Canola plantations are considered as an important r eservoir of several arthropod pests and natural ene mies. Two
canola cultivars (Serw and Bactol) were cultivated during 2011/2012 growing season at Assiut Governora te.
Sixteen arthropod species belonging to 12 families and 6 orders, rather than the predatory true spider were
recorded. The collected species were divided into: 7 phytopahgous; 5 predators; 2 parasitoids and 2 be neficial
species. The cabbage aphid Brevicoryne brassicae L. ; the peach aphid Myzus persicae (Sulz.) and their parasitoids
Diaeretiella rapae (McIntoch) and Praon nicans (Mac kauer) in addition to thrips, Thrips tabaci Lind. c onstituted
the most frequent, dominant and abundant species inhabiting canola plantations. The phytophagous group
constituted more than 85%, while the predatory one's constituted less than 14%. The abovementioned species were
found to be active from the last week of February till harvesting after (April 9). Concerning the aphi d parasitism,
the first appearance of aphid parasitized mummies b y D. rapae and/or P. nicans was recorded in the sec ond half of
March. The greatest parasitism percentage was recor ded on April 9 with an average of 79.5% and 77.58% on Serw
and Bactol cultivars, respectively. Both of the tested cultivars were appeared as susceptible (S) to o nion Thrips T.
tabaci and showed different resistance categories t o aphid species. This study needs more attention by plant
breeders to transfer genes responsible for resistan ce to the newly produced and/or improved cultivars.