Joint Action of Reduced-risk Insecticides Spinetoran with Chlorofluazuron or Fenpropathrin Against Cotton Leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae).

Abdel-Hafez, Hanan F.; Moharned, E. M.

Laboratory experiments were conducted to evaluate the efficacy of biorational product namely, spinetoram (Radiant 12 SC) and its mixtures with the chitin synthesis inhibitor (chioriluazuron 5 EC) and Pyrethroid insecticide (fenpropathrin 20 EC) against the 2nd instar larvae of Spodoptera littoralis (Boised.). The results indicated that, the interaction between spinetoram and chlorfluazuron or fenpropathrin revealed a potentiation effect in all treatments at different concentration of binary mixtures, except the mixture of spinetoram at (LC50), with fenpropathrin (LC10) which produced an additive effect ( 19.1). The observed mortality caused by both agents together was higher than with each agent alone. The most promising synergism occurred when LC25 of spinetoram was combined with LC25 of fenpropathrin ( 118.7), followed by chlorfluazuron ( 77.91). Laboratory studies suggests that, the use of spinetoram in combinations with either chlorfluazuron or fenpropathrin at low doses may be reduce the rate of used insecticides and consequently, reduce the costs of pesticides for controlling S. littoralis as well as reduce the environmental pollution.

INSECTICIDES; COTTON leafworm; ALABAMA (Insects); PARASITOIDS; PEST control; DRUG interactions; AGRICULTURAL chemicals; PESTICIDES; POLLUTION

Egyptian Journal of Biological Pest Control, 2009, Vol 19, Issue 1, p25

1110-1768

Academic Journal