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Pesticide Application Methods, Fourth Edition
20, DOI: 10.1002/9781118351284.ch1614

Application of biopesticides

G. A. Matthews, Roy Bateman and Paul Miller

International Pesticide Application Research Centre, Imperial College, Silwood Park, Ascot, UK.


This chapter considers the special requirements of biopesticides that can be applied with equipment designed for the application of chemical pesticides. Combining the commercial markets for various subspecies and isolates of Bacillus thuringiensis, this microbial control agent (MCA) probably remains the most important to date. An important feature of MCAs is that they must be delivered to the target as particles, usually suspended in a liquid and dispersed as spray droplets. The size spectra of suspended particles in formulations give a good indication of formulation quality. Optimisation of droplet size has been adopted extensively for treatment of forests to minimise impact in streams within the forest ecosystem. In the case of Metarhizium acridum, rates of pest mortality are known to be dose dependent for a given time after application and the efficacy is enhanced using oil as a carrier liquid.

Keywords: Bacillus thuringiensis; biopesticides; forests; formulation; Metarhizium acridum; microbial control agents (MCAs); spray tank mixtures.

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