Application Method

Choose the best application time . For closed herbicides , be sure to use before weeds sprout , once weeds grow , increase resistance , weeding poor results. For foliar herbicides should grasp % 26ldquo; except early, in addition to a small % 26rdquo; principle. Weed plant age the greater the resistance will be. In a normal year , about 90% emergence of weeds , weed seedlings organize young , drug resistance is weak , easily killed. In the daily average temperature is above 10 ℃ , use of herbicides recommended dosage limit , will be able to obtain more than 95% of the control effect . Early seedling stage is appropriate poison indigenous ; sensitive to herbicides fast growing period , with particular caution ; seedling hardening of seedlings although some resistance , but most of the weeds have matured , application plays a minor role .

Flexibility dosage. Seedling resistance to herbicides is a certain limit , it can not arbitrarily increase the dosage . In addition, different resistance of different seedlings should be strictly in accordance with product instructions . In general, the dosage of coniferous species can be bigger, broadleaf species dosage should be smaller. The same seedling varieties resistant to certain agents will increase with increasing seedling age , the dosage can be increased accordingly , such as controlling pine, fir nursery weeds can acre with 23.5% of the fruit Seoul EC 50 ml single-use , or 23.5% of the fruit Seoul EC 30 ml plus 50% acetochlor EC l00 ml mix. If used for hardwood species nursery , the dosage should be reduced appropriately. For annual weeds , use the recommended dosage can be. For perennial weed ,hand pump sprayers perennial weeds , you need to appropriately increase the dosage.

Note that when spraying temperature and soil moisture . Temperature directly affects the efficacy of the herbicide . For example MCPA , 2,4% 26mdash; D below 10 ℃ pesticide efficacy poor , 10 ℃ or more pesticide efficacy do. Herbicides fast off spirits , although the ultimate effect of superstar not affected by temperature , but at low temperatures 10% 26mdash; 20 days after the exhibit herbicidal effects . All herbicides should be sprayed on a sunny day when the temperature is high , in order to give full play to efficacy. Whether growing seedlings before soil treatment or foliar spraying , soil moisture are important factors affecting the level of efficacy . Seedlings before spraying, if the surface soil humidity, easy to form a tight seal to kill drug layer of soil and weed seeds germinate unearthed fast, so anti -efficient . Growing application , if the soil is moist ,perfume sprayer vigorous weed growth , which will help the absorption of weeds and weed control agents operate in the body , so the efficacy of play quickly, weeding effect.