Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (600 KB)

Title: Lethal effects of five molt inhibitors fed to the western spruce budworm (Choristoneura occidentalis Freeman) (Lepidoptera: Tortricidae) and the Douglas-fir tussock moth (Orgyia pseudotsugata [McDonnough]) (Lepidoptera: Lymantriidae)

Author: Rappaport, N.G.; Robertson, J.L.;

Date: 1981

Source: Pacific Southwest Forest and Range Experiment Station, Forest SErvice, U.S. Department of Agriculture, Berkeley, California U.S.A.

Publication Series: Miscellaneous Publication

Description: Five insect molt inhibitors (MI's) were mixed with artificial diet and fed to 3rd and 6th stage western spruce budworm (Choristoneura occidentalis) larvae and 2nd stage Douglas-fir tussock moth (Orgyia pseudotsugata) larvae. In general, tussock moth larvae were more susceptible that western spruce budworm larvae to these MI's SIR 6874 was by far the most toxic to 3rd and 6th stage western spruce budworm, and diflubenzuron the least toxic. TH 75331 and EL-494 both showed sustantial activity against this insect, while SIR 8514 was relatively less active but was still at least 3 times as toxic as diflubenzuron. Except for EL-494, there were no large differences in toxicity of these compounds to 2nd stage tussock moth larvae; EL-494 was 30-90 times less toxic than the others at the LC50. The other four MI's caused at least 50% mortality of 2nd stage tussock moth which were fed a diet containing less than 0.1 ppm of the MI's.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Rappaport, N.G.; Robertson, J.L. 1981. Lethal effects of five molt inhibitors fed to the western spruce budworm (Choristoneura occidentalis Freeman) (Lepidoptera: Tortricidae) and the Douglas-fir tussock moth (Orgyia pseudotsugata [McDonnough]) (Lepidoptera: Lymantriidae). Pacific Southwest Forest and Range Experiment Station, Forest SErvice, U.S. Department of Agriculture, Berkeley, California U.S.A.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.