Study biological and reproductive parameters of cabbage aphid Brevicoryne brassicae, on seven canola cultivars under greenhouse conditions

Cabbage aphid, Brevicoryne brassicae (L.), is one of the most important pests of the canola in different parts of Iran. This pest causes significant damage on leaves, stems, flowers and pods of canola. In this project, the effect of seven canola cultivars (Okapi, Licord, Talayeh, Modena, Tasilo, Hyola308 and Hyola401) was studied on developmental time and reproductive parameters of B.brassicae under greenhouse conditions (20 ±2 °C, 50 ± 5% RH and 16 light: 8 darkness). Base on the results, Hyola401 and Hyola308 hybrids showed the highest value of intrinsic rate of increase ( ) and shortest duration of immature stage, so they were the most suitable hosts for the pest, whereas Okapi, Talayeh and Tasilo cultivars showed the lowest value of  and the longer duration of immature stage and were unsuitable hosts for development and reproduction of the pest under greenhouse conditions, therefore they are recommended for use in integrated management of the cabbage aphid.