STUDY OF BIOPHYSICAL AND STRUCTURAL MECHANISMS OF STUDY OF BIOPHYSICAL AND STRUCTURAL MECHANISMS OF RESISTANCE IN PIGEONPEA AGAINST POD BORER COMPLEX

Abstract

The maximum H. armigera and M. vitrata infestation was recorded in Pusa-992 (3.72% and 7.90%) and in D2 (1st
week of July) sown crop with infestation of 4.54 and 13.08 per cent, respectively. Whereas, the infestation of pod
fly, M. obtusa was maximum in Manak (2.72%) and 2.58 per cent pod infestation in D2
(1st week of July) sown
crop. The infestation of pod borer complex was negatively associated with pod wall thickness (-0.909**, -
0.739*, -0.870*, -0.834*, -0.840*, -0.705* and -0.745*) and non-glandular type A (-0.730*, -0.945**, -0.768*,
-0.766*, -0.923** and -0.728*) and (-0.751*, -0.759*, 0.766*, -0.852*, -0.802*, -0.895** and -0.832*)
glandular type B (-0.864*, -0.734*, -0.871* and -0.858*) and (-0.729*, -0.705*, -0.730* and -0.845*) density
of pod trichomes of top and middle canopy of the plant. Fat (-0.884**, -0.754*, -0.743*, -0.871* and -0.750*)
phenol (-0.900** and -0.806*) and tannin (-0.792*, -0.812* and -0.763*) content showed negative correlation
with the pod infestation, whereas, crude protein (0.740*, 0.881**, 0.734*, 0.810*, 0.823*, 0.856*, 0.844*
and 0.711*) and total soluble sugar (0.738*, 0.792*, 0.793*, 0.898**, 0.714*, 0.816*, 0.888** and 0.819*)
showed positive association. Based on the results, it can be concluded that the variety Pusa-992 and Manak was
most susceptible to the pod borers.