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应用性诱剂对福建甘薯蚁象的监测与防治研究 总被引:1,自引:0,他引:1
为了明确甘薯蚁象的发生情况,2009、2010年采用性诱剂诱集的方法对福建福州和莆田甘薯蚁象的发生情况进行了监测,2011年对性诱剂的诱捕器和放置密度进行了比较研究。结果表明,不同年份甘薯蚁象的发生高峰期不尽相同,总体上以7-10月为发生最严重的时期;在连年种植、管理粗放的甘薯田块蚁象发生严重。商品黄色塑料筒诱捕器的诱集效果优于自制漏斗型瓶装诱捕器;但是自制漏斗型瓶装诱捕器较为实用;不同厂家的诱芯田间诱虫效果差异不明显;每667 m 2放置3个诱芯可以有效地诱集蚁象。性诱剂诱捕区与非诱捕区相比,危害明显减轻,甘薯产量明显增加,因此,采用性诱剂诱捕的措施可以减轻甘薯蚁象的危害。 相似文献
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甘薯小象甲是福建省甘薯生长期和贮藏期的重要害虫,以幼虫蛀食薯蔓和薯块为主,该虫为害隐蔽,单一防治效果不理想,损失率一般为20%~30%,对翔安区甘薯生产为害极大。通过性诱剂监测甘薯小象甲田间虫口密度消长情况,分析了甘薯小象甲在翔安区的世代与越冬特性等发生特点,同时比较了不同农田类型及不同甘薯品种小象甲发生为害动态差异性。研究结果表明:甘薯小象甲在厦门市翔安区的发生特点为越冬基数旱地(138.56只/m2)大于水田(98.56只/m2),越冬成虫中雌虫比例高于雄虫;株为害率旱地、农改地高于水田,分别为61.67%、48.33%、20%;为害高峰期为每年10—11月;主栽品种‘潮薯13’为害率高于‘配26’。 相似文献
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PTD-Cry3Aa原核融合表达产物对甘薯小象甲的活性研究 总被引:1,自引:0,他引:1
为探讨TAT PTD对苏云金杆菌鞘翅目特效基因CryAa是否具有协同作用,本试验在实现了融合基因TAT PTD-Cry3Aa大肠杆菌原核表达的基础上,以甘薯小象甲为生测对象测定了原核表达产物PTD-Cry3Aa与Cry3Aa的毒力。结果表明,用大肠杆菌表达的Cry3A和PTD-Cry3Aa包涵体初提物均对甘薯小象甲成虫和幼虫有杀虫活性,且表现出一定毒力增效作用,对成虫的增效倍数为2.01倍,对幼虫的增效作用更加明显,达到3.19倍。这一研究结果对于甘薯小象甲的生物防治研究以及转基因抗虫甘薯的研究具有重要的指导作用。 相似文献
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Yield performances of apical shoot cuttings of sweet potato (Ipomoea batatas) obtained from crops raised 2 or 4 times recurrently through vines, were compared with those obtained from tubers. The recurrent use of vines as planting-material did not show any marked variation in market-grade tuber yield, but it significantly decreased vine yield and increased weevil infestation in tubers. Cultivars ‘Cross-4’, ‘RS-5’ differed significantly in performance 相似文献
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Yvette A. Jackson Mark F. Williams Lawrence A. D. Williams Kisha Morgan Flona A. Redway 《Pest management science》1998,53(3):241-244
A series of amides and esters of substituted benzo[b]furan-2-carboxylic acids have been synthesised, and their activity against adult sweet potato weevils, Cylas formicarius elegantulus (Summer) studied. The topical insecticidal potency of these compounds was compared in acetone solution and in a mixture of piperonyl butoxide (PB) and acetone (0·05+99·95 by volume). The compounds were much more active when administered in the acetone/PB mixture, and exhibited 48-h LD50 values ranging from 1·7 to 26·6 μg per insect. The most active compound, 2-(3,5-dimethylpyrazol-1-ylcarbonyl)-6-methoxy-3-methylbenzofuran, was equiactive with technical grade dimethoate (in acetone/PB) on a weight basis. © 1998 SCI 相似文献
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Panjing Liu Xiaofang Zhang Rongyan Wang Shulong Chen Tao Zhang 《Pest management science》2023,79(10):3504-3510