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- aquatic weed control 防除水生杂草
- Weed control and timing of treatment to avoid weed penalty. 杂草控制及适时处理，以防止其蔓延危害作物。
- Starry Night twisted together as a fairy tale, tree or building, like aquatic weed, smoke or talon. 星空象童话一样扭在一起，树，还是建筑，象水草、炊烟或魔爪。
- Ross D L,David C S,Giles D K.Precision weed control system for cotton. 陈勇.;自动施药机器人及可变量控制系统研究:[博士学位论文]
- Burning of crop residues; minimum tillage and hand pulling for weed control(farmers' practice). 焚烧作物残体，少耕和人工除草（农民习惯措施）。
- Field experiments in wheat were conducted to determine broadleaf weed control efficacy of tribenuron plus synergist. 摘要在田间条件下，用苯磺隆加增效剂对麦田阔叶杂草的除草效果进行了试验。
- A landscape fabric may be used under the organic mulches to improve weed control. 阿景观织物可用于有机覆盖物下，以提高控制杂草。In general; black plastic is not recommended in soils that are poorly drained.;一般来说，黑色塑料，不建议将是排水不良的土壤。
- The effect is obvious on weed control with black film mulched,the fresh weight of weed in field is reduced 70. 利用黑色地膜覆盖防草效果明显,田间杂草鲜重比与黑膜同材质的透明地膜覆盖减少70。
- The results showed that the total weed control effect of 10% ZJ0273 EC at the application rate of 75 mL/ha were over 85%. 结果表明,10%25丙酯草醚EC75mL/hm2对油菜阔叶杂草、禾本科杂草及总体防除效果都在85%25以上,具有杀草谱广、持效期长、防除效果好和成本较低等特点。
- Integrating this technology with chemical weed control,the practice suited to mechanization,and saved energy with improved yield. 该技术与化学调控和化学除草技术相配套,适于机械化作业,达到节能高产的目的。
- In the future more detailed knowledge of safener action is required to improve the effective use of safener in weed control. 由于目前广泛地使用保护剂，因此在考虑如何有效利用保护剂以提高除草剂之选择性方面，对于保护剂作用机制之了解相当重要。
- When grass carp are introduced for weed control, they are often sterile in order to prevent them from overbreeding and then starving to death. 引进草鲤控制水草生长时，通常先得结扎，以防止过度繁殖而导致饥饿致死。
- Can reach waterways and contribute to the overgrowth of algae and aquatic weeds, which can kill off fish populations and other aquatic life. 能到达水路和令海藻和水生杂草太繁茂而杀害鱼群和其它水生生活。
- In these situations, adjust mowing, fertilizing, aeration, and weed control practices appropriately to the watering schedule. 在这种情况下，调整修剪，施肥，通风，以及杂草控制的做法恰当的浇水时间。
- In addition, the selection of the apposite herbicide and effective weed control were quarantee of success in rice dry planting. 选用适当的除草剂并进行有效除草是水稻旱种成攻的保证。
- The main reasons of the fast development of GMS in USA and Argentina were that GMS made the weed control in soybean production convenient and with high efficiency. 2)美国和阿根廷转基因大豆快速发展的主要原因是种植转基因大豆可使杂草管理便利化和高效率。
- Field experiments were conducted to evaluate preapplied roundup tank mixtures with atrazine plus acetochlar for weed control in zero-tillage corn field. 对农达和乙阿合剂单用及桶混在免耕玉米田的除草效果进行了研究。
- Weed control efficacy in alfalfa was investigated using a foliar treatment of an imazethapyr 5% AS plus fenoxaprop-P 6.9% EW plus fluazifop-P 15% EC mixture. 通过5%25咪唑乙烟酸AS与6.;9%25精恶唑禾草灵EW、15%25精吡氟禾草灵EC混用，研究其在紫花苜蓿茎叶除草中的作用效果。
- Monoculture allows for large machines to aid in the mechanization of planting, weed control, and harvesting, and less knowledge about the actual plants is needed for it to work. 单一允许大型机器协助机械化种植，杂草控制，和收获，而较少了解工厂的实际需要为它工作。
