Field evaluation of chilli (Capsicum annuum L.) entries for infestation by thrips, Scirtothrips dorsalis Hood.

摘要

Screening of available germplasms for resistance against any pest is the most crucial phase in host plant resistance studies. Incidence of thrips on different chilli entries was studied in the field during 2008 on 23 entries evaluated for thrips infestation. Mean population of thrips ranged from 0.13 to 1.48 thrips/leaf and the corressponding damage score was zero (11 entries) to a maximum of 3.6 (Byadgi kaddi i.e. more than 50 per cent of leaves showing curling symptom). The per cent leaf curling ranged from 0 to 84 in highly susceptible entry Byadgi kaddi. Entries CA6, BVC 47, KNG 1 and CA 12 recorded less number of thrips per leaf, with no curling symptoms and were designated as promising and resistance to thrips infestation.