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CONTACT TOXICITIES OF FIVE PYRETHROID AND FOUR ORGANOPHOSPHOROUS INSECTICIDES TO TOUMEYELLA PARVICORNIS (COCKERELL) CRAWLERS

Published online by Cambridge University Press:  31 May 2012

S.R. Clarke ,
G.L. DeBarr  and
T.X. Liu
S.R. Clarke
Affiliation:
Forest Pest Management, 2500 Shreveport Hwy, Pineville, Louisiana, USA71360
G.L. DeBarr
Affiliation:
U.S. Forest Service, Green Street, Athens, Georgia, USA30602
T.X. Liu
Affiliation:
University of Georgia, Department of Entomology, Athens, Georgia, USA30223
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Extract

The use of pyrethroids in southern pine seed orchards to control seed and cone insects has sometimes resulted in outbreaks of scale insects (Nord et al. 1985). Onset of these infestations has been related in part to the relatively low contact toxicities of pyrethroids (Clarke et al. 1988). Pyrethroids have lower contact toxicities than organophosphorous insecticides against crawlers of the striped pine scale, Tourneyella pini (King). Our objective was to determine if a similar relationship existed for the pine tortoise scale, Tourneyella parvicornis (Cockerell), another scale insect pest that infests southern pine seed orchards.

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 3 , June 1992 , pp. 563 - 564
Copyright
Copyright © Entomological Society of Canada 1992

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References

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