Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-09T05:54:48.222Z Has data issue: false hasContentIssue false

EFFECT OF A PHENYL-BENZOYL UREA [l-(4-CHLOROPHENYL)-3-(2,6-DIFLUOROBENZOYL)-UREA] ON DIPRION SIMILIS (HYMENOPTERA: DIPRIONIDAE)

Published online by Cambridge University Press:  31 May 2012

W. H. Fogal
Affiliation:
Great Lakes Forest Research Centre, Canadian Forestry Service, Sault Ste. Marie, Ontario

Abstract

Ingestion of a phenyl-benzoyl urea [1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)-urea] by Diprion similis (Hartig) interferes with molting. At the highest concentration (1% solution) tested, it prevents ecdysis but does not prevent apolysis. The Cuticle of pharate larvae is thinner than normal but the formation of melanin in the cuticle is not inhibited. At a concentration of.01%, ecdysis is usually completed but many survivors fail to feed following the molt. This failure is associated with the accumulation of a fibrous material in the midgut. Prior to the molt, food consumption as measured by faecal output is not impaired.

Résumé

L’ingestion d’un composé d’urée au phényl-benzoyl [1-(4-chlorophényl)-3-(2,6-difluorobenzoyl)-urée] par Diprion similis entrave la mue de l’insecte. Au point de concentration le plus élevé, (solution à 1%) mis à l’essai, elle empêche l’ecdysis mais n’empêche pas l’apolysis. La cuticule des larves "pharates" est plus mince que la normale mais la formation de mélanine dans la cuticule n’est pas entravée. Avec un point de concentration de 0.1%, l’ecdysis est habituellement totale mais de nombreux survivants cessent de se nourrir après la mue. Ce phénomène est relié à l’accumulation de matériel fibreux dans l’intestin moyen. Avant la mue, la consommation de nourriture telle que mesurée d’après les excrétions, n’est pas altérée.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Coppel, H. C., Mertins, J. W., and Harris, J. W. E.. 1974. The introduced pine sawfly, Diprion similis (Hartig) (Hymenoptera: Diprionidae). A review with emphasis on studies in Wisconsin. Res. Bull. Univ. Wisc. R 2393. 74 pp.Google Scholar
Fogal, W. H. and Kwain, M.-J.. 1972. Uric acid excretion by midgut epithelium in Gilpinia hercyniae (Htg.). Can. J. Zool. 50: 143145.CrossRefGoogle Scholar
Fogal, W. H. and Webb, D. P.. 1976. Cellulose content of food and faeces of Diprion similis as an internal marker for determining food consumption and digestibility. Can. J. Zool. 54: 571575.CrossRefGoogle Scholar
Granett, J. and Dunbar, D. M.. 1975. TH 6040: Laboratory and field trials for control of gypsy moths. J. econ. Ent. 68: 99102.CrossRefGoogle Scholar
Ishaaya, I. and Casida, J. E.. 1974. Dietary TH 6040 alters composition and enzyme activity of housefly larval cuticle. Pest. Biochem. Physiol. 4: 484490.CrossRefGoogle Scholar
Post, L. C. and Vincent, W. R.. 1973. A new insecticide inhibits chitin synthesis. Naturwissenschaften 60: 431432.CrossRefGoogle ScholarPubMed
Retnakaran, A. and Smith, L.. 1975. Morphogenetic effects of an inhibitor of cuticle development on the spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae). Can. Ent. 107: 883886.CrossRefGoogle Scholar
Retnakaran, A. and Smith, L.. 1976. Greenhouse evaluation of pH 60-40 activity on the forest tent caterpillar. Bi-mon. Res. Notes Can. For. Serv., Ottawa 32(1): 2.Google Scholar
Wellinga, K., Mulder, B., and van Daalen, J. J.. 1973. Synthesis and laboratory evaluation of 1-(2,6-disubstituted benzoyl)-3-phenyl urea, a new class of insecticides. I. 1-(2,6-dichlorobenzoyl)-3-phenyl ureas. J. Agric. Food Chem. 21: 348354.CrossRefGoogle Scholar
Wigglesworth, V. B. 1965. The principles of insect physiology. Methuen, New York. viii + 741 pp.Google Scholar