Toxicity of 11 Phenylhydrazine Derivatives to Tobacco Root Knot Nematode
- Received Date: 23/11/2021
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Key words:
- root-knot nematode /
- phenylhydrazine hydrochloride /
- toxicity measurement
Abstract: Toxicity of 11 kinds of phenylhydrazine hydrochloride derivatives against tobacco root-knot nematodes was determined by direct contact method under laboratory conditions. The results showed that most of the insecticides had high toxicity to tobacco root-tie nematode, among which 4-fluorophenylhydrazine hydrochloride, 4-bromophenylhydrazine hydrochloride and 4-chlorophenylhydrazine hydrochloride had the highest toxicity to tobacco root-tie nematode, with LC50 values of 13.275 2 mg/L, 9.824 4 mg/L and 6.955 1 mg/L, respectively. When the ratio of abamectin to 4-chlorophenylhydrazine hydrochloride was 4:1, the synergistic effect was obvious.In addition, because 4-chlorobenzazid hydrochloride is corrosive to some extent, it can better promote the efficacy of avermectin. At the same time, this study has certain guiding significance for the preparation of compounds containing phenylhydrazine group and the selection of functional groups for the control of root-knot nematode.