In recent years, the area of ​​sugarcane planted in the north has been expanding year by year, and the occurrence of weeds is relatively heavy. Due to differences in soil types, farming management, climate and other factors, there are many types of weeds, which are slightly different from other crops. In the spring, there is much drought and little rain in the north, and the weed damage is not serious, but the sugarcane seedlings are from May to June...
In recent years, the area of ​​sugarcane planted in the north has been expanding year by year, and the occurrence of weeds is relatively heavy. Due to differences in soil types, farming management, climate and other factors, there are many types of weeds, which are slightly different from other crops. In the spring, the north is dry and rainless, and the weed damage is not serious. However, from May to June, the sugarcane seedlings are weak, the weeds grow strongly, and the summer and autumn seasons are heavy. If not timely, the sugarcane will be seriously reduced. The use of chemical weeding saves labor by saving time and labor. According to the China Pesticide Network , the common herbicide varieties in sugarcane fields are: Atrazine, Diuron, Cimazin, Cao Cao Ling, Li Gu Long, Laso, Duer, Gai grass, Paraquat, etc., different seasons. The herbicides used are also slightly different.
First, the application of pre-emergence application after sowing, the main choice of herbicides are:
1.40% of atrazine suspension agent is applied before the emergence of sugar cane, 250-350 ml per acre, and the surface layer can be closed after spraying with water, thus effectively preventing annual monocotyledonous weeds and dicotyledonous weeds, and also for perennial weeds. Certain inhibition, the efficacy can last for 40 to 60 days.
2.50% simazine wettable powder is applied before the emergence of sugarcane, 200-300 grams per acre, sprayed with water, can effectively prevent weeds such as crabgrass, sedge, foxtail, and cockroach.
3.20% oxacillin emulsifiable concentrate is applied before sugar cane, and the dosage per acre is 125-150 ml, which can effectively remove annual monocotyledonous and dicotyledonous weeds, and the efficacy can last for 40-60 days.
4.25% diuron WP or 50% Degu WP can be used in 300-400 grams per acre. It can effectively prevent weeds such as foxtail, crabgrass, valerian, cocklebur, and cockroaches, and has certain inhibitory effects on perennial weeds. The efficacy period is 40 to 60 days.
5.72% Dole emulsifiable oil before the seedlings, 100-150 ml per acre, not only to control the annual grass weeds, but also have certain control effects on the broad-leaved weeds such as purslane, wild carp, carp, and so on.
6.80% of the grass WP can be used before the emergence of sugar cane, 250-300 grams per acre. It can effectively prevent weeds such as crabgrass, valerian, beefgrass, wild carp, and early-maturing weeds, but only has a certain inhibitory effect on perennial deep-root weeds.
Second, seedling stage pesticide weeding 1.40% atrazine suspoemulsion, when sugar cane seedlings grow to 3 ~ 5 cm, 250-350 ml per acre, mainly to control annual monocotyledonous and dicotyledon weeds, the efficacy period can be 40 ~ 60 days.
2.20% oxacillin EC. When the sugarcane seedlings are 3 to 5 cm long, 125 to 150 ml per acre, mainly to prevent annual monocotyledonous weeds and dicotyledonous weeds, and the efficacy is 40 to 60 days.
3.50% simazine wettable powder sugarcane acres 3 ~ 5 cm, 200 ~ 300 grams per acre, spray with water, can effectively prevent annual monocotyledon and dicotyledon weeds.
4.25% diuron WP or 50% Ligulong is applied at a height of 3~5 cm in sugarcane seedlings, 300-400 g per acre, which can effectively prevent crabgrass, foxtail, wild leek, cocklebur, cockroach The annual monocotyledonous and dicotyledonous weeds have a certain inhibitory effect on perennial weeds, and the efficacy lasts for 40 to 60 days.
5.48% bentazon water in the 4 to 6 leaf stage of sugar cane, 100 ~ 1.50 ml per acre, sprayed with water, can control the dicotyledonous weeds and sage of Xanthium, wild donkey, donkey, pig's head, purslane grass.
6.20% sulforaphane salt in the 4 to 6 leaf stage of sugar cane, 400-500 ml per acre, add water, lower the nozzle spray, for stem and leaf treatment, can effectively prevent the crabgrass, tendon grass, thousand gold, 稗Grass, articles, sorrel, foxtail and bermudagrass.
Third, in the middle and late period, weeds are used to treat weed stems and leaves. When sugar cane grows to more than 1 meter, if grass damage occurs in the field, 50% voltazone WP or 40% atrazine suspension can be used. 200-250 ml of mu medicine; or 4% sulforaxa water, 400-500 ml per mu; or 20% gram of trace water, 200-300 ml per acre, 40-60 kg water, low pressure nozzle Directional spray can effectively prevent a variety of weeds.
4. Interplanting sugarcane field weeding is applied after sugarcane uncovering film. Generally, herbicides such as ketone and sulforaphane sodium salt are used , and 20% gram of tracer water is used in 200-300 ml/mu; 20% sulforaphane sodium. The dosage of salt water is 400-500 ml per acre, 30-50 kg of water, and the directional spray is effective in controlling weeds.
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