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《湖北植保》2006,(6):46-47
(题后所列数字为期数∶页数)【病虫预测预报】武汉地区2006年蔬菜主要病虫害发生趋势及防治对策……………………………张原左丛山徐建武等(1∶05)2006年湖北省农作物病虫害发生趋势预测……………………………徐荣钦王利兵周国珍(2∶05)2006年武汉地区蔬菜主要病虫害发生趋势………………………………武汉市蔬菜病虫测报站(2∶08)2006年柑桔主要病虫发生趋势与防治……………朱立萱(3∶05)2006年下半年农作物病虫害发生趋势……………………………彭传华徐荣钦周国珍(4∶11)【综合防治】云梦县水稻直播栽培技术要点及效益分析………………… 相似文献
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蔬菜已成为我省农业的支柱产业 ,随着种植面积的扩大 ,品种的多样化以及设施栽培带来了复种指数的提高等 ,给蔬菜病虫害的发生提供了场所、食源、更由于农业投入品大量的投入 ,带来了病虫抗性的增强 ,越冬 ,夏现象的不明显 ,给蔬菜病虫害防治增加了难度 ,也给蔬菜安全生产带来了极大威胁。1 蔬菜病虫害发生趋势 总趋势 :蔬菜主要病虫害全年都较重 ,上半年以病害为主 ,下半年以虫害为主 ,其中大发生的病虫害有 :豆野螟、节瓜蓟马、蚜虫、甜菜夜蛾、小菜蛾、瓜野螟、斜纹夜蛾、美洲斑潜蝇、病毒病、灰霉病、根结线虫病、番茄晚疫病、十字… 相似文献
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1998年武汉市蔬菜主要病虫害发生趋势分析武汉市蔬菜病虫测报站(430023)张原随着蔬菜种植面积扩大,特别是棚栽蔬菜面积扩大,以及品种结构调整,栽培措施更新,蔬菜南调北运大市场流通,使蔬菜主要病虫害的发生为害,蔓延流行出现了一些新的变化。根据我站历... 相似文献
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《湖北植保》2005,(6):45-47
(题后所列数字为期数:页数)【病虫预测预报】2005年蔬菜主要病虫害发生趋势及防治对策……………………………张原徐建武杨方文(1:08)湖北省2005年3~4月主要作物常发病虫鼠害防治方法………………………………湖北省植保总站测报站(1:09)2005年湖北省农作物病虫害发生趋势预测…………………………罗汉钢徐荣钦王利兵等(2:05)2005年武汉地区蔬菜主要病害发生趋势………………………………………陈先雄徐爱仙(2:08)2005年武汉地区蔬菜主要虫害发生趋势………………………………………陈先雄徐爱仙(2:13)湖北省6~8月份主要农作物常发病虫害的… 相似文献
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随着种植业结构大幅度调整,水改菜、棉改菜面积的逐年扩大,以及耕作制度、品种结构、作物布局有了很大变化,加上气候条件的异常等因素,使蔬菜主要病虫害的发生危害、蔓延流行出现了一些新的变化。我站根据历年系统调查及实际发生情况分析,并参照气象预报,对1994年蔬菜主要病虫害发生趋势作初步预测,供各地参考。 1 蔬菜主要病虫害发生特点与总趋势 相似文献
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新疆奇台县近42a气候变化特征分析 总被引:5,自引:1,他引:4
根据新疆奇台县气象站的气温及降水资料,利用线性趋势函数及M ann-kendall突变检测法分析了该地区近42年的气候变化。结果表明:年平均气温与极端最低气温均呈上升趋势,而极端最高气温呈下降趋势;年降水量呈上升趋势。从季节变化来看,除夏季平均气温呈下降趋势,其它各季平均气温均呈上升趋势,其中以冬季增幅最大,秋季次之;各季降水均呈上升趋势,其中以夏季增幅最大,冬季次之。年平均气温未发生突变,而年降水量在1984年发生由少向多的突变。对气温和降水的异常分析得出,暖温年多发生在上世纪80年代后,冷温年多发生在上世纪60、70年代;多雨年主要在近20年,少雨年则多在上世纪60、70年代。此外,该县近42 a来增暖幅度小于全疆和北疆;增湿幅度大于全疆,小于北疆。 相似文献
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综述了我国苜蓿主要病害的分布和危害、病原学、发生规律、抗性种质材料的遗传筛选和鉴定及综合防治等方面的主要研究进展,并提出了今后的研究方向和发展目标。 相似文献
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Cees Waalwijk Pieter Kastelein Ineke de Vries Zoltan Kerényi Theo van der Lee Thamara Hesselink Jürgen Köhl Gert Kema 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(7):743-754
The re-emergence of fusarium head blight throughout the world and especially in Western Europe prompted a survey of the situation in the Netherlands. To allow for a high throughput screening of large numbers of samples, a diagnostic PCR method was developed to detect the most common species of Fusarium occurring on wheat. Seven primer pairs were tested for their ability to identify isolates of Fusarium avenaceum, F. culmorum, F. graminearum, F. poae, F. proliferatum and Microdochium nivale var. majus and M. nivale var. nivale. Each primer pair only generated a PCR product with the corresponding Fusarium species and all PCR fragments had different molecular sizes. This allowed the generation of these amplicons using a mixture of all seven primer pairs. The robustness of this multiplex PCR encouraged us to screen a large series of isolates collected in 2000 and 2001. In both years 40 fields were sampled leading to a collection of 209 isolates from 2000 and 145 isolates from 2001. The results of the multiplex PCR demonstrated that F. graminearum was the most abundant species in the Fusarium complex on wheat in both years. This is in sharp contrast to reports from the 1980s and early 1990s, which found F. culmorum as the predominant species. Primers derived from the tri7 and tri13 genes, which are implicated in the acetylation and oxygenation of the C-4 atom of the backbone of the trichothecene molecule, were used to discriminate between deoxynivalenol and nivalenol (NIV) producers. The populations of F. culmorum and F. graminearum both showed a slight increase in NIV-producers in 2001. 相似文献
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弹状病毒含有单链负义RNA基因组,寄主范围比较广泛,能侵染无脊椎动物、脊椎动物以及植物等寄主,对人类的健康、农作物产量和自然生态系统造成严重威胁。植物弹状病毒主要根据复制场所分为细胞质弹状病毒属Cytorhabdovirus和细胞核弹状病毒属Nucleorhabdovirus,其基因组由单股负链RNA组成。此外,Dichorhavirus和Varicosavirus病毒属是两个新鉴定的植物弹状病毒属,其特征是具有二分体基因组。本文着重介绍危害我国农作物的几类植物弹状病毒,对它们的病理学、病害流行、基因组信息以及传播媒介进行概述,为中国植物弹状病毒病害的研究提供理论依据。 相似文献
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Variation in pesticide residues in space and time has not been investigated systematically in spite of the large variability found at single scales (e.g. between trees or orchards). Information on variability at different scales will support the development of sampling methods and more reliable prediction of residues. Experiments were conducted to quantify the spatiotemporal variability in initial spray deposit on apple leaves and fruit using a substitute tracer (zinc EDTA chelate). Five hierarchical spatial scales were defined as (1) between orchards, (2) between plots within an orchard, (3) between trees within a plot, (4) between zones within a tree and (5) between leaves/fruit within a zone. Similarly, two temporal scales were defined as (1) between applications within a single year and (2) between years. The initial zinc concentration was approximately log-normally distributed; the variability in initial deposit concentration was greater on leaves than on fruit. The average initial zinc deposition was significantly greater in the top and outside zones than in the middle zones within individual trees. The most important scale for driving residue variability is the within-zone unit-to-unit variation, contributing to 71 and 49% of the observed variability for leaf and fruit samples respectively. Variability at other scales was related to the variation in the tree architecture. The results indicated that stratified sampling on the basis of within-tree zone structures, with the effort focused on within-zone sampling, should be used for the determination of pesticide residues. 相似文献