PRELIMINARY FIELD TRIALS WITH BACILLUS THURINGIENSIS – CHEMICAL INSECTICIDE COMBINATIONS IN THE INTEGRATED CONTROL OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

Author:

Morris O.N.,Armstrong J. A.

Abstract

AbstractBacillus thuringiensis (B.t.) + sublethal doses of the organophosphates fenitrothion or Orthene® were aerially applied to spruce budworm infested white spruce and balsam fir trees. B.t. + fenitrothion applied at 10 BIU + 17.5 g active ingredient in 4.71./ha (4 BIU + 0.25 oz in 0.5 gal/acre) and depositing at 1.5 to 3.0 BIU + 2.1 to 4.9 g/ha (0.03 to 0.07 oz/acre) did not protect the trees in the year of application owing to too low application rates but apparently gave good protection 1 year later without further treatment. A B.t. + Orthene combination applied at 20 BIU + 42 g/ha (8 BIU + 0.6 oz/acre) and depositing at the rate of 6.9 BIU + 12.6 g/ha (2.29 BIU + 0.18 oz/acre) provided good protection for both tree species in the year of spray.Moth emergence was substantially reduced by 20 to 30 BIU B.t. + Orthene combination treatment. Thuricide fenitrothion, Dipel fenitrothion, and 30 BIU Orthene treatments reduced oviposition rate by at least 62%, 47%, and 47%, respectively. B,t. + a low dose of Orthene apparently had no major destructive effects on larval, pupal, or egg parasites whereas B.t. + a low dose of fenitrothion seriously reduced egg parasitism.The data indicate the possibility of using B.t. in combination with low doses of chemical insecticides against the spruce budworm as an alternative to high doses of chemical insecticides alone.

Publisher

Cambridge University Press (CUP)

Subject

Insect Science,Molecular Biology,Physiology,Ecology, Evolution, Behavior and Systematics,Structural Biology

Cited by 9 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3