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我省为害油菜的蚜虫主要有菜溢管蚜和桃蚜两种,是十字花科主要害虫之一。这两种蚜虫每年可繁殖二、三十代;从早春开始,全年在十字花科蔬菜间转移为害。对油菜的为害主要以刺吸式口器吸食油菜叶片、茎枝、花轴的汁液。苗期密集在叶背及心叶中为害,受害叶片形成褪绿斑点,严重时发黄、卷曲变形,光合作用受阻,生长发育迟缓,以致枯死。嫩茎、花轴受害后变为畸形。角果发育不
Aphids damaging rape in our province mainly include two kinds of aphids and peach aphids, which are one of the major pests of the cruciferae. The two kinds of aphids can breed two or thirties each year; from early spring, year-round transfer of cruciferous vegetables harm. Harm on rape mainly sucking mouthparts rape leaves, stems, flower axis juice. Seedling-intensive leaves in the heart and leaf damage, victim leaves form chlorotic spots, severe yellow, curly deformation, photosynthesis blocked, growth retardation, resulting in dead. Spear stem, flower axis becomes deformed after the victim. Fruit development is not