To control weed in tobacco field more effectively, field experiments were carried out with 3 types of herbicidal film after flue-cured tobacco transplanting.
为更有效地防除烟田杂草，在烤烟移栽大田后采用3种除草膜进行了烟田除草试验。
Of course, biological control agents can safely be released only if it can be verified that they feed solely on the target weed.
当然，只有能够证明它们仅以目标杂草为食，生物控制剂才能安全释放。
CIBC successfully used a seed-feeding weevil, native to Mexico, to control the obnoxious parthenium weed, known to exert devious influence on agriculture and human health in both India and Australia.
加拿大帝国商业银行成功地使用了一种原产于墨西哥的以种子为食的象鼻虫来控制讨厌的帕特农杂草，这种杂草已知会对印度和澳大利亚的农业和人类健康产生负面影响。
Chemical weed killers or natural treatments like corn gluten can suppress weed growth. Dense planting of a crop can also act as a natural control.
化学除草剂或类似玉米麸等自然手段可以抑制杂草的生长。作物密集种植也能作为一种自然控制手段。
Once weed control has been accomplished, further tillage of the soil is not recommended.
如果完成了杂草的控制，对土壤的再次翻耕就不需要了。
An added advantage of micro irrigation is weed control.
微灌的一个好处是控制杂草。
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。
The associated problems with this weed include its competitiveness, difficulty of control, and the reduction of quality through genetic contamination of pure lines of rapeseed and the like.
与自生油菜(杂草)相关的问题包括杂草的竞争性、难以控制以及通过对油菜纯系的基因混杂造成油菜品质的下降等等。
The infrared-transmitting (IRT) mulches provide the weed control properties of black mulch and are intermediate between black and clear mulches in terms of increasing soil temperature.
红外线透性薄膜有黑色薄膜那种控制杂草的特性，在增加土壤温度方面介于黑色与透明薄膜之间。
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。
Noxious weed and pest control?
有害杂草和害虫的控制？
Accurate weed identification is the first step in a successful weed control program.
对杂草的精确确认是杂草控制项目成功的第一步。
In recent years, effective weed control by allelopathy characteristics of plants in agricultural and animal husbandry ecosystem has been studied and applied widely.
近年来，利用植物的化感特性达到对农牧业生态系统中杂草的有效控制已被广泛研究和应用。
The trail showed that tralkoxydim 40% WG had a good control to grass weed in wheat.
结果表明，40%三甲苯草酮WG对小麦田禾本科杂草具有较好的防除效果。
The result indicated that, alfalfa seedlings grew well, the weed control efficiency of trifluralin reached above 90%.
结果表明，苜蓿幼株长势良好，氟乐灵对杂草杀灭率为90%以上。
This paper deals with the conception, significance, measures of integrated weed control in turf and its current problems.
概述了草坪杂草综合防除的概念、意义、措施以及目前草坪杂草防除上存在的问题。
This system included weed identification subsystem, herbicide information subsystem, weed control subsystem.
本系统包括杂草识别子系统、除草剂信息子系统、杂草防除子系统。
Field experiments in wheat were conducted to determine broadleaf weed control efficacy of tribenuron plus synergist.
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。
This paper discusses the efficacy of foramsulfuron used with Biopower at different concentration ratios for weed control in corn.
探讨了甲酰胺磺隆+拌宝不同浓度配比对玉米田杂草的防除效果。
This article discussed the division of conservation management, watering, fertilizing, pruning, pest control, cultivation, weed, anti-cold and other aspects.
本文从一年养护管理工作的划分、浇水、施肥、整形修剪、病虫害防治、中耕除草、防寒等多方面进行了论述。
The results showed that the overall weed control effects of rice straw coverage were above 85% and significantly increased the light intensity in rape fields.
结果表明，稻草覆盖总体控草效果可达85%以上，使油菜株间光照强度显著上升。
In the biological control of weeds, the measure which was first studied and applied, and which has also been proved effective is weed-control by insects.
在杂草的生物防除中，研究和应用得最早且证明效果最好的措施是利用昆虫防除杂草。
Problems with using agricultural pesticides in the production of a secure food supply has led to the world-wide problem of weed populations developing resistance to herbicides used for their control.
在安全食品方面使用农药的问题导致了世界范围内的如杂草种群抗药性以及除草剂的使用等广泛问题。
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 。
In modern field of chemical weed control, amide herbicides have been occupying an important position.
酰胺类除草剂在近代农田化学除草中一直占据重要地位。
Investigation on the weed species and control techniques were done in 2001-2003. Speices and community distribution of weed had been found in farmland in Huaibei area.
2003年，进行了农田杂草调查及防治技术研究，基本摸清了淮北地区农田杂草种类和群落分布。
Although we have achieved great progress in the general control of the weed, there are also some serious problems in the harms of the weed, succession, drug-fast and the pollution of the herbicide.
虽然我国农田杂草综合治理已经取得了长足进步，但杂草危害、演替、抗药性、除草剂药害等问题仍相当严重。
The computed results indicate that when the weed density is below the threshold, no weed control should be required.
计算结果表明，当杂草密度低于阈值时，不需要防除。
The computed results indicate that when the weed density is below the threshold, no weed control should be required.
计算结果表明，当杂草密度低于阈值时，不需要防除。
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