共查询到19条相似文献,搜索用时 250 毫秒
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<正>为筛选烟草菌核病的防治药剂,吉林省延边农科院等单位研究人员采用生长速率法测定了11种杀菌剂对烟草菌核病菌的室内毒力,对其中5种抑菌效果好的药剂采用茎叶喷雾法进行了田间防效试验。结果表明,400g/L嘧霉胺悬浮剂、46%多·春·氟吡菌酰胺可湿性粉剂、20%腈菌唑乳油、25%嘧菌酯悬浮剂、50%春雷·多菌灵可湿性粉剂对烟草菌 相似文献
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橡胶树白粉病苗圃防治试验 总被引:1,自引:1,他引:0
为了给田间筛选出防治橡胶树白粉病的新药剂,对咪鲜胺、氟硅唑、十三吗啉、三唑酮、硫磺粉等5种杀菌剂在发病苗圃进行常规防治试验。结果表明:药后7天,95%硫磺粉可湿性粉剂最好,防效达到83.0%,与其他4种药剂相比有极显著的差异性;75%十三吗啉乳油次之,防效达到60.2%;40%氟硅唑乳油、15%三唑酮可湿性粉剂和45%咪鲜胺微乳剂的防效较差,防效均在50%以下。药后30天,防效最好的仍是95%硫磺粉粉剂,防效为84.1%,其次是75%十三吗啉乳油,防效为78.2%,40%氟硅唑乳油的防效为69.1%,3种药剂无极显著差异,防效最差的是45%咪鲜胺微乳剂为33.0%。初步结论表明,95%硫磺粉可湿性粉剂仍为苗圃防治橡胶树白粉病的较好药剂,75%十三吗啉乳油和40%氟硅唑乳油可进一步开发利用。 相似文献
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小麦白粉病是兴化市戴南镇小麦种植中的常发性病害,在小麦白粉病发病初期施用适当的杀菌剂能有效控制该病的流行为害。本试验选择了5种杀菌剂,设计了7个处理,适期开展对小麦白粉病的防治效果研究。结果表明,药后病情稳定,30%醚菌酯·氟环唑SC 600 mL/hm2、36%烯肟·氟环唑SC 300 mL/hm2对小麦白粉病防效理想,病叶防效分别达95.61%、93.32%,病指防效分别高达98.22%、96.77%;40%环丙唑醇SC 180 mL/hm2对小麦白粉防效较为理想,病叶防效、病指防效分别为79.66%、85.34%,3种药剂可作为戴南镇防治小麦白粉病主推药剂大面积推广使用。 相似文献
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两个黄瓜品种对白粉病的抗性遗传分析 总被引:11,自引:1,他引:10
以美国的黄瓜抗病自交系WIS2757与津研2号自交系及相关杂交后代为材料,采用喷雾接种法,在空调温室内进行了黄瓜抗白粉病(Sphaerotheca fuliginea)遗传规律的研究。结果表明,WIS2757对白粉病的抗性基因模式为RRssii,即抗性由1个隐性主效基因s,1个显性加强基因R和1个隐性基因i决定。津研2号与WIS2757抗性的差异主要在于R基因的差异,即津研2号的基因型模式为rrssii,抗性由1个隐性主效基因s和1个隐性基因i决定。感病亲本的基因组成为RRSSII。 相似文献
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草莓抗白粉病生理生化指标研究 总被引:7,自引:3,他引:4
为研究不同草莓品种对白粉病的抗性,选取5种对白粉病抗性不同的草莓品种为试材,测定草莓叶片中叶绿素和可溶性糖含量以及苯丙氨酸解氨酶(PAL)、过氧化物酶(POD)、多酚氧化酶(PPO)和超氧化物歧化酶(SOD)活性变化。结果表明,草莓叶片的叶绿素含量及POD、PAL、PPO活性随品种白粉病抗性的增强而增加,SOD活性随品种抗白粉病能力增强而降低;可溶性糖含量随品种白粉病抗性的增强无明显变化规律。进行方差分析得到不同品种供试材料的叶绿素含量、PPO活性、PAL活性差异极显著,可以用叶绿素含量、PPO活性、PAL活性这些生理生化指标来衡量不同草莓品种对白粉病抗性强弱。 相似文献
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Search for novel genes for resistance to powdery mildew (Sphaerotheca fuliginae) in cucumber (Cucumis sativus) 总被引:1,自引:0,他引:1
Summary The current powdery mildew (Sphaerotheca fuligninea) resistant cucumber varieties suffer from leaf chlorosis during autumn, winter and early spring cultivation in the Netherlands. Therefore screening was carried out for novel powdery mildew resistance genes. From 177 accessions, derived from different sources, 108 accessions proved to be partially resistant to S. fuliginea. Crosses were made with 53 resistant accessions to distinguish the presence of novel genes. It is likely that the accessions C. sativus 2145, C. sativus LV 41, PI 188807, Vladivostokij, White and Yellow 1 have one or more recessive powdery mildew resistance genes, different from powdery mildew resistance genes of the line NPI, which was used for variety breeding. Powdery mildew resistance tests with S. fuliginea give similar results in different regions of the world.Abbreviations pmr
powdery mildew resistance 相似文献
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宁夏压砂甜瓜白粉病病原菌初步鉴定 总被引:1,自引:0,他引:1
【目的】初步鉴定宁夏干旱带压砂甜瓜主栽品种“玉金香”上白粉病病原菌。【方法】通过观察压砂甜瓜白粉病病原菌的分生孢子、菌丝、分生孢子梗、萌发管、纤维状体显微形态特征进行初步鉴定【结果】宁夏干旱带压砂甜瓜主栽品种“玉金香”上白粉病病原菌初步鉴定为单囊壳属单囊壳白粉菌(Sphacelotheca fuliginea)。【结论】囊壳属单囊壳白粉菌侵染是造成宁夏干旱带压砂甜瓜主栽品种“玉金香”上白粉病病因。 相似文献
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为寻找有效防控苹果白粉病的措施,采用普查和定点调查相结合的方法,定期调查苹果园内白粉病的发生时期、为害程度。通过田间防治试验,对生物制剂、诱抗剂和高效化学药剂的防治效果进行评价。结果表明,苹果白粉病春季于4—5月发病,秋季于9月左右发病;且‘华硕’发病较‘富士’重。防治苹果白粉病,生防制剂8%嘧啶核苷酸类抗菌素可湿性粉剂防治效果较好(75.27%),其次是10%多抗霉素可湿性粉剂,防效为62.09%。3种诱抗剂对苹果白粉病防治均有一定的效果,50μg/mL水杨酸处理效果最好,达66.85%;草酸仅高浓度处理的防治效果超过50%;5%氨基寡糖素水剂2000倍处理效果与50μg/mL水杨酸处理效果接近,为65.26%。供试的5种常用化学制剂中,50%丙环唑乳油防治白粉病效果最好(98.59%),其次是10%苯醚甲环唑水分散粒剂(92.80%),5%己唑醇悬浮剂、30%啶氧菌酯悬浮剂和40%腈菌唑悬浮剂防治效果也均在80%以上。试验结果可对后期苹果病虫害综合防治技术体系的集成与示范提供技术指导。 相似文献
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Summary Visual assessment, black & white image analysis and colour image analysis of the severity of powdery mildew (Sphaerotheca fuliginea) infection on leaves of cucumber (Cucumis sativus) were compared. The extent of infection with powdery mildew was expressed as the number of spores per cm2. Statistical treatment of the data showed colour image analysis to be superior to the other two methods of evaluation. Major veins, light reflections and variations in the colour of leaves can degrade the accuracy of colour image analysis somewhat. These problems are, however, surmountable. Colour image analysis qualifies as a valuable new tool for accurate, objective, reproducible and detailed quantitative assessment of disease on leaves of plants.Abbreviations H
hue
- I
intensity
- IA
image analysis
- PM
powdery mildew
- S
saturation 相似文献
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The inheritance mechanism by which summer squash (Cucurbita pepo L.) suppresses powdery mildew (caused by Sphaerotheca fuliginea) sporulation was studied by analysis of the sporulation yield per colony, measured spectrophotometrically at 700 nm. The value of the optical density (LOD) was used as the criterion for the pathogen sporulation. Three breeding lines of summer squash were used: Straightneck powdery mildew resistant (SNP), Benning's Green Tint (BGT) and Sihi Lavan (SLA), each differing in its susceptibility to powdery mildew. Cultivar SNP (resistant) was crossed with SLA (susceptible) or BGT (moderately susceptible) to generate F1 F2 and backcross populations. Continuous distribution was observed and joint scaling effect tests indicated that the additive-dominant model was adequate. Narrow-and broad-sense heritability estimates for BGT × SNP were 0.74 and 0.85, respectively, and for SLA × SNP both were 0.79. These results indicate that it should be possible to select C. pepo populations on which S. fuliginea has low sporulation, and which consequently will exhibit quantitative resistance. 相似文献
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