5种杀菌剂对短短小芽孢杆菌TW-2菌体及芽孢的影响
Acta Agriculturae Shanghai(2014)
Abstract
采用平皿计数法和抑菌圈法研究了5种化学杀菌剂(春雷霉素、三环唑、戊唑醇、稻瘟酰胺和咪鲜胺)对稻瘟病生防菌短短小芽孢杆菌TW-2菌株(Bacillus pumilus)菌体和芽孢存活的影响.结果表明:供试的5种化学杀菌剂在高浓度下(2 000 mg/L)可以完全抑制短短小芽孢杆菌TW-2菌株菌体和芽孢的存活,而低浓度下(0.32~8.00 mg/L)对菌体和芽孢的存活影响较小;在5种化学杀菌剂中春雷霉素对短短小芽孢杆菌TW-2菌株菌体和芽孢存活影响最大,其次依次是咪鲜胺、三环唑、戊唑醇、稻瘟酰胺.研究结果显示:稻瘟病生防菌短短小芽孢杆菌TW-2菌与供试的5种化学杀菌剂分别混用防治稻瘟病,这5种杀菌剂的浓度应在0.32 mg/L以下,否则会影响生防菌的效果.
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