How to remove the weeds in the watermelon field

There are many kinds of weeds in watermelon fields, and the main hazards are 阔, 苋, 凹 苋, 苋, 马, wild watermelon seedlings, iron leeks, Xanthium and other broad-leaved weeds and crabgrass, foxtail, cattle Weed grass, teff grass and other grass weeds. There are two peak periods in the occurrence of weeds in watermelon fields. The first peak period is before and after the watermelon seedlings are unearthed. The weeds in this period account for about 60% of the total number of weeds in the whole growth period of watermelon. The second peak period is about 70 cm in length when the watermelon vines are about 70 cm long. 30%. The weeds in the watermelon field are mostly large in roots, adaptable, fast-growing, widely spread, and long-lived. If not prevented in time, it is easy to compete with watermelon for sun, fertilizer and pests.

Weeds in watermelon fields should be comprehensively controlled. It is necessary to pay attention to the comprehensive prevention and control of diseases, insects and grasses, as well as comprehensive measures such as agricultural control, weed quarantine, machinery, chemistry and physics. Different areas, different plots, and different years should have different prevention and control contents and prevention methods.

(1) Precautionary measures Strict quarantine system to limit the invasion of dangerous weeds in foreign countries and in infected areas. Remove weeds from the fields and fields to prevent weed seeds from spreading and continue to breed. The farmer's fertilizer is fully decomposed and the weed seeds mixed in are killed. Clean the irrigation water and reduce the grass into the farmland.

(2) Reasonable rotation of weeding measures to prevent weeds from germination or to promote their germination and eliminate weeds. Soil cultivation measures such as ploughing, hoeing and cultivating are the basic methods for eliminating weeds for a long time, and are the main methods in current agricultural production. Some weeds can also be removed by biological methods such as animals, insects, and germs. It is also possible to use mulching techniques to control weeds in the field.

(3) Chemical weeding Chemical weeding is the use of herbicides to control harmful weeds. In order to protect crops, the relationship between herbicides, weeds, crops and the environment must be coordinated. Watermelon is very sensitive to the herbicide reaction. Therefore, according to the nature, characteristics, weed traits, types and different environmental conditions of the herbicide, the pharmacy and design method should be used reasonably. After experimenting, demonstrating and gaining experience, it should be gradually promoted.

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