SEASONALITY AND SAMPLING OF THE MANGO SHOOT BORER, Chlumetia transversa Walker p (LEPIDOPTERA : NOCTUIDAE)
Field observation on C. transversa showed that the peak percent infestation was in September, 1996 (22.26%) and in November, 1997 (47.17%). Correlation analysis showed that there was a very significant correlation between percentage infestation of lower and upper canopies. Both lower and upper canopies were again significantly correlated to total infestation. Alinear and a polynomial models were worked to estimate total infestation based on lower canopy sampling. Athird order polynomial model was worked out to predict infestation, using mean RH as a variable, with areliability of 53%.
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