author(s)
VK Bhamare, SV Phatak, SC Kumbhar and AS Bade

abstract
Investigations were carried out during Kharif 2015 at Research Farm of Department of Agricultural Entomology, College of Agriculture, Latur (VNKMV, Parbhani) on the influence of ambient weather on seasonal incidence of Helicoverpa armigera, Cydia ptychora and Obereopsis brevis infesting sole soybean and soybean intercropped with pigeonpea. The data revealed that Helicoverpa armigera, Cydia ptychora and Obereopsis brevis were emerged as major insect-pests on late season soybean and soybean intercropped with pigeonpea. The peak activity of H. armigera (6.4 larvae per quadrat), C. ptychora (3.4 larvae per quadrat) and O. brevis (3.8 grubs per quadrat) was registered during 42^nd, 43^rd and 38^th standard meteorological week, respectively on sole soybean. The larval population of H. armigera infesting sole soybean exhibited a positive correlation with minimum temperature, before noon relative humidity and afternoon relative humidity. C. ptychora larval population infesting sole soybean indicated a positive correlation with rainfall while, negative correlation with before noon relative humidity. The grub population of O. brevis infesting sole soybean had a positive correlation with maximum temperature, minimum temperature, before noon relative humidity and afternoon relative humidity. However, on soybean intercropped with pigeonpea the peak population of H. armigera (8.2 larvae per quadrat), C. ptychora (3.6 larvae per quadrat) and O. brevis (2.4 grubs per quadrat) was recorded during 42^nd, 45^th and 38^th standard meteorological week, respectively H. armigera larval population infesting soybean intercropped with pigeonpea demonstrated a positive correlation with minimum temperature and afternoon relative humidity. The larval population of C. ptychora infesting soybean intercropped with pigeonpea indicated a positive correlation with rainfall whereas before noon relative humidity exhibited negative impact on larval population of C. ptychora. The grub population of O. brevis infesting soybean intercropped with pigeonpea had a positive correlation with maximum temperature, before noon relative humidity and afternoon relative humidity.