How to choose the right herbicide

Weeds in farmland have tenacious adaptability due to long-term natural selection. Weeds will consume soil fertility and water, affect the growth of sweet potato, provide abundant food, spawning ground and breeding conditions for pests, and cause huge losses to sweet potato production. There are many kinds of weeds in potato field, which can be simply divided into broad-leaved grass and narrow-leaved grass.

Effective use of herbicides in sweet potato fields can save a lot of labor and reduce the damage of weeding to potato ridges. At present, herbicides such as acetochlor are widely used. The specific application method is as follows: spraying the liquid medicine as soon as possible after planting, spraying 50 kg of 50% acetochlor emulsifiable concentrate and 0/00 ~/0/50 ml of water per mu. Pay attention to adding more water in dry days and try not to spray it on potato seedlings. After being polluted by a small amount of herbicides, potato seedlings will grow slowly at the top, but there are many branches, which have little effect on the final yield. If it is sprayed before planting, the planting effect will be better 4 ~ 5 days after spraying. Note that acetochlor is a selective pre-bud herbicide, which can be absorbed by plant buds and must be applied before weeds are unearthed.