Sensitive developmental period of last-instar German cockroaches (Dictyoptera: Blattelidae) to fenoxycarb and hydroprene.

Abstract

The sensitive developmental period of last-instar German cockroaches, Blattella germanica (L.), to topical applications (10 micrograms/microliters) of fenoxycarb and hydroprene was determined. Developmental duration of last instars treated with fenoxycarb on days 1, 3, or 6 was 9-11 d longer than the development of nymphs treated with hydroprene or acetone. In addition, fenoxycarb caused mortality in 59% of the nymphs treated on day 6. A high level of wing twisting and sterility was observed among female and male cockroaches treated with fenoxycarb or hydroprene on days 1, 3, or 6 of the last stadium. Nymphal production by adults treated with juvenoids on day 9 of the last stadium (3-4 d before eclosion) was not affected. Our findings show that the sensitive developmental period for juvenoid-induced effects in last-instar B. germanica is limited to the first half of the stadium.

• Authors: J E King, G W Bennett
• Journal: Journal of medical entomology (J Med Entomol) Vol. 28 Issue 4 Pg. 514-7 (Jul 1991) ISSN: 0022-2585 [Print] England
• PMID: 1941911 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Carbamates
• Fatty Acids, Unsaturated
• Insecticides
• Juvenile Hormones
• Phenylcarbamates
• ethyl-3,7,11-trimethyl-2,4-dodecadienoate
• fenoxycarb

Topics

• Animals
• Carbamates
• Cockroaches
• Fatty Acids, Unsaturated
• Female
• Insecticides
• Juvenile Hormones
• Male
• Nymph
• Phenylcarbamates