Herbicide use of technology to improve

Play herbicide weed herbicide has its own performance characteristics , we must increase the use of technology to maximize the effectiveness of the herbicide weeding , weeding in order to achieve good results, and to reduce or avoid injury from occurring. To correctly handle the following relationships .

1 , application and climate relationships . When the weather is dry or when the wind is spraying, will increase the amount of liquid evaporation and drift , weeds, leaves , soil surface adhesion of the liquid is reduced , resulting in decreased herbicidal effects should be avoided in the dry and windy weather conditions The following spraying.

2 , application and temperature. Many herbicides increased activity in high temperature conditions , at low temperatures decreased activity , slow down dead grass , generally greater than the daily average temperature 8-10 ℃ degrees conducive efficacy of play . However, some herbicides in the day when the average temperature is about 5 ℃ low pressure sprayer spraying , you can still get a good herbicidal effect .

Such as fenoxaprop , alkynyl oxalic acid, tribenuron , azole grass ketone. In the days before winter the average temperature is about 5 ℃ ( no freezing at night as well ) to use , even after the winter to get a good herbicidal effect .

It should be noted with isoproturon head warm in cold tail spraying , cold spraying should be stopped 2-3 days before , or can produce cold injury.

3 , the relationship between pesticide and humidity . Whether soil or foliar treatment enclosed needs to have suitable soil moisture , drought conditions are not conducive to the efficacy of the play , you should avoid spraying too dry conditions .

4 , pesticide and water relations . How much water when spraying is related to the amount of liquid adhesion and uniformity of spraying , thus affecting the herbicidal effect . Asked not to re-spray herbicide , does not leak spray , repeat some easy to produce injury , where leakage spray weeds die. According to practical experience , as a soil closed when weeding , mu liquid volume of 45-60 kg as well ( hand sprayer 3-4 buckets of water ) , foliar treatment agent to 30-45 kg ( 2-3 buckets of water ) as well .

5 , application and preparation Quality. Crushing smooth soil surface is conducive to the formation of liquid membrane closure , weeding effect. Uneven soil surface , and large clods of soil surface is not conducive to closed , and because of freezing and thawing in winter , a large clods broken, resulting in increased spring the grass , reducing the herbicidal effect .