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Development of Integrated Pest Management Strategies for Apple Fruit Russet

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The goal of this work is to develop IPM strategies for control of apple fruit russet that is caused by Aureobasidium pullulans, a common fungal inhabitant of apple surfaces. We determined that the fungus is highly tolerant of pH changes and therefore attempting to alter the surface pH of the fruit is not likely to impact russet. Gibberellin applications significantly reduce the amount of fruit russet, however are not as effective as fungicides. A. pullulans varies considerably with regard to sensitivity to fungicides such as captan, polyram and the strobilurin group. This is likely to result in less than desirable russet control. Isolates of the fungus that were isolated from plants that were not likely to be sprayed with fungicides were more sensitive to the fungicides. This suggests that repeated use of the fungicides has resulted in a population of fungi that are tolerant of them. This is interesting because previously there were no reports of fungi developing tolerance to fungicides such as captan and polyram.

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2001

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New York State IPM Program

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Agricultural IPM; Apples; Fruits; Tree Fruit

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retrieved from: http://www.nysipm.cornell.edu/grantspgm/projects/proj01/fruit/burr.pdf

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