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氯虫苯甲酰胺20%悬浮剂和茚虫威15%乳油对水稻纵卷叶螟药效试验 总被引：1，自引：0，他引：1
水稻纵卷叶螟在我县已连续多年大发生,为了有效地控制纵卷叶螟的为害,寻找理想药剂,我们对美国杜邦公司提供的氯虫苯甲酰胺20%悬浮剂和茚虫威15%乳油防治在水稻纵卷叶螟上进行了防效试验。试验表明,氯虫苯甲酰胺20%悬浮剂10mL/667m^2和茚虫威15%乳油12mL/667m^2对水稻纵卷叶螟有比较好的防效,药效相对较长,药后14d在80%以上。 相似文献
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该文探讨生物杀虫剂30亿PIB/mL甘蓝夜蛾NPV悬浮剂对水稻二化螟的防治效果和田间应用技术。试验结果表明:供试3种生物农药对水稻二化螟均有一定的防效,其中,30亿PIB/mL甘蓝夜蛾NPV悬浮剂1 200 mL/hm~2防治水稻二化螟杀虫效果、保苗效果均达90%以上,与对照药剂20%氯虫苯甲酰胺悬浮剂150mL/hm~2防效相当;16 000IU/mL苏云金杆菌可湿性粉剂6 000 g/hm~2防治水稻二化螟的杀虫效果、保苗效果达80%以上;100亿孢子/mL短稳杆菌悬浮剂1800 mL/hm~2防治水稻二化螟杀虫效果、保苗效果在70%以上。不同处理间防效差异显著。3种不同生物药剂在试验剂量范围内对非靶标天敌安全,对水稻生长安全。30亿PIB/mL甘蓝夜蛾NPV悬浮剂是生物杀虫剂,对水稻二化螟防效好,而且具有低毒、无残留、不易产生抗药性等优点,对今后发展无公害食品有很好的促进作用,具有广阔的推广应用前景。 相似文献
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氯虫苯甲酰胺对稻纵卷叶螟的防效及对稻田有益节肢动物的安全性评价 总被引：16，自引：0，他引：16
研究了20%氯虫苯甲酰胺悬浮剂对稻纵卷叶螟的防效及对稻田常见有益节肢动物的安全性。室内毒力测定结果显示：将20%氯虫苯甲酰胺悬浮剂稀释3 000、6 000倍浸渍水稻叶片,接稻纵卷叶螟幼虫24 h死亡率在40%左右, 96 h死亡率达100%。稻田小区和大面积示范试验结果显示：药后14 d,氯虫苯甲酰胺对稻纵卷叶螟的防效分别为90.59%、97.07%,高于药后4、7 d的防效。其防效好于氟虫腈、虫酰肼+辛硫磷。田间与施药前相比,药后14 d球腹蛛显著增加,微蛛、狼蛛的数量及蜘蛛总量无显著差别。室内测定,氯虫苯甲酰胺处理后,黑肩绿盲蝽及稻虱缨小蜂的死亡率在0~6.67%。上述结果表明：氯虫苯甲酰胺对稻纵卷叶螟有很好的防效,且对稻田有益节肢动物安全。 相似文献
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稻纵卷叶螟是危害水稻生长与产量的三大病虫害之一,本试验以35%氯虫苯甲酰胺为研究药剂,以期测定不同浓度的35%氯虫苯甲酰胺(WG)对稻纵卷叶螟的防治效果。田间药效实验表明:35%氯虫苯甲酰胺(WG)10.5 g/hm2、21.0 g/hm2、31.5 g/hm2 3个浓度对稻纵卷叶螟幼虫均具有防治效果。31.5 g/hm2、21.0 g/hm2防治效果比较理想,药后3 d防效分别为70.25%、74.38%,药后8 d防效分别为90.36%、91.98%。药后13 d防效为95.71%、97.83%,药后18 d防效为83.75%、89.95%。药后30 d的药效依然高于标准药剂,达到46.25%、49.75%。通过试验可以得出35%氯虫苯甲酰胺WG药效持续时间较长,并能减少因虫害造成的水稻产量损失。 相似文献
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水稻条纹病毒胁迫下的水稻蛋白质组学 总被引：2，自引：0，他引：2
采用双向电泳联用MOLDI-TOF-TOF质谱对水稻感病品种武育粳3号和抗病品种KT95-418感染水稻条纹病毒（Rice stripe virus,RSV）前后的叶片进行蛋白质组学分析。结果显示,RSV基因组编码的病害特异蛋白（disease specific protein,SP）在武育粳3号中的积累量明显高于KT95-418中。其他25个蛋白经质谱成功鉴定,包括RSV NS2蛋白,寄主中与光合作用、细胞氧化还原状态和离子平衡状态及蛋白的合成、转运与翻译后修饰等相关的蛋白。对这些差异表达的蛋白与水稻感、抗病的作用进行了分析。 相似文献
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V. A. Awoderu 《国际虫害防治杂志》2013,59(4):416-424
Abstract The two major fungal diseases of rice in Nigeria are rice blast (Pyricularia oryzae Cav.) and brown spot (Cochliobolus miyabeanus (Ito and Kuribayashi) Dreschler ex Dastur). The loss in grain yield attributable to these diseases ranges from 11.5–39.6% and 12–43% respectively, Mancozeb, blasticidin-S, fentin hydroxide, benomyl and edifenphos as foliar sprays effectively control rice blast in the laboratory and field. Brown spot is controlled by spraying with thiram, mancozeb or blasticidin-S. A more useful approach to the control of these diseases being adopted in Nigeria is the search for horizontally resistant varieties. Other fungal diseases of rice in Nigeria are the green smut (Ustilaginoidea virens (Cooke) Tak.), basal sheath rot (Rhizoctonia solani Kühn), sheath blight (Corticium sasakii (Shirai), Matsumoto.), leaf scald (Rhynchosporium oryzae Hashioka and Yokogi), narrow brown leaf spot (Cercospora oryzae Miyake) and bakanae disease, a foot rot caused by Fusarium moniliforme Sheldon. Two suspected cases of virus diseases have been reported; grassy stunt disease (transmitted by Nilaparvata lugens Stal.), and orange leaf disease (transmitted by Inazuma dorsalis (Motschulsky). No bacterial disease of rice has been found in Nigeria. 相似文献
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Gnissa Konate Soungalo Sarra Oumar Traore 《European journal of plant pathology / European Foundation for Plant Pathology》2001,107(3):361-364
Seed transmission of two pathogroups of rice yellow mottle virus from Soudano-Sahelian areas of West Africa was studied in several rice genotypes. The virus was detected by enzyme-linked immunosorbent assay and the highly susceptible rice variety BG 90-2 was used for infectivity assays. In most of the rice genotypes studied (17 out of 21), rice yellow mottle virus was detected in all seed parts including glumella, endosperm and embryo at a rate ranging from 65 to 100%. Nevertheless, no seed-borne infection was found. Infectivity of the virus decreased throughout the process of seed formation suggesting inactivation of the virus as a result of seed maturation and desiccation. It was concluded that rice yellow mottle epidemics do not develop from seed-borne infections in rice seeds. 相似文献
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O. Traoré M. D. Traoré D. Fargette G. Konaté 《European journal of plant pathology / European Foundation for Plant Pathology》2006,115(2):181-186
The effect of contamination of rice seedlings by Rice yellow mottle virus (RYMV) in seedbeds on the onset and spread of rice yellow mottle in the field was investigated. Rice seedlings were artificially contaminated in seedbeds at different rates (0.1, 0.5, and 2.5%) and pooled in bundles before transplantation, as done by farmers. RYMV was successfully transmitted through contaminated hands and bundling healthy and diseased seedlings together. Hand contamination was responsible for 4.5% infection. Disease incidence in the field after secondary spread reached 32% for 2.5% seedbed contamination rate but remained limited (less than 10%) for all other rates. Eradicating infected plants from seedbeds lessened disease incidence in the field. This technique may be used in conjunction with other prophylactic measures to efficiently control rice yellow mottle disease. 相似文献