It is hot and rainy in summer, and weeds grow fast. In the nursery land, the early stage is mainly broad-leaved weeds, and the middle and late stages are mainly 1-year-old grass weeds. The young orchard of Xinyi is mainly composed of perennial weeds such as striated grass, thatch, thorn, and small convolvulus. There are also 1~2 year old weeds such as crabgrass, goosegrass, foxtail and purslane. The adult orchard is mainly composed of 1~2 year old grass weeds and broadleaf weeds, and there are also a small number of perennial weeds. Commonly, there are teff, wild oat, goosegrass, foxtail, shovel, and twigs. Purslane and so on. Therefore, herbicides should be used in time for chemical weeding.
10% gram of tracer (also known as paraquat)
It is a herbicide herbicide with fast killing speed. The stems and leaves will die after 1~2 days after medicine. It is mainly used to control weeds in 1~2 years. It can only kill the aboveground parts of perennial weeds, but on sedges. Weeds are less effective. Control the grass below 15 cm, use 150 ml of water per acre for 30 kg; control large grass of 20 cm or more, use 200~300 ml per acre for 50 kg of water, spray the weeds with directional spray, not Spray or drift the liquid onto fruit trees or other crops, otherwise phytotoxicity will occur.
10% glyphosate water (also known as Nongda, Zhencao Ning) is a systemic extractive herbicide that kills grass slowly, prevents weeds from 1 to 2 years, and leaves stems and leaves 15 to 20 days after the drug. Will die, to prevent perennial weeds, it takes 25 to 30 days for the stems and leaves to die, and the rhizosphere gradually rots. Control 1~2 years of weeds to use 650~1000 ml per acre and 30~40 kg of water. Control perennial deep root weeds 2000 ml per acre, 40 to 50 kg of water. The application method is the same as the gram tracer.
25% diuron WP can kill Matang annual weeds, choose 25% diquat WP WP 0.75 kg, add water 40~50 kg, treat stems and leaves or soil, can achieve good results.
50% simazine wettable powder (also known as simazine)
Selectively inducing soil-borne soil treatment of herbicides. It is not toxic to plant roots and has no effect on seed germination. Only after the nutrients in the seeds are exhausted, the seedlings die. The weeds showed signs of suffering 7 days after the application. It can be used to control perennial weeds of 1-year-old weeds and seed propagation, and the efficacy of controlling broad-leaved weeds in 1-year-old weeds is higher than that of grass weeds. Weeds have a good effect before they are unearthed and in the germination period. Use 50% wettable powder 150~250g per acre for water, and spray the soil surface from April to May. Since the residual effect of simazine has adverse effects on the growth of certain crops, especially when drought is low or the amount of medicine is large, although it is still toxic to sensitive crops every other year, such as wheat, barley, cotton, soybean, cruciferous Vegetables, etc.

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