Seasonality and sampling of the mango shoot borer, Chlumetia transversa Walker (Lepidoptera: Noctuidae).
Abraham Verghese, Devi K. S.
Author Affiliation: Division of Entomology, Indian Institute of Horticultural Research, Hessaraghatta Lake P.O., Bangalore - 560 089, India.
Pest Management in Horticultural Ecosystems 4 : 16-20
Abstract : Field observations of C. transversa in mangoes in Bangalore, Karnataka, India, 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. A linear and a polynomial model were worked out to estimate total infestation based on lower canopy sampling. A third order polynomial model was worked out to predict infestation, using mean RH as a variable, with a reliability of 53%.