Effects of fenvalerate insecticide on pollinators


  • D. F. Mayer Department of Entomology Washington State University IAREC Prosser, WA
  • C. A. Johansen Coeur d'Alene, ID
  • C. H. Shanks Southwestern Washington Research Unit Washington State University Vancouver, WA
  • K. S. Pike Department of Entomology Washington State University IAREC Prosser, WA


Susceptibility to fenvalerate sprays was greatest for the alfalfa leafcutting bee, <i>Megachile rotundata</i> (Fabr.); least for the honey bee, <i>Apis mellifera</i> L., and intermediate for the alkali bee, <i>Nomia melanderi</i> Cock. Low temperatures increased the residual toxic effects of fenvalerate to honey bees. Fenvalerate at 0.22 kg Al/ha had low residual hazard to bees after one day under Pacific Northwest conditions. Field tests of fenvalerate on blooming alfalfa, pollen-shedding corn, and blooming red raspberry resulted in reduced bee visitation and low to moderate adult bee mortality.


Atkins, E.L., D. Kellum, and K.W. Atkins. 1981. Reducing pesticide hazards to honey bees: Mortality prediction techniques and integrated management strategies. Univ. Calif. Leaflet 1883. 23 pp.

Clinch, P.G. 1971. A battery-operated vacuum device for collecting insects unharmed. NZ Entomol. 5:28-30.

Duncan, D.B. 1951. A significant test for differences between marked treatments in an analysis of variance. VA J. Sei. 2:171-189.

Johansen, C.A., D.F. Mayer, J.D. Eves, and C.W. Kious. 1983. Pesticides and bees. Environ. Entomol, 12(3):1513-1518.

Mayer, D.F. and C.A. Johansen. 1983. Occurrence of honey bee (Hymenoptera: Apidae) poisoning in eastern Washington. Environ. Entomol. 12(2):317-320.

Mayer, D.F., C.A. Johansen, J.D. Lunden, and Lora Rathbone. (In press). Chemical stickers and bee mortality. Aner. Bee J. .

Moffett. J.O., A. Stoner, and R.M. Ahring. 1982. Effect of fenvalerate applications on honey bees in flowering alfalfa. Southwest. Entomol. 7(2):111-115.

Stoner, J.P., W.T. Wilson, and J.O. Moffett. 1984. Effect of long-term feeding of low doses of fenvalerate or fluvalinate in sucrose syrup on honey bees in standard-size field colonies. J. Georgia Entomol. Soc. 19(4):490-498.

Stoner, A., W.T. Wilson, and Jack Harvey. 1985. Honey bee exposure to beeswax foundation impregnated with fenvalerate or carbaryl. Amer. Bee. J. 125(7):513-516.