摘要 : Investigations were carried out on seasonal incidence of gram pod borer, <i>Helicoverpa armigera</i> (Hubner) on greengram during <i>kharif</i>, 2008 at College Farm, Junagadh Agricultural University, Junagadh. The pest appeared w... 展开 Investigations were carried out on seasonal incidence of gram pod borer, <i>Helicoverpa armigera</i> (Hubner) on greengram during <i>kharif</i>, 2008 at College Farm, Junagadh Agricultural University, Junagadh. The pest appeared with population density of 0.34 larvae per plant during 4th week after sowing (31st standard week) and reached to a peak of 3.42 larvae per plant in 37th standard week (10th week after sowing). Among the weather parameters, minimum temperature (r=-0.557) and evening relative humidity (r=-0.583) exhibited highly significant negative correlation with the gram pod borer population. Rest of the weather parameters were nonsignificantly correlated with the pest population. 收起