Incidence of spotted pod borer, Maruca vitrata (Geyer) in Indian bean, lablab purpureus var. Typicus in unprotected conditions

Abstract

An experiment was carried out to screen nine determinate Indian bean varieties viz., Arka Vijay, Arka Jay, Arka Amogh, Arka Soumya, Arka Sambharam, NIB-1, Konkan Bhushan, Tirupathi Local and West Godavari Local were screened to know the infestation of spotted pod borer, M. vitrata under open field conditions revealed that among the nine determinate Indian bean varieties NIB-1(17.75 %) considered as highly resistant. Tirupathi Local was categorized as moderately resistant with 33.00 per cent flower damage. The other seven varieties viz. Arka Soumya, Arka Vijay, Arka Amogh, Arka Sambhram, West Godavari Local, Arka Jay and Konkan Bushan were rated as intermediate resistant to M. vitrata which recorded flower infestation percentage of 52.60 51.94, 50.21, 47.25, 42.64, 42.2 and 41.45 per cent, respectively with respect to the inflorescence damage due to spotted pod borer Maruca vitrata (Geyer).