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METHODS OF APPLICATION OF MICROBIAL PESTICIDE FORMULATIONS FOR THE CONTROL OF GRASSHOPPERS AND LOCUSTS

Published online by Cambridge University Press:  31 May 2012

Roy Bateman
Roy Bateman*
Affiliation:
International Institute of Biological Control, Ascot, Berkshire, SL5 7TA, United Kingdom
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Abstract

The use of chemical insecticides, especially as ultra low volume (ULV) formulations, against locusts and grasshoppers will continue for the foreseeable future; therefore application techniques for microbial agents should be as compatible as possible with existing practice. Low volume and ULV spraying of deuteromycete conidia in oil-based formulations have produced very promising acridid control results in the field, although baiting, dusting, and hydraulic application techniques have also been tested for a wide range of pathogens.The key problems for further research and development appear to be the logistics and supply of consistently reliable formulations for application on a large scale, and the determination of mechanisms for effective dose transfer in the field. The application of suspended particulate matter can present special problems with rotary and other atomizers.

Résumé

Les insecticides chimiques, particulièrement en préparation ulta-légères (ULV), risquent d'être utilisés encore fort longtemps dans la lutte contre les criquets; les techniques d'application d'agents microbiens de lutte se doivent donc d'être le plus compatibles possible avec les méthodes courantes. La vaporisation de préparations légères et ultra-légères de conidies de deutéromycètes dans des émulsifiants à base d'huile a déjà donné des résultats très prometteurs dans la lutte contre les criquets en nature; d'autre méthodes, utilisation d'appâts, saupoudrage, techniques d'application hydraulique, ont également été testées pour plusieurs pathogènes.

Les problèmes qui constituent présentement une barrière à la recherche et à l'élaboration d'autres méthodes sont reliés à des questions de logistique et à la difficulté d'obtenir des préparations toujours fiables, utilisables sur une grande échelle, de même qu'à celle de mettre au point des mécanismes de transfert de doses efficaces en nature. Les préparations à base de particules en suspension présentent des problèmes particuliers d'application lorsqu'elles sont répandues au moyen de vaporisateurs rotatoires ou d'autres engins de pulvérisation. [Traduit par la Rédaction]

Type
Research Article
Information
The Memoirs of the Entomological Society of Canada , Volume 129 , Supplement S171 , 1997 , pp. 69 - 81
Copyright
Copyright © Entomological Society of Canada 1997

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