Pesticide use technology to improve

Increased use of technology, performance play herbicide weed herbicide has its own 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 ℃ 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 garden hand sprayers weeds die. According to practical experience, as a soil closed when weeding, mu liquid volume of 45-60 kg as well (hand portable sprayers 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.