陕西洛南烟区根结线虫病原鉴定及生物制剂防效评价

Pathogen Identification of Tobacco Root-Knot Nematode and Control Effect of Microbial Pesticide in Luonan Tobacco-Growing Area of Shaanxi Province

摘要: 为解决当前洛南烟区根结线虫病为害严重问题，本研究在发病区取样、分离和形态鉴定，并根据病原种类开展了小区药效试验，对不同药剂的防治效果进行了评价。结果表明，洛南烟区的根结线虫种类主要是南方根结线虫(Meloidogyne incognita (Kofold & White) Chitwood)；线虫1号菌剂、淡紫紫孢微生物菌剂和噻唑膦对根结线虫都有一定的防效，且联合用药效果好于单一用药；其中，线虫1号菌剂 + 淡紫紫孢微生物菌剂 + 噻唑膦颗粒剂联合使用对根结线虫的防效最好。

Abstract: In order to solve the serious problem of root-knot nematode disease in Luonan tobacco-growing area, the species of root-knot nematode were sampled from the affected area and identified based on morphological characteristics, the field plot trial was employed in reaction to the etiology, and the control effects of different agents were evaluated. The results showed that the root-knot nematode species of Luonan tobacco-growing area is Meloidogyne incognita (Kofold & White) Chitwood. Nematode No. 1 bactericide, purpura uvula microbial bactericide and phosphine thiazole granules are effective in treatment of the root-knot nematode, and the combined effect is better than single drug. Among them, the combination of Nematode No. 1 bactericide + purpura uvula microbial bactericide + phosphine thiazole granules showed the best control effect on root-knot nematode.