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Live Varroa jacobsoni (Mesostigmata: Varroidae) fallen from honey bee (Hymenoptera: Apidae) colonies.

Abstract
The proportion of Varroa jacobsoni Oudemans that were alive and mobile when they fell from honey bees, Apis mellifera L., in hives was measured during a 20-wk period to determine the potential use of systems that prevent these mites from returning to the bees. Traps designed to discriminate between the live, fallen mites and those that are dead or immobile were used on hive bottom boards. A large fraction of the fallen mites was alive when acaricide was not in use and also when fluvalinate or coumaphos treatments were in the hives. The live proportion of mitefall increased during very hot weather. The proportion of mitefall that was alive was higher at the rear and sides of the hive compared with that falling from center frames near the hive entrance. More sclerotized than callow mites were alive when they fell. A screen-covered trap that covers the entire hive bottom board requires a sticky barrier to retain all live mites. This trap or another method that prevents fallen, viable mites from returning to the hive is recommended as a part of an integrated control program. It also may slow the development of acaricide resistance in V. jacobsoni and allow the substitution of less hazardous chemicals for the acaricides currently in use.
AuthorsT C Webster, E M Thacker, F E Vorisek
JournalJournal of economic entomology (J Econ Entomol) Vol. 93 Issue 6 Pg. 1596-601 (Dec 2000) ISSN: 0022-0493 [Print] England
PMID11142286 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S.)
Chemical References
  • Insecticides
  • Nitriles
  • Pyrethrins
  • fluvalinate
  • Coumaphos
Topics
  • Animals
  • Bees (parasitology)
  • Coumaphos
  • Insecticides
  • Mites
  • Nitriles
  • Pest Control (instrumentation, methods)
  • Pyrethrins

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