جستجوی مقالات مرتبط با کلیدواژه « okapi » در نشریات گروه « گیاهپزشکی »

One of the most important and damaging pests of canola is cabbage aphid Brevicoryne brassicae L. This research was carried out to assess the damage of the pest in a randomized complete block design. The results showed that the maximum mean number of aphids per surface unit (10 cm branch length of the flowering branch) is 367.88±27.88, 439.75±36.13, 187.75±10.10 and 274.00±27.68 respectively in West Azarbaijan, Markazi, Fars and Isfahan provinces on Hydromel, Ahadi, Talaiyeh and Okapi varieties. It causes 37%, 35.5%, 25.1% and 22.9% reduction of rapeseed yield.