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- Title
防治马铃薯腐烂茎线虫病的植物源药剂筛选.
- Authors
彭静文; 赵远征; 王真; 王玉凤; 张妞; 王东; 周洪友
- Abstract
To explore the control effect of botanical pesticides on Ditylenchus destructor,the indoor toxicity of six botanical pesticides was tested by the direct contact method,and their effects on morphology,behavior change and body fluid penetration of D. destructor were observed. The pesticide with the highest toxicity to D. destructor was selected for pot and field study. Indoor virulence assay showed that carvacrol 5% AS,with lethal concentration of 50%(LC50)of 39. 542 mg/L,had the strongest inhibitory activity to D. destructor in 24 h. After the treatment of nematodes with carvacrol 5% AS and eucalyptol 5% EC,the nematode body stiffened and the dead nematodes showed bubble structures or cavities. In addition,six botanical pesticides increased the fluid leakage of D. destructor under the condition of LC50,and the suspension conductivity of the carvacrol 5% AS treatment was the highest in 24 h,reaching 70. 40 μS/cm. The control effect tests showed that carvacrol 5% AS had control effects of 65. 73% indoors and 53. 55% in fields,respectively. In conclusion,carvacrol 5% AS with higher inhibitory activity and control effect,can be used as a recommended agent for the control of D. destructor.
- Subjects
RESPONSE inhibition; CARVACROL; DEAD; NEMATODES; FIELD research; BODY fluids; PESTICIDES
- Publication
Journal of Henan Agricultural Sciences, 2022, Vol 51, Issue 4, p95
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004‐3268.2022.04.011