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为明确8%精喹·乳氟禾乳油防除花生田杂草的效果和对花生的安全性,采用田间小区试验的方法,观察其对花生田杂草的防效和对花生产量的影响。结果表明,8%精喹.乳氟禾乳油有效成分用量100.0~240.0 g/hm2对花生田马唐、牛筋草、反枝苋、马齿苋等杂草均有好的防治效果,药后20 d,总体株防效为96.45%~99.68%,鲜重防效97.93%~99.83%。对作物花生安全性较好,药后部分叶片出现药害斑,不扩展,可恢复,对花生苗期生长无影响,增产率33.42%~47.33%。 相似文献
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40%乙·果乳油对花生田杂草具有很好的防治效果。在花生播种后用药60ml/667m^2进行进行土壤表面喷雾处理,施药后45天对花生田一年生单、双子叶杂草的防效在95%以上,一次用药,可控制花生整个苗期的杂草。 相似文献
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40%乙草胺·扑草净悬浮乳剂防除棉花田杂草田间试验 总被引:1,自引:1,他引:0
研究了40%乙草胺·扑草净悬浮乳剂对棉花田杂草防除效果,同时研究了该剂对棉花品质的影响。试验结果表明,40%乙草胺·扑草净悬浮乳剂对棉花田杂草具有良好的控制效果,200~250mL/667m2用药后50d对杂草株防效和鲜重防效都在94%以上。试验还表明,40%乙草胺·扑草净悬浮乳剂对棉花品质没有不良影响。 相似文献
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田间试验结果表明: 30%丁· 乳油对水稻移栽田杂草防效显著。在水稻移栽后7天用丁· 70、90、110g/667m2施药后 20天总株防效分别为 68.02%、89.97%、92. 18%;施药后 60天总株 防效分别为62、22%、86.99%、89.31%,总鲜重防效分别为76.93%、86.65%、93.13%。极显著优 于单剂A,虽与单剂B防效相当,但农本明显低于单剂B,丁· 对水稻安全。 相似文献
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6种除草剂防除烟地杂草效果评价 总被引:5,自引:1,他引:4
为了探索既对烟株生长无明显影响又能有效防除烟地杂草的新型除草剂,2004年我们对25%砜嘧磺隆DF等6种除草剂进行了药剂筛选试验,结果表明,芽前除草剂40%异松·仲灵EC和芽后除草剂25%砜嘧磺隆DF对烟地杂草的防除效果最好,6种除草剂对杂草防效的排序为:25%砜嘧磺隆DF>40%异松·仲灵EC>72%异丙甲草胺EC>50%敌草胺WP>6.9%精唑禾草灵EW>10.8%高效氟吡甲禾灵EC。 相似文献
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西瓜田化学除草技术探讨 总被引:1,自引:0,他引:1
72%异珍甲草胺乳油70毫升,48%氟乐灵服油30毫升混土,无论在单膜覆盖,双膜覆盖工露地条件下,均有很好的防除效果。株防产分别为95.9,93.2%,鲜重防效为97.5%,95.2%,对西瓜安全。西瓜对除草剂反应敏感,必须慎用。 相似文献
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农药助剂885对氧乐果的杀蚜效果有显著的增效作用。田间试验表明,氧乐果与农药助剂885混配得到的20%增效氧乐果乳油对棉蚜的防效与40%氧乐果乳油相当,而农药用量可减少50%,并且对棉化植株安全。 相似文献
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在落叶松苗圃中使用33%二甲戊乐灵乳油、41%草甘膦水剂、24%乙氧氟草醚乳油、50%扑草净可湿性粉剂及24%乙氧氟草醚乳油+12.8%吡氟氯禾灵乳油进行化学除草试验.结果表明:2250 mL/hm2的33%二甲戊乐灵乳油在落叶松播后芽前使用,除草效果良好;在落叶松幼苗期,使用50%扑草净可湿性粉剂2250 g/hm2除草效果和持效期最好,41%草甘膦水剂4500 mL/hm2、24%乙氧氟草醚乳油+12.8%吡氟氯禾灵乳油(1200+750)mL/hm2效果稍次之. 相似文献
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W. A. Muirhead S. K. De Datta P. A. Roger R. M. Gusto 《Nutrient Cycling in Agroecosystems》1989,21(2):95-107
The effects of the algicides terbutryn and copper sulfate on the potential for reducing the gaseous loss of NH3 from urea applied to rice were examined in experiments with 2 methods of N fertilizer management, 2 or 3 N rates, and 3 algicide treatments. The experiments were conducted during the 1986 dry and wet seasons in an experimental field at Pila, Laguna, Philippines.Copper sulfate had little effect as an algicide at the rate used, but terbutryn immediately reduced algal growth. The populations of species resistant to terbutryn probably increased, but terbutryn had no long-term effect on the total number of colony-forming units of algae. There was some evidence that terbutryn reduced photodependent N2 fixation as estimated by acetylene reduction assay.Terbutryn, when applied with urea 10 days after transplanting, reduced the maximum floodwater pH by 0.9 units or more for 7 d in the DS and by about 0.5 units for 8 d in the WS. Terbutryn increased the ammoniacal-N (AN) concentration in the floodwater 100% or more in the DS and 60% in the WS. The combined effect of terbutryn on the floodwater pH and AN concentration was reduced photodependent NH3 partial pressure (NH3), about 25% in the DS and 38% in the WS.
deceased 相似文献
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为验证50%仲灵.乙草胺乳油对大豆田杂草的药效、杀草谱及对大豆生长的安全性,采用播后苗前土壤喷雾处理、定期调查的方法进行田间药效试验。结果表明,药剂50%仲灵.乙草胺乳油的杀草谱较广,对一年生禾本科杂草及大部分阔叶杂草有良好的防效。施药后20 d调查,对各种杂草株防效为77.0%~96.3%;施药后40 d调查,对各种杂草株防效为79.5%~97.0%。对大豆产量未见不良影响。50%仲灵.乙草胺乳油适宜有效成分用量为1500~2250 g/hm2,对水750L/hm2,播后苗前土壤喷雾。 相似文献
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Highly delaminated montmorillonite (from Wyoming) with a high specific surface area when dispersed in water was used as an adsorbent of the hydrophobic herbicide metolachlor. The montmorillonite was coagulated with Na+, Ca2+, Al3+ and benzyl trimethylammonium ions. Ca2+ and Al3+ screened the surface charges and the adsorption of metolachlor was strongly enhanced by the interaction of metolachlor with the hydrophobic siloxane oxygen atoms and the water molecules of the hydration shell of the interlayer cations. With increasing salt concentration the mechanism changed from a cooperative adsorption process on a heterogeneous surface (S-type isotherm) to adsorption on a homogeneous surface (L-type). Coagulation with Ca2+ and Al3+ increased the amounts of metolachlor adsorbed from 14–41% (Na+) to 57–86% (Ca2+) and 67–91% (Al3+). The light microscopic images revealed that increasing amounts of metolachlor changed the band-type network into spherical “potato-like” aggregates. The enhanced herbicide adsorption hydrophobized the particles that crowded together to form spherical aggregates. Entrapping the herbicide molecules in clay mineral aggregates—either band-type networks or spherical aggregates—offers a useful tool in creating leaching-resistant herbicide formulations. 相似文献
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42%阿维·丙溴磷乳油防治水稻二化螟药效试验 总被引:1,自引:0,他引:1
进行了42%阿维·丙溴磷乳油防治水稻二化螟田间药效试验。结果表明,42%阿维·丙溴磷乳油是防治水稻二化螟的较好药剂,其防效较高,在试验剂量范围内对水稻安全。建议42%阿维·丙溴磷乳油有效成分用量为315~441 g/hm2,在二化螟低龄幼虫高峰期施药。 相似文献