1 Biological characteristics of garlic
The genus Liliaceae belongs to the genus Liliaceae and its biological characteristics are between the crops of the Gramineae family and the broad-leafed crops and are sensitive to many herbicides. It has a long growth period, sowing from the end of September of the same year to the beginning of October, and harvesting is completed at the end of May of the following year. After nearly 8 months, it will coexist with a variety of field weeds. Garlic is basically grown as a phosphorus stalk in Guangshui City. It takes about 10 to 15 days from sowing to emergence to grow slowly. Years ago, the growth was slow, and the temperature rose and grew rapidly after the year. According to these characteristics of garlic, in the selection and application of chemical herbicides, different agents can be selected according to different time periods and different grass phases.
2 Selection and application of herbicides in different stages of garlic herbicides
2.1 Before seedling after sowing
After sowing, it takes 10 to 15 days for garlic to emerge, but generally shallow weeds can germinate between 5 and 7 days. According to this characteristic, some pre-emergence treatment agents can be used, which is still safe for garlic.
2.1.1 Dole: Use 150 ml every 667 ml. The method is the same as above, and the control effect and control time are equivalent to those of the pull cable.
2.1.2 Gore (containing garlicgrass, cut grass, etc.): 80～100ml for every 667ml, 5～7d after sowing, spraying 100kg water, 30d after medicine, the control effect can reach 90%, after medicine 50d, control effectiveness is about 60%.
2.1.3 Shi Tianbu: 200ml for every 667ml, 5～7d after sowing, spraying 100kg of water, 30d after medicine, the control effect can reach 95%. After 50d, the control effect still has more than 80%.
2.2 After emergence (2 leaves after 1 heart)
2.2.1 garlic fields dominated by grass weeds
1) Steady killing: Weeds are treated with stems and leaves, with lOOOml/667ml, water spray 50kg, and the control effect against gramineae can reach 85% or more after 30 days, and the efficacy is still above 75% after 50 days.
2) High-efficiency grass energy, weed and leaf treatment of weeds, 30 to 40 ml per 667, spray water 50, control effect and precision stability to kill quite.
2.2.2 The garlic field is dominated by broad-leaved weeds or broad-leaved weeds and grasses.
1) Gore: Spray 80 to 100 ml per 667 gram of water (150 ml of garlic grass) to spray 30 pairs of weeds. After 30 days of treatment, the efficacy is up to 90%. However, the broad-leaved weeds do not kill roots. After 20 days, Rejuvenate; control efficacy of grass weeds is only about 50%. It has an effect on garlic, causing the leaves of garlic to drape and the leaves to be greenish. It takes about 15 days to recover.
2) Shi Tianbu: For every 667 tons, apply Shi Tian to make up 200 ml, and spray 50 kg of water. After 30 days, the effect of control is more than 90%. After 50 days, the efficacy is still above 70%, and it is safe to garlic, after 50 days. The second prevention can be performed.
2.3 Plastic film garlic
After sowing film, can be used cable, Dole, Shi Tianbu, garlic grass net spraying after sowing, the effect is good.
After the film was sown and sprayed with the above-mentioned agents, the film was sown again. Because the density of the garlic was sown, the soil turned greatly and the effect was reduced.
3 garlic herbicides at different stages of grass selection and application of views
3.1 Because of the differences in climate, soil and field environment between the north and the south, some herbicides that are used very well in the northern garlic area are not necessarily very good in the garlic area of ​​the southern rice fields. This is mainly due to the fact that the north is a dry land and the soil is loose. Fine, the south is paddy soil, the soil is difficult to fine, and it is difficult to spray the liquid below the soil block. On the other hand, in the north, there is little drought in winter, while in the southern winter, there is a certain amount of precipitation. The southern weeds grow more easily than the north.
3.2 When applying pre-emergence pesticides, the soil moisture must be considered. Apply the pesticide to the water and increase the amount of water in the drought. When it is wet, it can be appropriately reduced, but it should be sprayed. It is best to irrigate after sowing. See white when spraying.
3.3 stem and leaf treatment, weeding through the weeds, so that the effect will be better.
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