マツノマダラカミキリの後食防止に関するフェニトロチオンの作用

概要

論文の詳細を見る
Fenitrothion is a chemical which is used for the control of pine wilting disease. It was spread uniformly on pine twigs for analyzing the relation between the dose applied on the twigs and the area of maturation feeding and lethal time. The average period of maturation feeding throughout the 5 days was reduced to half of that of the control at the dose of 0.3 μg/cm^2. At the dose of 0.44 μg/cm^2,all of the tested beetles died within 3 days and the area of maturation feeding was 0.67±0.52 cm^2 (male) and 0.87±0.53 cm^2 (female), corresponding to one tenth of that of the control. It was considered that the insecticidal activity of fenitrothion applied on the branches corresponded to about 20% of the oral absorption of this chemical when the insects swallowed the outer bark at the time of maturation feeding. Contact toxicity and vapor action were not observed. For doses ranging from 0.44 to 3.0 μg/cm^2,the average amount of chemical absorbed ranged from 0.06 to 0.18 μg/insect. Based on these results, the average oral toxicity of fenitrothion for the male at 1 day was estimated at 0.16 μg/insect and that of the female at 0.18 μg/insect. It is concluded that the concentration of this chemical on the twigs should range from 0.44 to 3.0 μg/cm^2 or higher in taking account of the relation between the inhibition of the area of maturation feeding and the lethal time.
日本応用動物昆虫学会の論文
1988-11-25