical and practical basis for the fungicide control of Sclerotinia rot of cucumber in production.
To Cite this article:
Zhang, D., X. Sun, X. Ma, R. Gong and X. Wang. 2023. Inhibition of fungicide on Sclerotinia sclerotiorum of cucumber at different growth stages and field control effects. Pak. J. Bot., 55(3): DOI: http://dx.doi.org/10.30848/PJB2023-3(12)
Download
