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采用6种药剂对柑橘木虱田间防效进行试验,结果表明,52.25%高氯·毒死蜱EC1000倍液、4.5%联苯菊酯SC1500倍液、5%高效氯氟氰菊酯EW1500倍液、25%噻虫嗪WG3500倍液、10%吡虫啉EC1500倍液和48%毒死蜱EC800倍液对柑橘木虱具有较好的速效性,施药后1d的总体防效分别为100%、99.88%、99.77%、99.38%、98.02%和94.31%;施药后7d,10%吡虫啉EC1500倍液对柑橘木虱的防治效果最差,为87.9%,其他几种药剂的防效仍维持在90%以上;施药后14d,各处理对柑橘木虱的防效均在75%以下。 相似文献
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通过对柑橘木虱的调查和监测,初步摸清了柑橘木虱在福建顺昌县的分布和发生规律、特点.调查结果表明,本县柑橘产区均有木虱分布,发生高峰期主要集中在8月中、下旬柑橘秋梢抽发期.其防治应重点统一防治柑橘秋梢木虱,以有效控制由其传毒的柑橘黄龙病传播蔓延. 相似文献
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柑橘黄龙病对全球的柑橘产业造成了严重的经济损失,其传播媒介主要为柑橘木虱。在前期研究中利用柑橘木虱对4种芸香科植物的取食偏好结合代谢组学分析筛选出一批可能对柑橘木虱具有引诱效果的挥发性化合物,本研究鉴定了邻氨基苯甲酸甲酯、癸酸、正辛醇、左旋香芹酮、2-环己烯酮、反式-1,2-环己二醇、吡嗪等7种挥发性化合物在0、0.1%、1%、10%4个浓度和10、20、30、40、50、60 min 6个持续时间下对柑橘木虱的引诱效果,并比较了其中5种脂溶性挥发物在各自最优浓度下的引诱效果。试验结果表明,7种挥发物对柑橘木虱都有引诱效果,但是引诱效果与挥发物浓度及持续时间有关。吡嗪、左旋香芹酮、正辛醇、2-环己烯酮、癸酸、邻氨基苯甲酸甲酯和反式-1,2-环己二醇的最佳引诱浓度分别为0.1%、1%、1%、1%、10%、10%、10%。六臂嗅觉仪试验结果显示5种脂溶性挥发物中1%左旋香芹酮的引诱效果高于10%癸酸、10%邻氨基苯甲酸甲酯、1%2-环己烯酮、1%正辛醇及对照(矿物油),但与其他4种挥发物没有显著差异。研究结果可为柑橘木虱引诱剂的开发提供参考,促进柑橘黄龙病的绿色防控。 相似文献
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柑橘生产上叶面肥的使用很普遍?为了评估喷施叶面肥对柑橘新梢期的主要害虫柑橘木虱Diaphorina citri和柑橘潜叶蛾Phyllocnistis citrella发生?为害的影响, 本文分别在养虫笼和网室条件下调查了以上2种害虫对喷不同叶面肥(尿素?复合氨基酸和葡萄糖)砂糖橘苗木的选择和为害, 以及柑橘炭疽病发生情况?试验结果表明:从木虱成虫选择性和产卵两个方面来看, 不同喷施处理的砂糖橘对木虱的吸引作用表现为尿素>复合氨基酸>葡萄糖>清水对照, 其中尿素和复合氨基酸处理吸引作用显著高于对照?喷施3种叶面肥后潜叶蛾为害程度均显著高于对照, 以葡萄糖处理的为害率和受害指数最高?另外, 尿素和复合氨基酸处理苗木的柑橘炭疽病病叶率和病情指数显著高于对照, 复合氨基酸处理病叶率显著高于葡萄糖?说明喷尿素?复合氨基酸叶面肥对柑橘木虱有较强的吸引作用, 同时加重柑橘炭疽病?另外, 与对照相比, 喷施3种叶面肥均能加重潜叶蛾的为害, 尤其是葡萄糖? 相似文献
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为筛选兼具速效性与持效性的柑橘木虱防治药剂,选择6%阿维·噻虫嗪微乳剂、30%噻虫胺悬浮剂、34%啶虫脒·毒死蜱乳油、26.9%石英水剂、2.5%高效氟氯氰菊酯水乳、21%噻虫嗪悬浮剂进行田间药效试验。结果表明,供试的6种杀虫剂中,防治柑橘木虱速效性最好的是21%噻虫嗪悬浮剂,在药后24 h对该虫防效达92.14%;6%阿维·噻虫嗪微乳剂、30%噻虫胺悬浮剂和26.9%石英水在施用后1~5d的防效呈上升趋势,这3种药剂到药后第5天的防治效果在88.81%~94.08%之间;6%阿维·噻虫嗪微乳剂对柑橘木虱的持效性较好,在药后第5天的防效达到94.08%。 相似文献
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一株侵染柑橘木虱的球孢白僵菌的分离及鉴定 总被引:5,自引:0,他引:5
从柑橘木虱虫体分离得到一株具有强致病性的虫生真菌GZMS-28,本文测定了该菌株对柑橘木虱的致病性,并分析了其rDNA ITS基因序列。试验结果表明,该菌株对柑橘木虱具有较强的致病性,浓度为1.0×108个/mL的分生孢子悬浮液处理柑橘木虱成虫7d后,其校正死亡率达到95.7%。菌株GZMS-28的培养特征与白僵菌属球孢白僵菌较为一致,其rDNA ITS序列与GenBank中白僵菌属多个球孢白僵菌菌株的对应序列相似性达到99%以上,因此将菌株GZMS-28鉴定为球孢白僵菌Beauveria bassiana。 相似文献
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柑橘木虱Diaphorina citri Kuwayama既是柑橘上的重要害虫,又是柑橘黄龙病的传播虫媒,对我国柑橘产业存在潜在威胁。进一步调查柑橘木虱的寄生性天敌资源,明确其种类和鉴别特征,对筛选优势天敌种类并开展生物防治应用具有重要意义。本文调查结果有柑橘木虱初寄生蜂2种,分别为亮腹姬小蜂Tamarixia radiate(Waterston)、阿里食虱跳小蜂Diaphorencyrtus aligarhensis(Shafee,Alam et Argarwal);重寄生蜂4种,分别为新种小斑塔姬小蜂Tamarixia micromacula Wang et Huang,sp.n.(姬小蜂科Eulophidae)、沃氏卡棒小蜂Chartocerus walkeri Hayat、黄食虱跳小蜂Psyllaphycus diaphorinae Hayat(中国新记录属、新记录种)、恩蚜小蜂Encarsia sp.♂。记述了寄生性天敌分类鉴别的主要形态特征及其发生概况,描述了新种小斑塔姬小蜂,提供了寄生性天敌的形态特征照片。新种模式标本及其他研究标本保存于福建农林大学植物保护学院。 相似文献
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Yueping Yang Mingdu Huang G Andrew C. Beattie Yulu Xia Gecheng Ouyang Jinjun Xiong 《国际虫害防治杂志》2013,59(4):343-352
Abstract The Asiatic citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae) is a major pest of citrus in China. Its status derives, not from the damage it causes, but from its role as the only known vector in China of huanglongbing, a phloem-limited bacterial disease of international importance. The disease can devastate orchards within a few years of planting. It also poses a major threat to endangered indigenous citrus germplasm in Asia and Australasia. The distribution, biology, ecology and control of the psyllid in China are reviewed in these contexts. Constraints and challenges related to control of the vector in China are discussed. 相似文献
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BACKGROUND: In the present investigation, the effect of Candidatus Liberibacter asiaticus (Las), a bacterium considered to be responsible for causing huanglongbing (HLB) disease in citrus, on the physiology of its vector, the Asian citrus psyllid (ACP) Diaphorina citri Kuwayama, was determined. Specifically, the effects of Las infection on the susceptibility of ACP to selected insecticides were determined. Furthermore, total protein content and general esterase activity were quantified in Las‐infected and uninfected ACP to gain insight into the possible mechanism(s) responsible for altered susceptibility to insecticides owing to Las infection. RESULTS: LC50 values were significantly lower in Las‐infected than in uninfected ACP adults for chlorpyrifos and spinetoram. Furthermore, there was a general trend towards lower LC50 values for three other insecticides for Las‐infected ACP; however, the differences were not statistically significant. Total protein content (µg mL?1) was significantly lower in Las‐infected (23.5 ± 1.3 in head + thorax; 27.7 ± 1.9 in abdomen) than in uninfected (29.7 ± 2.1 in head + thorax; 35.0 ± 2.3 in abdomen) ACP. Likewise, general esterase enzyme activity (nmol min?1 mg?1 protein) was significantly lower in Las‐infected (111.6 ± 4.5 in head + thorax; 109.5 ± 3.7 in abdomen) than in uninfected (135.9 ± 7.5 in head + thorax; 206.1 ± 23.7 in abdomen) ACP. CONCLUSION: Susceptibility of ACP to selected insecticides from five major chemistries was greater in Las‐infected than in uninfected ACP. The lower total protein content and reduced general esterase activity in Las‐infected than in uninfected ACP may partly explain the observed higher insecticide susceptibility of Las‐infected ACP. Copyright © 2010 Society of Chemical Industry 相似文献
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Dhana Raj Boina Ebenezer O Onagbola Masoud Salyani Lukasz L Stelinski 《Pest management science》2009,65(8):870-877
BACKGROUND: Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, transmits the causal bacteria of the devastating citrus disease huanglongbing (HLB). Because of the variation in spatial and temporal uptake and systemic distribution of imidacloprid applied to citrus trees and its degradation over time in citrus trees, ACP adults and nymphs are exposed to concentrations that may not cause immediate mortality but rather sublethal effects. The objective of this laboratory study was to determine the effects of sublethal concentrations of imidacloprid on ACP life stages. RESULTS: Feeding by ACP adults and nymphs on plants treated daily with a sublethal concentration (0.1 µg mL?1) of imidacloprid significantly decreased adult longevity (8 days), fecundity (33%) and fertility (6%), as well as nymph survival (12%) and developmental rate compared with untreated controls. The magnitude of these negative effects was directly related to exposure duration and concentration. Furthermore, ACP adults that fed on citrus leaves treated systemically with lethal and sublethal concentrations of imidacloprid excreted significantly less honeydew (7–94%) compared with controls in a concentration‐dependent manner suggesting antifeedant activity of imidacloprid. CONCLUSIONS: Sublethal concentrations of imidacloprid negatively affect development, reproduction, survival and longevity of ACP, which likely contributes to population reductions over time. Also, reduced feeding by ACP adults on plants treated with sublethal concentrations of imidacloprid may potentially decrease the capacity of ACP to successfully acquire and transmit the HLB causal pathogen. Copyright © 2009 Society of Chemical Industry 相似文献