HOST PREFERENCE AND POPULATION DENSITY OF THE SMALL CABBAGE WHITE BUTTERFLY Pieris rapae (L.) (Lepidoptera: Pieridae)
The study was carried out at the Grda Rasha field station of Agricultural researches which belongs to the college of Agriculture / Salahaddin University - Erbil, Kurdistan Region of Iraq, to investigate the host preference of small cabbage white butterfly, Pieris rapae (Linnaeus, 1758) on some crops of the family Brassicaceae and to estimate popula