Variability In Growth Of Colletotrichum Gloeosporioides Isolates Pathogenic On Cacao In Response To Fungicides, Antibiotics And Detergent
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Date
1991
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Abstract
Growth rates of three virulent isolates of Colletotrichum gloeosporioides Penz. causing foliar diseases viz., blight, shot hole and irregular spot on cacao were compared on potato dextrose agar medium containing different concentrations of fungicides (Carbendazim and Mancozeb), antibiotics (Nystatin and Actidione) and a detergent (Cetavlon). The three isolates varied markedly from each other in their growth response in the presence of these chemicals. Of the two fungicides tested, the isolates were more sensitive to Carbendazim than Mancozeb. The growth of all the three isolates was completely inhibited in the presence of Carbendazim at 5 and 10 u g/ml medium, whereas the growth of irregular spot isolate was completely inhibited even at 3 ug/ml medium. The isolates were found to be sensitive to Nystatin and Actidione though complete inhibition of growth was not observed at any of the concentrations tested. All the three isolates also showed marked variation in growth in response to Cetavlon. The irregular spot isolate was more sensitive to Cetavlon than the other two.
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J.Plantn.Crops 1991 Suppl. v-18 p-229-232