壳聚糖和水杨酸对黄瓜根结线虫的防治

Effects of Chitosan and Salicylic Acid on the Control of Cucumber Root Knot Nematode

为了探讨外源壳聚糖(CTS)和水杨酸(SA)处理对黄瓜根结线虫的诱抗效果,以及对黄瓜生长的影响。以黄瓜为材料,通过盆栽和田间药效试验,测定CTS)和SA处理对黄瓜根结线虫的卵块形成抑制率、病情指数及防效和黄瓜产量的影响。不同浓度CTS和SA均对黄瓜根结线虫具有一定的防效,且两者具有协同增效作用,田间试验喷施叶面处理和灌根处理中均以150mg/LSA与100mg/LCTS混合处理防效最佳,且灌根处理优于喷雾叶面处理,防效达44.55%,小区产量比对照增加27.3%。150mg/LSA与100mg/LCTS混合灌根处理对黄瓜根结线虫具有良好的防效与增产作用,显示出一定的应用价值。

The effects of exogenous chitosan（CTS）and salicylic acid（SA）on the control of cucumber root knot nematode and cucumber yield were investigated.The influences of CTS and SA treatment on the control efficacy of root knots and eggs,disease index,field control efficacy and cucumber yield were detected in pot and field experiments.The results showed that CTS and SA both possessed nematocidal activity,and had synergetic effects.In field experiments,a mixture solution of 150 mg/L SA and 100 mg/L CTS was effective in controlling cucumber root knot nematode,and root pouring treatment had better control effect than spraying treatment with 44.55% control effect and a 27.3% increase in cucumber productivity.A mixture solution of 150 mg/L SA and 100 mg/L CTS root pouring treatment had best control efficacy of cucumber root knot nematode and could increase yield.