Residual effects of carbaryl and dicofol on Aphytis holoxanthus Debach (Hymenoptera: Aphelinidae)
1999
Rehman, Salim Ur | Browning, H.W. | Nigg, H.N. | Harrison, J.M.
Aphytis holoxanthus Debach is an important biological control agent of Florida red scale, Chrysomphalus aonidum (L.). Laboratory tests quantified the mortality of this hymenopteran parasite caused by field residues of carbaryl and dicofol. Behavior and mortality of adult A. holoxanthus on carbaryl-treated "Hamlin" orange leaves were related to quantities of dislodgeable pesticide residues over time as field residues weathered. After 24 h, mortality of A. holoxanthus by dicofol was not observed through day 31 when the experiment was terminated. Our data showed that field-weathered carbaryl residues killed A. holoxanthus for a period of up to 22 days posttreatment under spring conditions in Florida.
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