Vol. 4, Issue 1 (2019)
Seasonal incidence of major insect pests on soybean and their correlation with abiotic weather factors
Author(s): Sonule GP, More DG, Bokan SC
Abstract: Field experiment was conducted during Kharif 2017 at the farm of All India Coordinated Research Project on Soybean, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (Maharashtra) to study seasonal incidence of major insect pests on soybean and their correlation with abiotic weather factors. The incidence of leaf miner, A. modicella (maximum 5.15 per cent damaged leaves/plant during 30th SMW), S. litura (maximum 1.20 larvae/mrl in 36th SMW) and H. armigera (maximum 1.40 larvae/mrl in 36th SMW) was very low/negligible. The girdle beetle, O. brevis incidence started in 31st SMW by recording 3.85% infestation which at harvest reached 14.10%, whereas stem tunneling observed due to stemfly at physiological maturity was 32.04%. Semiloopers, G. gema, A. janata, C. acutarecorded a peak of 2.80 larvae/mrl during 35th SMW. On the basis of observations and correlation study of insect incidence in relation to weather factors, infestation of O. brevis in relation to bright sunshine hours (r=0.543*) was positively significant and wind velocity (r=-0.899**) was negative highly significant.