A new approach to the application of fungicides for prevention of black pod and other fungous diseases of cocoa
1991
Pettitt, T.R. | Sreenivasan, T.N. | Rudgard, S.A.
Promising results were obtained for black pod control in a small-scale field trial of an alternative method fungicide application to spraying proposed by the CRU. Copper fungicide was incorporated into water permeable collars placed high in the pod bearing canopy. These redistributed copper to all parts of the tree below in rain water and it flowed down through the canopy. At rates of active ingredient comparable to 1-2 sprays, 100 % control was obtained on all test trees in a plot where untreated trees sustained approximately 60 % losses to black pod. Details of copper redistribution and the efficacy of the resulting deposits are discussed in relation to the results of a concurrent spray trial. Present work and proposed further studies are also outlined.
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