6%烟嘧磺隆SC防除玉米田杂草的效果

采用6%烟嘧磺隆SC等除草剂对上海地区玉米田杂草进行田间防除试验。结果表明,在玉米4叶期左右,6%烟嘧磺隆SC 900～1 200 g/hm2兑水45 kg进行茎叶喷雾,能有效防除玉米田马唐、牛筋草、刺苋、凹头苋、马齿苋等一年生杂草。

6%乙基多杀菌素SC对水稻纵卷叶螟防治效果初报

6%乙基多杀菌素SC是美国陶氏益农公司研发的新型生物农药,2010年笔者开展了该药对水稻纵卷叶螟的田间药效试验,结果表明,在稻纵卷叶螟卵孵盛期每667m2用6%乙基多杀菌素SC30mL,有良好的保叶和杀虫效果,与每667m2用20%氯虫苯甲酰胺SC(康宽)10mL的防效相当。

6%双氟磺草胺·唑嘧磺草胺SC防除春小麦田阔叶杂草药效试验

为明确新型除草剂6%双氟磺草胺·唑嘧磺草胺SC对春小麦田杂草防治效果、最佳用量和对春小麦的安全性,采用田间随机区组试验设计,在春小麦3~5叶期进行茎叶喷雾处理,通过两年药效试验,调查杂草防除效果及春小麦安全性。结果表明,推荐剂量6%双氟磺草胺·唑嘧磺草胺SC有效成分用量10.35~12.60 g·hm^(-2),药后40 d对密花香薷、黎、野油菜防效达80%以上,后期目测防效81.33%~89.32%,并对小麦具有较好的安全性,增产率为10%以上。

6%阿维·氯苯酰SC(亮泰)对稻纵卷叶螟的防效及保叶效果评价

为了解和掌握6%阿维·氯苯酰SC(亮泰)对稻纵卷叶螟的防治效果,为诸暨市粮食生产提供保障,特进行了该药剂对稻纵卷叶螟的防治效果及保叶效果试验。结果表明,6%阿维·氯苯酰SC(亮泰)对稻纵卷叶螟有良好的速效性和持效性,并能起到较好的保叶效果,可作为防治稻纵卷叶螟的药剂加以推广。

Efficacy and Phytotoxicity Trial of Different Dosages of 4% Nicosulfuron SC on Weeds in Corn Fields

[Objective]The paper was to study efficacy and phytotoxicity of different dosages of 4% nicosulfuron on weeds in corn fields.[Method]With summer corn variety Zhengdan 958commonly used in field production in Hengshui area of Hebei Province of China as the test material,different dosages（1 050,1 500 and 1 950mL/hm2）of corn postemergence herbicide 4% nicosulfuron SC were sprayed during five-leaf stage of corn,and the treatments with water spraying and manual weeding were set as controls.The effects of different dosages of 4% nicosulfuron SC on weed control efficacy and safety and yield of corn were analyzed in order to determine the optimal dosage.[Result]Spraying 4% nicosulfuron SC with dosage of 1 500mL/hm2 during five-leaf stage of corn not only had better control effect against various weeds,but also did not produce phytotoxicity on corn,and the yield of corn was higher.[Conclusion]The study provided scientific information for using 4% nicosulfuron to eradicate weeds in corn fields.