Development of Corn Seed Coating Agent Containing OH11 Fermentation Broth and Effect Evaluation on Stalk Base Rot

doi:10.16409/j.cnki.2095-039x.2022.08.006

Abstract

Abstract: Orthogonal test was used to screen dispersants, emulsifiers and thickeners, and OH11 fermentation broth was developed into 30% suspension seed coating agent by wet sand milling method. The effects on corn root length, seedling length and fresh weight were determined under different drug species ratio, and the control effect of pesticides on corn stalk base rot (Pythium) was determined by the bacteria-soil mixing method. The results showed that the optimal formula of 30% OH11 fermentation broth suspension seed coating agent was 30% OH11 fermentation broth, 0.8% lignin, 3% PEG4000, 0.2% XG, 4% red dye, 3% film-forming agent, and water. The seed coating agent had little effect on the growth and development of corn by coating seeds at a ratio of 1:200 and 1:500. The control efficacy on corn stem base rot (Pythium) was 93.55% at ratio 1:200, and 80.51% at ratio 1:500, significantly higher than the control agent 30% tebuconazole suspension seed coating agent (39.16%). The results showed that 30% OH11 fermentation broth suspension seed coating agent has the potential for application in control of corn stem base rot (Pythium) disease.

Key words: OH11 fermentation broth, corn seed coating agent, corn stalk rot, Pythium

CLC Number:

S435.131

REN Xuexiang, SU Xianyan, YAN Xuemei, CHI Yu, LI Zhao, YE Zhenghe. Development of Corn Seed Coating Agent Containing OH11 Fermentation Broth and Effect Evaluation on Stalk Base Rot[J]. Chinese Journal of Biological Control, 2022, 38(6): 1566-1571.

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