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THIODICARB AND SULPROPHOS APPLIED TO WESTERN SPRUCE BUDWORM, CHORISTONEURA OCCIDENTALIS (LEPIDOPTERA: TORTRICIDAE), WITH AN AERIAL SPRAY SIMULATOR1

Published online by Cambridge University Press:  31 May 2012

Charles E. Richmond
Charles E. Richmond
Affiliation:
Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, California94701
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Abstract

Thiodicarb and sulprophos were applied to western spruce budworm, Choristoneura occidentalis Freeman, which were infesting small Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco. An aerial spray simulator was used for this application at three dosages. At 105 and 160 g a.i./ha, thiodicarb reduced the number of larvae/100 buds by at least 90%. Sulprophos failed to achieve the target mortality level of 90% or better, even at the highest dosage tested—at 380 g a.i./ha sulprophos reduced the number of larvae/100 buds by 74%. Thiodicarb appears to be the better candidate for future large-scale aerial tests.

Résumé

Des traitements au thiodicarb et au sulprophos ont été effectués contre la tordeuse occidentale de l'épinette, Choristoneura occidentalis Freeman infestant le sapin Pseudotsuga menziesii (Mirb.) Franco. Un simulateur d'arrosage aérien a été utilisé pour ces traitements effectués à 3 dosages. A 105 et 160 g IA/ha, le thiodicarb a réduit les nombres de larves/100 tiges d'au moins 90%. Le sulprophos n'a pas permis d'atteindre le niveau visé de mortalité de 90% ou plus, même au dosage tresté le plus élevé; à 380 g IA/ha, le sulprophos a réduit le nombre de larves/100 tiges de 74%. Le thiodicarb serait le meilleur choix pour les essais futurs de traitements aériens à grande échelle.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 4 , April 1983 , pp. 357 - 359
Copyright
Copyright © Entomological Society of Canada 1983

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References

Carolin, V. M. and Coulter, W. K.. 1972. Sampling populations of western spruce budworm and predicting defoliation of Douglas-fir in eastern Oregon. U.S. For. Serv. Res. Pap. PNW-149. 38 pp. Pacific Northwest Forest and Range Exp. Stn., Forest Service, U.S. Dep. Agric., Portland, Oreg.Google Scholar
Hamel, D. R. 1981. Forest management chemicals. Agric. Handbk 585. 512 pp. Forest Service, U.S. Dep. Agric., Washington, D.C.Google Scholar
Haverty, M. I. and Robertson, J. L.. 1982. Laboratory bioassays for selecting candidate insecticides and application rates for field tests on the western spruce budworm. J. econ. Ent. 75: 179–182.CrossRefGoogle Scholar
Markin, G. P. and Johnson, D. R.. 1981. Western spruce budworm aerial field tests, 1980. Insectic. and Acaricide Tests 6: 159.CrossRefGoogle Scholar
Martineau, R. and Benoit, P.. 1973. A sampling technique for estimating numerical trends in larval populations of insect defoliators on conifers II. Modification and operational use of the technique for extensive sampling of spruce budworm populations in Quebec. Phytoprotection 54: 23–31.Google Scholar
Richmond, C. E. 1981. Simulating aerial sprays for the western spruce budworm (Lepidoptera: Tortricidae): Evaluation of technique and two candidate insecticides. Can. Ent. 113: 819–825.CrossRefGoogle Scholar