Abstract:

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.