日本落叶松根腐病化学防治药剂的筛选

Study on the Selection of Pesticides for the Control of Root Rot of Japanese Larch

采用菌饼法测定了40%五氯硝基苯等9种农药对日本落叶松根腐病主要病原丝核菌的室内毒力;选取抑菌效果达80%以上的6种农药进行盆栽防治试验,结果表明:五氯硝基苯、立枯净、移栽灵和土菌硝等对日本落叶松根腐病的防治效果较好。

Root rot of Japanese larch is a kind of forest disease that seriously occurred in the west mountain areas of Hubei in recent years. The research results showed that rhizoctonia was the primary pathogeny that caused the disease. The toxicity of 40% of pentachloronitrobenzene and other 9 pesticides to rhizoctonia were determined with the method of fungus cake, among which, 6 pesticides had the controlling effect of above 80% in the control test of potted plant. The results demonstrated that pentachloronitrobenzene and others had good control effect on the control of root rot of Jananese larch.