Control effect of different pesticide types on root-knot nematode in mel-on seedlings
YANG Tian
MA Hefang
WANG Xiang
WENG Aiqun
ZHANG Wan
MA Jianxiang
Abstract：In order to screen out excellent pesticides for controlling root-knot nematodes,eight pesticides from four differ-ent types were selected for treatment of melon seedlings infected with root-knot nematodes.Growth index,the enzyme activity of leaf antioxidant system,the reduction rate of insect mouth and the change of root knot index were measured and compared,using normal irrigation and no pesticide applicaiton as the control group(CK).The results showed that compared to CK,pesticide treatment effectively alleviated the damage caused by root-knot nematode to melon seedling growth,enhanced the activity of peroxidase and superoxide dismutase superoxide dismutase in the leaves,while reducing the activity of catalase,as well as the content of malondialdehyde,hydrogen peroxide and the rate of superoxide anion production.Among the treatments,the 41.7％fluxamide treatment achieved a nematode reduction rate of 92.87％and a root-knot control effect of 60.79％.Comprehensive comparison showed that the optimal dosage for each melon seedlings was 2.5×10-3mnL of 41.7％fluxamide,followed by Bacillus cereus(effective 1×1010CFU·g-1)at 0.125 g,and Trichoderma harzianum(effective 1×1010CFU·g-1)at 0.125 g.The results of this study can provide a reference for pesticide selection in production practices.
Keywords：MelonBiological controlRoot-knot nematode
Publication Date：2025-05-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 116-124 )