الفهرس 
Table of ContentsOnly 14 pages are availabe for public view
 |  | from | 157 |  |  |
| | | from | 157 | | |
Abstract
Canola (oilseed rape), Brassica napus (Brassicaceae), is now the third most important source of edible vegetable oil in the world. In Egypt, oil crops make up 1.8% of the total cultivated area of the country. It is a genetically altered and improved version of rape seed, developed through conventional breeding from rapeseed. B. napus, is one of the world’s leading edible oil crops. Its seed contains less than 2% erucic acid and >30µMg-1 of gulcosinolates in the oil free meal. Furthermore, canola oil is lower in saturated fats (5-8%) than any other vegetable oil. The current experiments were conducted at Elserw Agricultural Research Station, Damietta governorate, Egypt during two successive winter seasons, 2014/2015 and 2015/2016 at canola field for the following objectives: I. Survey the main insect pests attacking the canola fields and their associated natural enemies. II. Study the population density of the main insect pests and their associated natural enemies in canola varieties. III. Evaluation the effect of abiotic factors on insect pests and their associated natural enemies in canola varieties. IV. Evaluation the effect of some more safety alternative compounds comparison with synthetic insecticide on reduction percentage of cabbage aphid population infesting canola. V. Assessment the effect of different levels of B. brassicae damage, expressed as infestation percentage on quantity of oil and erucic acid percentage. Results indicated that: 1- The most serious pests of canola were Thrips tabaci, Bemisia tabaci, Brevicoryne brassicae, Plutella xylostella, Emposcae spp and Myzus persicae. 2- Abiotic factors were positively correlated with the population of insect pests of canola during the two seasons of study on all canola varieties. 3- The fatty acids increased than fatty acids in case of infested treatments. 4- The chemical insecticides were more effective in reducing the number of cabbage aphids.