病虫的越冬习性与生态防治

• 作 者: 李翠英
• 机 构: 湖南省沅江市农业局,
• 出 处: 新农村
• 发表日期: 2015年11期
• 关键词: 病虫 越冬习性 幼虫 禾本科杂草 休眠状态 水稻害虫 生态防治 进化过程 黑尾叶蝉 卵孵化 成虫 三化螟 看麦娘 二化螟 稻瘿蚊 作物 玉米 幼芽 土壤 台湾

冬季,当日均气温下降到15℃左右,大多数作物病虫陆续进入休眠状态,在长期的进化过程中,形成了形形色色的越冬本领,掌握病虫的越冬习性,有针对性地开展生态防治,能收到事半功倍的效果。1.病虫的越冬习性(1)水稻害虫三化螟以幼虫在禾蔸里越冬,二化螟、大螟、台湾稻螟等除20%左右的老熟幼虫在玉米、甘蔗、茭白等茎秆和禾本科杂草里越冬外,还有80%左右是在禾蔸或禾秆里越冬的;稻椿象是以成虫

In winter, when the average daily temperature dropped to about 15 ℃, most of the crop pests and worms went into dormancy one after another. During the long-term evolution, all kinds of overwintering skills were formed, the overwintering habits of pests and diseases were mastered, and the ecological control was carried out in a targeted manner. Can receive a multiplier effect. 1. pest habit of overwintering (1) rice pest thrips to larvae in the winter wintering larvae, Sesamia inferens, Sesamia inferens, Taiwan rice borer in addition to about 20% of mature larvae in corn, sugar cane, Culms and grass weeds in the wintering, there are about 80% of the wintergrass or straw in the wintering;