Behaviour of grains pea and field pea lines and varieties to the attack caused by Bruchus pisorum L., at the Agricultural Research Station of Podu-Iloaiei, Iasi County

Abstract

Investigations conducted at the Agricultural Research Station of Podu-Iloaiei (1993-1999) have studied the behaviour of grains pea lines and varieties to the attack of pea beetle (Bruchus pisorum L.), which varied between 15.8% and 27.7%. The attack was weak (15.8%- 19.6%) in eight lines and varieties. In field pea lines and varieties, the attack has registered values between 12.5% and 29%, weak attacks being signaled in five lines and varieties (12.5%-17.5%). Climatic factors (temperature and rainfall) and soil management works (sowing period, early harvesting in pea crops and gas treatments with Ultraphos, sulphur, carbon disulphide, etc., before or immediately after storing), diminished the hibernating adult populations during the growth season, under the limit of damaging limit. Pea lines and varieties with weak attacks in grains, produced by Bruchus pisorum L. were recommended for homologation and extension into production.