甲胺基阿维菌素苯甲酸盐对南方根结线虫的毒力、防效及安全性研究

选用02%高渗甲胺基阿维菌素苯甲酸盐(甲维盐)和18%阿维菌素对南方根结线虫进行室内毒力测定和盆钵药效试验.室内毒力测定结果显示:甲维盐对南方根结线虫二龄幼虫(J2)的毒力高于阿维菌素,甲维盐和阿维菌素的LC50值分别为0164 5、0453 2 mg·L-1.盆钵药效试验结果显示:甲维盐500倍液、1 000倍液对南方根结线虫病的相对防效为9367%、7969%,与阿维菌素防效相当,且甲维盐能显著抑制根结和卵块的产生.安全性测定结果显示:甲维盐各处理浓度对番茄生长均没有不良影响.表明:甲维盐可与阿维菌素交替应用于防治南方根结线虫病.

Toxicity and control efficacy of Emamectin benzoate to the root-knot nematode Meloidogyne incognita as well as its safety to tomato

The toxicity of Emamectin benzoate and Avermectin to juveniles of Meloidogyne incognita was tested in the lab. The tox-icity of Emamectin benzoate was higher than that of Avermectin. Their LC_(50) to juveniles were 0. 164 5 and 0. 453 2 mg·L~(-1) , respectively. Pot control efficacy of Emamectin benzoate on root-knot nematode of tomato as well as its safety to tomato was investigated. Pot experiment showed Emamectin benzoate was very efficacious on controlling this disease, and its relative control efficacies were 93. 67% and 79. 69% when the 500 times and 1 000 times dilution of it were used. Both of Emamectin benzoate and Avermectin were no variant according to relative control efficacy. Emamectin benzoate also could significantly inhibit the production of root-knots and egg sacs. At the same time, Emamectin benzoate was also very safe to the tomato growth. The study indicated that Emamectin benzoate and Avermectin could control root-knot nematode of tomato rotatively.