Tolerance of Stethorus punctum Adults and Larvae to Various Pesticides12

Abstract

Thirty-eight miticide, insecticide, and fungicide treatments were tested by a laboratory dip method for toxicity to adults of a ladybird beetle, Stethorus punctum (LeConte). Six treatments were tested for toxicity to larvae. Highly toxie to adults were Bay Hox 2709 ( O -(3-Chloro-7-methylpyrazolo [1,-5-a] pyrimidin-2yl) O, O -diethyl phosphorothioate) and CGA 13608 ( o -(Methyl-2-propinylamino) phenyl methylcarbamate) at 0.5 lb AI/100 gal, carbaryl and Dursban® ( O- (3,5,6-trichloro-2-pyridyl) phosphororthioate) at 0.25 lb AI/100 gal, Mesurol® (4-(methylthio)-3,5-xylyl methylcarbamate) at 0.094 lb AI/100 gal, and Ortho 15223 O,S -dimethyl(methoxyacetyl)-phosphoramidothioate at 0.3 and 0.6 lb AI/100 gal. Carbaryl at 0.125 lb AI per 100 gallons was highly toxic to larvae, and Ortho 15223 was moderately toxic to larvae at 0.15 and 0.30 lb AI per 100 gal. All other materials exhibited either moderate or low toxicity to adults and larvae, and they appear to have a place in future integrated chemical and biological control of fruit pests.