Redistribution Of Fungicides In Coffee Trees

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Date
1973
Authors
Pereira, J.L.
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Abstract
Using coffee trees sprayed with cuprous oxide and captafol it has been shown that both fungicides are redistributed within the tree canopy by rain. Under conditions of light rain fungicides are removed from upper parts of trees and redeposited at lower levels within the canopy in amounts capable of providing effective protection against coffee berry disease (CBD). With heavy rainfall, however, redeposition offungicide at effective levels is less likely to occur. The results are discussed in relation to the success of overhead boom sprayers in controlling CBD and the observations that shoots in the upper parts of coffee trees are an important lQurce of spores of the CBD strain of Colletotrichum coffeanum.
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East African Agricultural and Forestry Journal, 9, pp. 209-218
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