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油菜缢管蚜又称萝卜蚜,是为害油菜蚜虫的重要种类。属同翅目蚜科。主要为害十字花科蔬菜,偏嗜白菜和芥菜型油菜。并传播多种病毒。一、发生规律。缢管蚜一年可发生10～20代左右,四季都可繁殖,世代重叠,生活史错综复杂。无明显越冬现象。以日平均温度18～26℃,相对湿度80%左右最适合其发生,对环境干扰的忍耐力随发育过程明显增加,其中无翅型比
Rape 缢 tube aphid, also known as radish aphid, is an important species of rape aphids. Homology Aphid family. The main harmful cruciferous vegetables, partial preference for Chinese cabbage and mustard-type rape. And spread a variety of viruses. First, the law occurs. Tube aphid can occur about 10 to 20 generations a year, all seasons can be multiplied, overlapping generations, life history is complicated. No obvious winter phenomenon. The average daily temperature of 18 ~ 26 ℃, relative humidity of about 80% of the most suitable for its occurrence, the endurance of environmental disturbance significantly increased with the development process, in which the wingless ratio