Population dynamics of potato white grubs in Shimla hills

Soil sampling for white grubs in Shimla hills revealed high population of Brahmins coriaces (Hope) representing all stages. Pupae were found in the soil during April followed by adults in May and eggs in June–July. Larvae were present in the soil from July to April. Third instar grubs caused damage through September–October and over wintered in earthen cells up to April. Adult emergence begins in May, maximun being in mid June on Polygonum sp.