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稻乐思又名都尔,是瑞士汽巴—嘉基公司生产的酰胺类高效除草剂。该产品在我国以前主要用于大豆、花生、玉米、蔬菜等作物防除禾本科杂草、莎草和部分阔叶杂草。近年通过有关科研单位和植保技术推广部门的大量试验示范,证明稻乐思单用或与农得时、草克星等除草剂混用,能有效地防除稻田杂草,而且用药量少,成本低,按推荐的剂量和方法使用,对水稻安全。1 稻乐思单用防除稻田杂草的效果 相似文献
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调查研究了云南省大理州苦良姜田杂草种类、分布和发生危害规律 ,结果表明 :杂草共有 16 2种 ,隶属 32科 ,发生危害重的有 2 0科 38种 ,占 2 3 4 5 % ;在一年内杂草发生有冬春季、夏季和夏秋季三个高峰 ,危害种类有阔叶类、莎草科、禾本科和蕨类 4种 ;发生量以夏季和夏秋季最大 ,达90 0~ 2 75 0株 m2 ;防治上宜坚持以农业防治为基础、化学防治为主导的综合治理策略 ,对不同时期的杂草 ,可选择 2 0 %克芜踪、5 0 %敌草隆、5 %精喹禾灵、2 4 %果尔等药剂单用或混用防除 ,效果达90 %以上。 相似文献
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华盛顿州东部核果类果树的化学除草有季节防除与暂时防除两种方法。季节防除是在秋季施药,以期防除来年发生的杂草,施药时期一般在11月1日后至土地始冻前。有喷灌和灌溉条件的果园也可在春季施药。季节防除的对象是禾本科杂草和阔叶杂草。常用除草剂的单用、混用用药量见表1。 相似文献
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引进9.5%丙嗪嘧磺隆悬浮剂防除移栽水稻田杂草,设计3个药剂处理:一是先做封闭处理,再使用9.5%丙嗪嘧磺隆悬浮剂;二是每667 m~2用9.5%丙嗪嘧磺隆悬浮剂55 mL+53%苯噻·苄可湿性粉剂80 g混用;三是每667 m~2用9.5%丙嗪嘧磺隆悬浮剂55 mL(单用)。再用常规药剂做对照。试验结果表明,9.5%丙嗪嘧磺隆悬浮剂能有效防除水稻田阔叶杂草和禾本科杂草,可作为水稻田二次施药的常规药剂,且可与其他农药混用。 相似文献
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除草剂混用防除玉米地杂草李复宁(湖北省襄北农场植保站,441000)我场是玉米小麦连作地区。近年来,应用阿特拉津防除玉米地杂草已成为主要的栽培措施之一。但由于阿特拉津对部分单、双子叶杂草防效差,单用后除草效果不很理想,而且对后茬小麦常造成零星药害。为... 相似文献
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《杂草科学》2019,(4)
探究安融乐作为除草剂助剂与小麦田激素型除草剂20%氯氟吡氧乙酸乳油和56%2甲4氯钠可湿性粉剂混用后能否提高对目标杂草的防除效果。调查上述2种除草剂6个剂量单用及其与0.02%(V/V)安融乐混用后对小麦田杂草大巢菜、猪殃殃和荠菜的防除效果,统计药害综合指数并得到回归方程及ED_(50)、ED_(90)值。氯氟吡氧乙酸乳油与安融乐混用后,猪殃殃、大巢菜和荠菜的死亡时间分别提前3.5、2、1 d,ED_(90)值(商品量)平均降低206 mL/hm~2,增效10.31%;2甲4氯钠可湿粉剂与安融乐混用后,猪殃殃、大巢菜和荠菜死亡的时间分别提前4.5、3、1 d,ED_(90)值(商品量)平均降低851 g/hm~2,增效22.60%。安融乐能有效提高小麦田激素类除草剂对目标杂草的作用速度及防除效果,因此可作为以上2种除草剂的增效助剂进一步示范和推广。 相似文献
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金秋防除麦田杂草试验初报 总被引:1,自引:0,他引:1
金秋是美国氰胺公司开发的防除稻田杂草的除草剂。为探索其防除麦田阔叶类杂草的有效性、安全性和推广应用前景,1997~1998年,在氰胺公司配合下进行了金秋单用及其与丁草胺、绿麦隆、异丙隆、乙草胺的混用试验。现将结果报道如下:1材料与方法1.1供试药种1... 相似文献
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福寿螺配偶个体大小选择性初步观察 总被引:7,自引:0,他引:7
通过野外观察与实验研究,掌握了福寿螺的婚配体制及其配偶选择性规律。福寿螺与多数低等动物一样,其婚配属于乱交制,无固定配偶;雌螺对与其交配的雄螺个体大小没有选择性,而雄螺对雌螺的个体大小有选择性,倾向于与较大个的雌螺交配。 相似文献
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Christopher D. Keating Lindy M. Holden-Dye Robert J. Walker 《Pest management science》1996,46(3):263-266
The neuropeptide AF2 has a complex set of actions on the dorsal muscle strip of Ascaris suum, including a potentiation of the acetylcholine-stimulated muscle contraction. Caffeine at 100 μm and 5 mm inhibited this potentiation, as did 100 μm theophylline in two out of six studies. The cyclic-AMP-potentiating compounds IBMX, dibutyryl cAMP and forskolin had no effect on the AF2-induced potentiation of the acetylcholine-stimulated muscle contraction. These preliminary data suggest that the potentiating action of AF2 is not mediated by a cAMP pathway. 相似文献
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E. LIMPERT B. C. CLIFFORD A. DREISEITL R. JOHNSON K. MÜLLER A. ROELFS C. WELLINGS 《EPPO Bulletin》1994,24(1):109-112
A variety of systems of designation has evolved to name pathotypes of plant pathogens. The systems were evaluated to determine those best suited for particular purposes. Virulence and avirulence/virulence formulae of pathotypes have advantage over the use of consecutive numbers or letters given in chronological order of pathotype discovery. As soon as pathotype information exceeds a certain level of complexity, mathematical codes are most advantageous, in particular two codes, octal notation and coded triplets. A more universal adoption of the most appropriate codes is recommended to ease communication and comparisons of results. 相似文献
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F.M. Ashton O.T. de Villiers R.K. Glenn W.B. Duke 《Pesticide biochemistry and physiology》1977,7(2):122-141
Time- and concentration-course studies were conducted to determine the effect of thirteen herbicides on photosynthesis, respiration, RNA synthesis, protein synthesis, and lipid synthesis using isolated single leaf cells. Each herbicide was from a different chemical class. Appropriate 14C-substrates and product purification procedures were used for each process prior to liquid scintillation counting. The most sensitive metabolic site of inhibition was photosynthesis for atrazine, bromacil, dichlobenil, monuron, and paraquat; RNA synthesis for dalapon and dinoseb; protein synthesis for chlorpropham; and lipid synthesis for CDAA, chloramben, 2,4-D, EPTC, and trifluralin. However, with several herbicides, one or more process was almost as sensitive as the one mentioned above. All herbicides inhibited more than one process, and the most sensitive site of inhibition may not be the same process that was inhibited the greatest at the maximum concentration and maximum exposure time used. Therefore, a concept of metabolic sites of action, rather than a primary site of action, appears to be more meaningful for herbicides. 相似文献
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Effects of timing and method of application of Penicillium oxalicum on efficacy and duration of control of Fusarium wilt of tomato 总被引:3,自引:0,他引:3
The effects of timing and method of application of Penicillium oxalicum on the control of fusarium wilt of tomato were investigated. Application of P. oxalicum to tomato seedlings in seedbeds reduced disease caused by Fusarium oxysporum f.sp. lycopersici in a growth chamber by 45–49% and in glasshouse experiments by 22–69%. Disease suppression was maintained for 60–100 days after inoculation with the pathogen in the glasshouse. No disease reduction was observed in tomato plants where P. oxalicum was applied to seeds. Treatment with P. oxalicum did not affect the population of F. oxysporum f.sp. lycopersici in the rhizosphere. 相似文献
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为了研究青稞种子外部和内部携带真菌情况,比较不同杀菌剂对青稞种子的带菌消毒效果和对幼苗生长的影响,为青稞种子播前包衣处理和种传真菌病害防控提供依据,采用离体平皿法对云南迪庆‘云青1号’、‘云青2号’和‘短白青稞’3个主栽品种进行带菌检测,并对种子进行拌种或浸种处理测定6种杀菌剂对种子消毒效果,分析杀菌剂对种子发芽和幼苗生长的影响。结果表明:供试青稞种子表面携带的优势菌群为青霉(Penicilliumspp.)、镰刀菌(Fusariumspp.);种子内部寄藏的真菌主要为镰刀菌、核腔菌(Pyrenophoraspp.)、附球菌(Epicoccumspp.)、丝核菌(Rhizoctoniaspp.)、链格孢(Alternariaspp.)和木霉(Trichoderma spp.)。青稞不同品种的种子表面及内部携带的真菌种类差异较大。致病性测定表明,镰刀菌对种子萌发和幼苗生长影响最大,后期出现幼苗坏死现象。45%咪鲜胺EW、75%百菌清WP、50%福美双WP对青稞种子携带真菌均有显著抑制作用和消毒效果,50%福美双WP消毒效果最优,达100%;45%咪鲜胺EW、75%百菌清WP、50%福美双WP处理对青稞种子发芽和幼苗生长均无显著影响。 相似文献
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棉花黄萎病菌致病型的AFLP分析 总被引:16,自引:0,他引:16
选用41个棉花黄萎病菌(Verticillium dahliae)代表菌系,在温室条件下,对4个棉花品种鄂荆1号(感)、中棉所12(耐)、文-5(抗)和唐棉2号(抗)进行致病性测定,结果可将供试菌系分为落叶型与非落叶型2类。选取8对AFLP引物PCR扩增的结果中,统计带型稳定、清晰且有多态性的条带,共169条作系统聚类分析,将上述菌系分为2大类,第一类为非落叶型菌系,包括10个非落叶型菌系和1个过渡菌系;第二类为30个落叶型菌系。根据聚类分析建立树状图,发现菌系与地理来源存在一定的相关性,而依据菌系致病力强弱分类则相关关系不大。选用25对EcoRⅠ和MseⅠ引物组合,对供试的41个V.dahliae进行AFLP扩增,筛选到2对引物E64(GACTGCGTACCAATTCGAC)、M53(GATGAGTCCTGAGTAACCG)和E49(GACTGCGTACCAATTCCAG)、M65(GAT-GAGTCCTGAGTAAGAG),能分别扩增出433bp和110bp2条仅为V.dahliae非落叶型菌系独有的特异片段,可将落叶型与非落叶型菌系分开,这2条特异片段被命名为EM433和EM110。 相似文献