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23种杀虫剂对稻纵卷叶螟的田间防治效果 总被引:8,自引:2,他引:6
为进一步明确现有杀虫剂对水稻稻纵卷叶螟的效果。在大田中,以喷雾施药法对23种杀虫剂进行了防治稻纵卷叶螟的田间试验。结果表明:用药20d后,对稻纵卷叶螟控制效果达90%以上的品种有:氯虫苯甲酰胺、甲氨基阿维菌素苯甲酸盐、阿维菌素和氟虫睛;防治效果达80%~90%有敌敌畏、辛硫磷、毒死蜱、丙溴磷、杀螟硫磷、乙酰甲胺磷、三唑磷、喹硫磷、敌百虫,以及杀虫单、氟铃脲、仲丁威。可以认为,只要施药及时,目前大多数杀虫剂仍能有效控制稻纵卷叶螟的为害。 相似文献
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37种杀虫剂混剂对稻纵卷叶螟的田间防治效果 总被引:5,自引:1,他引:4
为进一步明确现有杀虫剂对水稻稻纵卷叶螟的效果。2007年,在大田中,以喷雾施药法对37种杀虫剂混配剂进行了防治稻纵卷叶螟的田间试验。结果表明:用药20天后,对稻纵卷叶螟控制效果达90%以上的品种有11种;控制效果达80%~89%有23种;控制效果〈80%的仅3种。可以认为,合理的混配剂,可能是今后控制稻纵卷叶螟为害的最为经济有效品种。 相似文献
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稻纵卷叶螟是都匀市水稻生产上的主要害虫之一,近年来,发生日趋严重,暴发成灾年份频繁,对水稻生产构成严重威胁。过去,农户习惯使用50%甲胺磷乳油或50%甲基对硫磷乳油等高毒高残留农药防治稻纵卷叶螟,虽防治效果较好,但属高毒高残农药,该类农药于2007年1月起被国家明令禁止使用。为寻找替代防治稻纵卷叶螟的理想药剂,2007—2008年引进了40%丙溴磷乳油进行防治稻纵卷叶螟田间防效试验和示范,试验结果表明,40%丙溴磷乳油在稻纵卷叶螟1~2龄幼虫高峰期防治效果显著,对高龄幼虫也有较好的防治效果。 相似文献
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不同杀虫剂对稻纵卷叶螟的毒效研究 总被引:1,自引:0,他引:1
为了解不同杀虫剂对稻纵卷叶螟的毒力,筛选高毒农药的替代药剂,采用Potter喷雾法,对不同杀虫剂对广西南宁稻纵卷叶螟的毒力进行测定研究。结果表明,该地区稻纵卷叶螟对甲氨基阿维菌素苯甲酸盐的敏感性最高,其LC50值为3.4595 mg (a.i.)/L;对氟硅菊酯、三氟氯氰菊酯、辛硫磷、杀虫单、顺式氯氰菊酯、阿维菌素、丙溴磷、三唑磷等杀虫剂敏感性也较高,其LC50值在6.3490~44.8607 mg (a.i.)/L之间。田间试验结果表明,5%氟硅菊酯水乳剂300、450、600 g (a.i.)/hm2对稻纵卷叶螟防效最好,其防效均在80%以上,最高达87.35%;1%甲氨基阿维菌素苯甲酸盐乳油3.6、4.8、7.2 g (a.i.)/hm2和50%杀虫单可湿性粉剂1125、1500、1875 g(a.i.)/hm2,对稻纵卷叶螟也有较好的防效,其防效在66.05%~86.70%之间。 相似文献
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为筛选防治稻纵卷叶螟的生物农药,采用随机区组试验方法,对3种生物农药防治稻纵卷叶螟的效果进行了研究。结果表明:在稻纵卷叶螟1~3龄期,使用100亿孢子/ml短稳杆菌1200~1800ml/hm~2,16000IU/毫克苏云金杆菌1500~2250/hm~2和20亿PIB/毫升棉铃虫核型多角体病毒390~525g/hm~2,兑水750kg/km~2施用,药后7d后防治效果较好,3种药剂防治效果在76.0%~84.1%;药后14d,3种药剂防治效果存在差异显著性,以上3种生物农药可代替高毒化学农药来防治稻纵卷叶螟,建议生产上加大推广。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Applicability of molecular markers in the context of protection of new varieties of cucumber 总被引:2,自引:0,他引:2
G. P. Bernet S. Bramardi D. Calvache E. A. Carbonell M. J. Asins 《Plant Breeding》2003,122(2):146-152
The growing number of candidate varieties presented every year at each national Plant Variety Protection Office and their decreasing genetic variability forces strategies to be adopted that will reduce costs without losing rigour when deciding about the acceptance or rejection of a candidate variety. Molecular markers have been envisaged as a reliable tool to establish differences, but can molecular markers be used for assessing distinctness? A comparison between a molecular and a morphological characterization of 41 seed samples belonging to 36 cucumber varieties and including several external controls has been carried out to investigate the applicability of molecular markers in the context of distinctness, uniformity and stability (DUS) tests and the protection of new varieties. Both types of character indicate the same relationships among main groups, Dutch and Beth‐Alpha types, and Gerking and Slice types, the correlation between distance matrices being only 0.6489. Varieties considered uniform for morphological traits proved not to be so for molecular markers. Therefore, molecular characterization is not offering the same estimates of uniformity and relatedness between varieties as does morphological characterization. External controls were used to establish distinction limits with morphological and molecular dendrograms to focus on those varieties, which were suspiciously similar. The results with cucumber show that molecular identity could be used to assess any lack of distinctness and so corroborate the morphological assessment of candidate varieties. The morphological trait ‘type’ provides distinct characterization of varieties and the molecular characterization of candidate varieties could be used to design better field experiments to assess distinction within each group of morphological cucumber type. 相似文献