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采用定点监测、分级调查法对云南河口1.2万hm2香蕉受褐足角胸叶甲(Basilepta fulvipesMotschulsky)的危害情况进行了研究。结果表明:褐足角胸叶甲发生、危害每年有3次以上的高峰期分别为4～5、7～8月和10月、12月至翌年3月为发生、危害的最低期;东部褐足角胸叶甲发生、危害最重,其次是西部及中南部;海拔高度和气候与褐足角胸叶甲的发生危害关系密切,海拔越高,危害率、危害指数越低,雨热同季、高温高湿比较有利于种群繁殖与发生危害。防治试验初步结果表明,参试的3种杀虫剂均有较好的防治效果,其中45%的马拉硫磷(跳丙)乳油1 000倍较好,在抽蕾初期防治可取得较好的防治效果,后期则效果降低或无效。
The risk of 12,000 hm2 banana in Yunnan estuary under the influence of Basilepta fulvipes Motschulsky was studied by using fixed point monitoring and grading survey. The results showed that the occurrence of Hyphantria cunea was 4 to 5, 7 to August and October respectively, with the peak of more than 3 times per year being the lowest and the lowest of the hazard occurring from December to March. Thoracic and pachyrhizi occurred most seriously, followed by the western and central South; altitude and climate and the brown foot angle thoracic and aphthous occurrence of the close, the higher the altitude, the hazard rate, the lower the hazard index, rain and heat Season, high temperature and high humidity is more conducive to population breeding and the occurrence of hazards. The preliminary results of the control experiment showed that the three pesticides tested had better control effect, of which 45% of malathion (jumped ciprofloxacin) was 1 000 times better and could be better controlled in the early stage of pump-drawing The effect of prevention and control, the latter effect is reduced or invalid.