共查询到11条相似文献,搜索用时 62 毫秒
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斑喙丽金龟Adoretus ternuimaculatus Waterhouse又名茶色金龟子。我国大多数省(区)有分布。除为害茶树外,还为害油茶、棉、玉米、高粱、豆类、樱桃、苹果、杏、梧桐、枫杨、柳等多种作物和果木。在婺源常见与中喙丽金龟Adoretus sinicusBurmeistes混合发生,且成虫栖息为害较集中,一丛茶树常聚集有数百头成虫在上取食,晚上观察时可听见“嗡、嗡……”的飞行声。国内此虫为害茶的报道甚少,为此,笔者对其作了初步观察。现作一介绍。1形态特征成虫体长9.5~10.5mm,宽4.7~5.3mm,褐或棕褐色,腹部色泽较深。体密被乳白披针形鳞片,光泽较暗淡。… 相似文献
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中喙丽金龟是茶树上一种重要害虫,常在幼龄茶园暴发成灾,致茶树生长衰弱,严重会造成植株死亡;投产茶园受害后茶树树势和茶叶产量受到影响.文章介绍了中喙丽金龟的分布与为害、形态特征以及防治措施,以期为该虫的防治提供参考. 相似文献
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茶小卷叶蛾及其生物防治 总被引:2,自引:0,他引:2
本文简要介绍了茶小卷叶蛾的基本特性及其防治措施,尤其重点介绍了生物防治的方法。生物防治能有效防治小茶卷叶蛾的同时又能克服农残、抗药性、环境污染等问题,是无公害茶叶的生产有效措施。 相似文献
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1990~1998年调查研究结果表明,山西省危害甜菜的金龟子有16种之多。90年代蛴螬对甜菜的危害程度有上升趋势,一般被害率可达10%~15%,严重的被害率达25%~30。防治方法可采用农来综合防治,人工或黑光诱杀及药剂防治等。 相似文献
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Two water management practices, an intermittent irrigation scheme using automatic irrigation system (AI) and a spillover-irrigation
scheme (SI), were compared for the fate and transport of commonly used herbicides, mefenacet (MF) and bensulfuron-methyl (BSM)
in experimental paddy plots. Maximum mefenacet concentrations in paddy water were 660 and 540 μg L−1 for AI and SI plot, respectively. The corresponding values for bensulfuron-methyl were 46.0 and 42.0 μg L−1. Dissipation of the herbicides in paddy water appeared to follow the first-order kinetics with half-lives (DT50) of 1.9–4.5 days and DT90 (90% mass dissipation) of 7.8–11.3 days. The AI plot had no surface drainage, hence no herbicide was lost through paddy-water
discharge. However, SI plot lost about 38 and 49% of applied mefenacet and bensulfuron-methyl, respectively. The intermittent
irrigation scheme using automatic irrigation system with a high drainage gate was recommended to be a best management practice
for controlling the herbicide losses from paddy fields. The paddy field managed by spillover-irrigation scheme may cause significant
water and herbicide losses depending on the volume of irrigation and precipitation. The water holding period after herbicide
application was suggested to be at least 10 days according to the DT90 index. 相似文献
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MAOXueqin SUNGuochang 《中国水稻研究通报》2000,8(3):11-13
Thericeblastdiseasecausedby Magnaporthegrisea(anamorph:Pyriculariagrisea)isoneofthemostseriousdiseasesofriceinChina.Riceblastoccursindifferentdegreeeveryyearandgenerallycausesyieldlossesof10_20 %upto40_50 %inseriousdiseasedregionintheepidemicyear,evenn… 相似文献
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棉花是我国重要的农产品,其质量的好坏直接关系到棉纺企业的加工与出口创汇。因此,国家出台将原来棉花加工企业自行检验改为由专业纤检机构在加工环节提供普遍公证的检验服务;制定和颁布含有棉花纤维强度、细度、成熟度、一致性等反映棉花内在质量指标的新标准;在棉花加工时采用烘干、调湿设备,使棉花水分保持在标准含量的水平,并规范棉包重量等改革。 相似文献
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