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黄甜竹基夜蛾生物学特性及其防治 总被引:2,自引:0,他引:2
基夜蛾Kumasiakumaso(Sugi)是近年来福建笋用林产区出现的一种危害黄甜竹(Acidosasaedulis)的新害虫,在福建每年发生1代,部分卵在竹林残留笋箨中越冬,3月中旬开始孵化.幼虫共5龄,历期25-35d,主要以3-5龄幼虫为害,蛹期17-25d.5月中、下旬为成虫羽化高峰期,此时成虫有较强的负趋光性.成虫于夜间交尾,交尾后每雌产卵5-58粒.成虫平均寿命为5.8d,雌雄性比约为1.34∶1.在低龄幼虫阶段喷施氯氰菊酯或甲氰菊酯1∶800倍液,防治效果可分别达到92.09%和76.81%;在出笋时喷撒少量林丹粉可防治母笋上的害虫;采用灯光诱杀和人工捕杀,也可有效防治基夜蛾. 相似文献
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报道了怀集县危害茶秆竹竹笋的淡竹笋夜蛾、笋秀禾夜蛾和竹笋禾夜蛾等3种夜蛾科昆虫的形态特征、生物学习性和发生规律,为其综合防治提供了依据。 相似文献
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基夜蛾是黄甜竹林间最重要的害虫,为害率高达90%,且为害严重,退笋率也高达60%~70%。本文在总结前人研究的基础上,初步探讨了出笋时间、退笋时间、出笋率与退笋率的规律性。同时还描述了为害症状、为害规律、蛀食习性,提出一些防治措施与建议,以便指导生产实践。 相似文献
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黄甜竹竹笋夜蛾综合防治试验研究 总被引:3,自引:0,他引:3
The silvicultural, chemical and biological measures were employed respectively to control the larva ofKumasia kumaso (Sugi) of Acidosasa edulis. The silvicultural measures mainly included weeding & deeply bury-ing, weeding combined with burning , weeding & deeply burying combined with DDVP. And the biological measuresincluded spraying with two kinds of B. t (made respectively in Jianou and Fuqing), Bacillust huringiensis (16000IU/mg), AcNPV etc. And the chemical measures included spraying with 80% DDVP E. C, 40% Omethoate E. C,Shachongguang or Lindane 1500 × and 1 1000 × in 1999, and 17.5% Imidan E.C, 5% Cypermethrin E.C,20 % Fenpropathrin E. C, 20 % Baibusi E. C 1 800 × and 1 1500 × in 2000. the results showed as follow1. In silvicultural measures, different treatments have no remarkable influence on the experiment results, but it canimprove the hygienic condition.2. In biological measures , different treatments have no remarkable influence on the experiment results.3. In chemical measures, 1 500 of Lindane was adapted to eliminate the larva in the mother shoots with the deathratio amounting to 91.10% What' smore, 20% Fenpropathrin E. C 1 800 × , 5% Cypermethrin E. C 1 800 × ,20% Baibusi E. C 1 800 × are also adapted to generalize in forestry with the death ratio amounting to 92.09%,76.81%, 75.74 % respectively. 相似文献
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应用比较频数法 ,结果表明基夜蛾幼虫在林间的空间分布型为 Neyman分布 ,实测χ2 =8.30 7<χ20 .0 5=9.448.根据各种聚集度指标 ,测定结果为幼虫在林间呈聚集分布 .根据各样地 M* 和 x值作线性回归得 M* =0 .1 931 + 1 .40 37x,说明基夜蛾幼虫在林间属聚集分布 ,分布的基本成份是个体群 .将各样地平均密度 x和方差 S2作幂法则得 S2 =1 .5 4 1 6x1.10 98,说明基夜蛾幼虫在一切密度下都是聚集的 ,而且聚集度随着种群密度升高而增加 .同时计算了林间调查的理论抽样数 ,列出了序贯抽样分析表 相似文献
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