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甘蔗扁飞虱(Eoeurysa flavcapitata Muir)近年在我地区发生和为害严重。在桂平每年发生面积达1.5—2万亩,占种植面积的10—12％。受害严重的植株比受害轻的锤茎锤度降低7.34％,产量减少12.77—25.61％。据1985—1986年在桂平饲养和系统调查结果,扁飞虱在我地区一年发生4～75代,在气温为25—32℃情况下,全代历期43—65天,其中卵期13—17天,若虫期24～34天,成虫寿命3—10天,产卵前期2～4天。成虫及若虫在春植蔗和宿根蔗或秋植蔗分别出现4个和5个高峰期,其中春植蔗第二高峰期、宿根蔗或秋植蔗第三高峰期开始虫量急增,亦即是第三代后为害加剧。扁飞虱迁移扩散很明显,特别是第二代后,
Eoeurysa flavcapitata Muir has occurred in my area in recent years and is seriously devastating. Occur in Guiping area of 1.5-2 million mu each year, accounting for 10-12% of the area planted. The harmed plants suffered 7.34% less hammering and 12.77-25.61% less yield than the lighter ones. According to the 1985-1986 Guiping breeding and systematic survey results, planthopper occurred in my area 4 to 75 generations a year, at a temperature of 25-32 ℃, the whole generation period of 43-65 days, of which 13 eggs -17 days, nymphs 24 to 34 days, adult life expectancy 3-10 days, pre-oviposition 2 to 4 days. The adult and nymphs showed 4 and 5 peak periods respectively in spring sugarcane and perennial sugarcane or autumn sugarcane, with the number of pests growing sharply in the second peak of spring sugarcane and the third peak of autumn sugarcane or sugarcane in spring That is worsened after the third generation. Planthopper migration and proliferation is obvious, especially after the second generation,