The weeds in the orchards in North China are mainly divided into three types: early spring, late spring and perennial. The early spring type is dominated by 1-year-old monocotyledonous weeds. It begins to sprout in late April, such as crabgrass, goosegrass, green foxtail, and bluegrass. The late spring type is dominated by 1-year-old dicotyledonous weeds and occurs in mid-June. Such as purslane, alfalfa, plantain, etc.; perennial weeds are mainly Imperata cylindrica, Cynodon dactylon, Spire, Tian Xuanhua. Herbicides applied are broadly divided into two broad categories: soil treatment agents and stem and leaf treatment agents. The soil treatment agent mainly controls the early spring type and late spring type weeds to replace the urea class of chlordiazuron, green gluten, and triazene class atrazine, prometryn. In order to broaden the herbicide spectrum and reduce the dosage, it can also be mixed with 2,4-D and herbicidal ether. Both types of herbicides are absorbed by the weeds' roots and are transmitted through the body as transpiration flows, resulting in the inhibition of weed photosynthesis and death. The roots of fruit trees are generally distributed below 10 cm in the soil layer. These two types of herbicides have poor mobility in the soil and are not easily absorbed by the roots of fruit trees. Therefore, fruit trees are relatively safe. The method of application is when the spring weeds germinate and the soil is first loosed with water, and then use 25% chlorflubenzuto WP 0.4 kg/mu, 50% atrazine WP 0.5 kg/mu, 50% Praxanthine WP 0.3 kg/mu spray or poisonous soil, evenly applied to the surface of the soil to control the early weeds, spray better, and can induce seed germination. Or use 25% razepam WP 0.3 kg/mu +25% herbicidal WP 0.8 kg/mu, 25% herbicide 0.8 kg/mu +50% Atrazine 0.2 kg/mu, water consumption per mu 200 ~ 400 kg. Stem and leaf treatment agents mainly control perennial weeds, mainly paraquat and glyphosate. They are all water-absorbing herbicides with foliar treatment. They are absorbed by the leaves and flow along with the assimilation to the weeds and accumulate in the roots. , produce phytotoxicity, can kill all parts of the weeds on the ground and underground. The dosage depends on the composition of weeds, the growth height and density of weeds, and generally 20% paraquat in water per acre 1.5 kg, 40% glyphosate water 2 kg. Such herbicides have poor adhesion to weed stems and leaves, and surfactants such as detergent powder (about 0.3 to 0.5% by weight of the liquid) should be used. In the case of weeds under 15 cm, 40% glyphosate 1.5 kg/mu + 25% weedu WP 0.3 kg/mu, 20% water 300 ml/mu +50% atrazine Wet powder 0.4 kg / mu mixed, weeding effect will be better.