Lambda-cyhalothrin. 1997 USDA article on temperature effects.

FLUORIDE ACTION NETWORK PESTICIDE PROJECT

Lambda-cyhalothrin. 1997 USDA article on temperature effects.

http://www.nalusda.gov/ttic/tektran/data/000008/12/0000081294.html

TEKTRAN
United States Department of Agriculture
Agricultural Research Service

TEMPERATURE EFFECTS ON LAMBDA-CYHALOTHRIN TOXICITY IN INSECTICIDE SUSCEPTIBLE AND -RESISTANT GERMAN COCKROACHES (DICTYOPTERA: BLATTELLIDAE)

Author(s):

VALLES STEVEN M
SANCHEZ-ARROYO HUSSEIN
BRENNER RICHARD J
KOEHLER PHILIP G

Interpretive Summary:

Pyrethroid insecticide toxicity can be significantly altered by changes in temperature which can lead to reduced control effectiveness in certain regions of the United States. However, the mechanism responsible for this effect has not been identified and few studies exist comparing the temperature toxicity relationship among insecticide-resistant and -susceptible insects. Therefore, scientists at the Center for Medical, Agricultural and Veterinary Entomology, Gainesville, Florida, have examined the effects of different temperatures on insecticide-resistant and -susceptible German cockroaches treated with a pyrethroid insecticide (lambda-cyhalothrin). They found that there was greater toxicity at lower temperatures for lambda-cyhalothrin-treated susceptible cockroaches, but not the resistant Village Green cockroaches. The resistant cockroaches exhibit a specific resistance mechanism which may be responsible for preventing the temperature-toxicity effect observed in the susceptible strain.

Keywords:

cockroaches fleas ants household insects control insecticide resistance

Contact:

MEDICAL, AGRIC & VETRY EN
1600 S.W. 23RD DRIVE
GAINESVILLE
FL 32608
FAX: (352)374-5818
Email: svalles@gainesville.usda.ufl.edu

Approved Date: 1997-07-24

TEKTRAN
United States Department of Agriculture
Agricultural Research Service

Updated: 1998-12-18