Development and application of Bacillus subtilis ZWZ-19 dispersible oil suspension agent for Ditylenchus destructor
To develop a control agent for Ditylenchus destructor,Bacillus subtilis ZWZ-19,obtained in our previous study was used to prepare a dispersible oil suspension formulation for seed-dressing of potatoes.By testing the effects of different emulsifiers on the stability of the formulation,combining with suspension rate,pourability,particle size,static surface tension,and dynamic contact angle,the optimal formula for the ZWZ-19 dispersible oil suspension was selected:20％Bacillus subtilis mother liquor,15％NP-10,3％OMMT,0.5％ethylene glycol,3％white carbon black,and soybean oil to make up 100％.The suspension rate of the formulation was above 95％before and after thermal storage,and the decomposition rate of the active ingredient was less than 5％.Field test results showed that the ZWZ-19 dispersible oil suspension had a control efficacy of 69.61％against stem rot nematode disease caused by Ditylenchus destructor,with a yield increase effect of 16.38％.
NETL
NSTL
万方数据
