Effect of Pesticide Residues on the Natural Enemies of Citrus Mealybug12
作者:
Dale E. Meyerdirk,
J. V. French,
William G. Hart,
期刊:
Environmental Entomology
(OUP Available online 1982)
卷期:
Volume 11,
issue 1
页码: 134-136
ISSN:0046-225X
年代: 1982
DOI:10.1093/ee/11.1.134
出版商: Oxford University Press
数据来源: OUP
摘要:
The toxic residual activities of four pesticides, phosmet, carbaryl, diazinon and dimethoate, were tested against natural enemies of the citrus mealybug,Planococcus citri(Risso). Species tested included four parasites,Pauridia peregrinaTimberlake,Leptomastidea abnormis(Girault),Leptomastix dactylopiiHoward, andAnagyrus pseudococci(Girault), and two predators,Cryptolaemus montrouzieriMulsant andSympherobius barberi(Banks). These natural enemies were exposed 24 h to pesticide residues on leaves of commercially treated citrus at intervals of 1, 9, 16, 23, and 30 days posttreatment to determine their susceptibility to and the persistence of toxic residues. Phosmet and carbaryl had significantly high toxic residual activity up to 30 days posttreatment against the majority of natural enemies tested. Diazinon and dimethoate toxic residue activity decreased significantly in 9 days against the majority of species tested.
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