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acre Agege Amelonado Average b.sc bean weight black-pod Bordeaux mixture butterfat cacao trees canopy cassava cent chupons clones Cocoa Research Institute coffee Cola CRIN crop crosses CSSV disease dry season effect establishment experiment F3 Amazon fertilizer field flowers fungicide Gambari Experimental Station germination Ghana girth grafting growth hand pollinated harvested hybrids Ibadan Ikire Ikom Ilesha infected insecticides isolates jorquetting kola nuts kola trees leaf leaves lindane March mealybugs Mean method Ministry of Agriculture mirids months Moor Plantation mulch njalensis November nursery nut weight observed obtained palmivora parent percentage period Phytophthora Phytophthora palmivora plants plots pods pollination polythene produced recorded replicates root rootstocks samples seedlings seeds selected shade showed shown in Table singularis soil spraying stem diameter survival symptoms tested Theobroma Theobroma cacao Toxopeus treatments tree cassava Trinitario varieties virus WACRI weeks Western Nigeria yield zoospores