Bio Physical mechnism of resisitance to major pests of brinjal

Abstract

An Experiment was carried out with 44 brinjal genotypes at college farm, College of Horticulture, Dr.Y.S.R. Horticultural University, V.R.Gudem to see the effect of biophysical characters of plants on the infestation of major pests on different brinjal genotypes. It was observed that among the characters influencing Trichome density (-0.797 and -0.809), internodal length (-0.242 and -0.257), fruit length width ratio (-0.249 and -0.254) exhibited strong negative correlation with respect to Fruit and shoot damage. While shoot thickness (0.980 and 0.991) and diameter of fruit (0.426 and 0.445) showed significant positive correlation by fruit and shoot borer. Subsequently, Jassid intensity was showed significant positive correlation with shoot thickness (0.401), while negative correlation was observed with trichome density (-0.275) and fruit length width ratio (-0.232). Furthermore, whitely and hadda beetle number showed negative correlation with shoot thickness (-0.474 and -0.517) and positive correlation with trichome density (0.323 and 0.436), internodal length (0.376 and 0.383).