Evaluation of diflubenzuron for control of leafrollers (Lepidoptera: Tortricidae) on apple

Authors

  • D. W. Anderson Department of Plant Science University of British Columbia Vancouver, B.C.
  • R. H. Elliott Department of Plant Science University of British Columbia Vancouver, B.C.

Keywords:

oblique-banded leafroller, <i>Choristoneura rosaceana</i>, Lepidoptera, Tortricidae, insecticide toxicity

Abstract

The toxicity of diflubenzuron (Dimilin) to various stages of the oblique-banded leafroller, <i>Choristoneura rosaceana</i> (Harris), was evaluated under laboratory conditions. The compound had no ovicidal effect at concentrations up to 1000 ppm but foliage treated with 100 ppm diflubenzuron plus the surfactant, Tween 20, was toxic to 1st-instar larvae. At similar concentrations, diflubenzuron reduced the longevity of adult moths but had no effect on fecundity or egg viability.
In an orchard of mixed apple cultivars, diflubenzuron cover sprays applied at the pink bud stage significantly reduced fruit damage by leafrollers but failed to provide control comparable to that with azinphos-methyl.

References

Anderson, D.W. and R.H. Elliott. 1982. Efficacy of diflubenzuron against the codling moth, Laspeyresia pomonella (Lepidoptera: Olethreutidae) and impact on orchard mites. Can. Ent. 114:733-737.

Asher, K.R.S., N.E. Nemny, and I. Ishaya. 1980. The toxic effect of diflubenzuron on Spodoptera littoralis and on their respiration. Pestic. Sci. 11:90-94.

Elliott. R. H. and D. W. Anderson. 1982. Factors influencing the activity of diflubenzuron against the codling moth, Laspevresia pomonella (Lepidoptera: Olethreutidae). Can. Ent. 114:259-268.

Madsen, H.F. and B.E. Carty. 1977. Pest management: Four years experience in a commercial apple orchard. J. Ent. Soc. B.C. 74:3-6.

Madsen, H.F. and B.J. Madsen. 1980. Response of four leafroller species (Lepidoptera: Torticidae) to sex attractants in British Columbia orchards. Can. Ent. 112:427-430.

Retnakaran, A. 1979. Effect of a new moult inhibitor (EL-494) on the spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae). Can. Ent. 111:847-859.

Wearing, C.H. and W.P. Thomas. 1978. Integrated control of apple pests in New Zealand. 13. Selective insect control using diflubenzuron and Bacillus thuringiensis. Proc. 31st N.Z. Weed and Pest Control Conf. pp. 221-228.

Westigard, P.H. 1979. Codling moth: control on pears with diflubenzuron and effects on nontarget pest and beneficial species. J. Econ. Ent. 72:552-554.

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Published

2019-09-06

Issue

Vol. 79 (1982): Journal of the Entomological Society of British Columbia

Section

Articles

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