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毛竹蚧虫—蠕须盾蚧的观察研究 总被引:4,自引:0,他引:4
本文报导为害毛竹秆部的主要蚧虫——蠕须盾蚧。经多年来观察研究,在福建省尤溪、沙县、南平、建瓯、上杭等县市的毛竹林中常受该虫为害,严重者毛竹秆受害率达70%—90%。该虫一年发生2代,大量以成虫和少量以卵在雌介壳中越冬,5—6月和9—10月为为害的高峰期,而且世代重叠严重。其天敌发现有日本方头甲等多种;经药剂防治试验结果,以快灭磷、氧化乐果等农药,采用注射法或涂秆法效果显著。 相似文献
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苌楚鸠蝠蛾的生物学特性及防治研究 总被引:2,自引:0,他引:2
苌楚鸠蝠蛾Phassus actinidiae Yang et Wang是福建近年来严重为害猕猴的一种新的蛀干害虫。我们于1984-1989年在建宁县猕猴桃试验站进行研究。该虫一年一代,以卵在树兜的地面越冬,幼虫为害猕猴桃植株韧皮部和髓部,外部形成虫屑包,内部形成蛀道,阻滞养分和水分的正常输送,轻者枝叶发黄,重者风折枯死。除选用抗虫品种外,采用2.5%溴氰菊脂1∶5000液灌注;90%敌百虫晶体1 相似文献
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竹秆红链蚧的生物学特性研究 总被引:3,自引:1,他引:3
竹秆红链蚧是危害毛竹秆部的一种蚧壳虫。竹林一旦发生受害,轻则竹叶干枯,出笋量减少,重则毛竹成片枯死。经观察:该虫在三明市三元区中村乡一年发生一代,以若虫越冬。孕卵期长,各虫态重叠严重。每年5月中旬开始危害,6月中旬危害最烈。 相似文献
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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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福建省武平县马尾松纯林及马尾松混交林占全县有林地面积比例很大。由于纯林的多种因素,致使由以往马尾松毛虫偶灾区变成常灾区。本文根据武平县的气候、环境等因素及松毛虫的发生规律,采用及时预测预报、营造及保护混交林,开展以菌治虫、以鸟治虫等生物防治,结合物理、化学防治等措施,取得了很好的防治效果。 相似文献
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本文研究为害毛竹的竹小蜂的发生发展规律,应用数量化理论Ⅰ,建立了毛竹受害率的预测模型,经复相关系数t检验表明呈极显著相关,并用偏相关t检验和得分值范围比较表明:地形、竹林组成与结构和气候因子是影响竹小蜂发生发展的重要因素,该模型可以预测毛竹被竹小蜂为害的受害率及防治措施. 相似文献
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The wilt disease of Bambusa ventricosa was a serious disease occured in Nanping city, Fujian Province. Thesymptoms of the disease, identification, inoculation, biological characteristics of the causal organism and bionomics of thewilt disease were studied. The species was identified as Nectria ditissirna Tul. at sexual phase, and as Fusarium semitec tum Berk. &Rav. at anamorphic state. The causal organism of wilt disease grew vigorously on the PSA and PSA + 10%decoction of culm media, and formed white coloured colonies. After incubation of 7 days at 28℃ , a great amount of macro-conidia was produced, no stroma and perithecia were formed after 30 days. The stroma and ascospore were only producedunder natural condition. The preference temperature for mycelia growth was between 25 ~ 28 ℃ , and the optimum pH val-ues was at 6 ~ 7. The optimum temperature for conidia and ascospores germination was between 25 ~ 28℃, and the opti-mum pH values was at 6 ~ 7. The high relative humidity ( RH 96.1% ~ 100% ) was necessary for the germination ofconidia and ascospores. The results of experiments showed that the pathogen of the wilt disease overwintered on the soil,and disseminated by winds and rains to infect the wounded stem base of Bambusa ventricosa. The primary infection occurredfrom the last ten days of February or the first days of March. The peak infection occurred from the first ten days of Marchto the second ten days of April during early summer rains. The infection ceased from the second ten days or the last tendays of May. The freeze injury was possibly important factor to induce infection of the wilt disease. 相似文献
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竹秆红链蚧在福建省首次发生大面积为害.以不同农药、不同浓度、不同处理方法进行防治试验,结果表明:以氧化乐果1:20的注射法为最佳组合,杀虫效果达90%,能有效地控制害虫的发生.此法简便易行,在生产上可大量推广应用. 相似文献