DPX-MP062-a potent compound for controlling the Egyptian cotton leafworm Spodoptera littoralis (Boisd.)

✍ Scribed by Pluschkell, Uwe; Horowitz, A. Rami; Weintraub, Phyllis G.; Ishaaya, Isaac

• Book ID: 101214891
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 188 KB
• Volume: 54
• Category: Article
• ISSN: 1526-498X
• DOI: 10.1002/(sici)1096-9063(1998100)54:2<85::aid-ps782>3.0.co;2-i

✦ Synopsis

The e †ects of 3,4a, ,3,4] oxadiazine-4a-carboxylate] a broad-spectrum insecticide with a novel mode of action, on the Egyptian cotton leafworm, Spodoptera littoralis, were studied in laboratory experiments. Egg hatch was a †ected by high concentrations (125 mg AI litre~1) of DPX-MP062. Larvae that hatched from treated eggs were signiÐcantly a †ected at concentrations of 12É5 mg AI litre~1 and greater. Larvae were fed castor bean leaves treated with DPX-MP062 ; 1st-instar larvae were the most susceptible development stage. Pupation and adult formation were determined in assays with 5th-instar larvae. There was strong suppression of adult formation ; 65 and 91% at 0É5 and 0É75 mg AI litre~1, respectively. Highly a †ected larvae died before pupation ; slightly a †ected ones reached pupation 2È4 days later, were smaller than larvae in the untreated control, and were sometimes unable to develop into normal adults. Comparatively high concentrations (50 and 100 mg AI litre~1) of the test compound were necessary to a †ect adults by ingestion, but no e †ects from contact application could be determined at a concentration of 100 mg AI litre~1.