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近几年我县油菜种植面积不断扩大,油菜蚜虫连年发生危害,严重年份减产2—3成,一般年份减产1成左右,是油菜生产存在的主要问题之一。据田间调查,油菜地里往往有两种蚜虫混合发生,即菜缢管蚜和桃蚜,其中以菜缢管蚜(以下简称油菜蚜)发生最为严重,现对其发生和防治作一介绍。油菜蚜除危害油菜外,还危害大白菜、萝卜、菠菜等。成蚜和若蚜刺吸油莱汁液,
In recent years, the planting area of rapeseed in our county has been expanding continuously. Aphids in rapeseed have been harmed year after year. 2-3% of the rapeseed crop has been cut in severe year and about 10% of the normal crop year by year. This is one of the main problems in rapeseed production. According to field surveys, there are often two kinds of aphids mixed in rape fields, namely, aphids and peach aphids, of which vegetables and pipe aphids (hereinafter referred to as rape aphid) occurred the most serious, now its occurrence and prevention for an introduction. In addition to rape aphids harm rapeseed, but also endanger cabbage, radish, spinach and so on. Aphid and if aphid thorn suck oil juice,