Recently, the area of ​​cultivated sugar cane in northern China is expanding year by year, and weeds are also more serious. Below, the author tells you how to kill weeds in sugar cane fields.
   First, medication before emergence after sowing
   In this period, the use of herbicides for injection is:
   After 1.4% suspension of atrazine applied before emergence of the sugar cane, the dosage per acre between 250 ml to 350 ml of water was added closable spray the soil surface, and thus efficient control annual monocotyledonous weeds As well as dicotyledon weeds, it also has a certain inhibitory effect on perennial weeds, and the effect of the drug can last for 40 days to 60 days.
   Simazine WP 2.5% of cane before emergence application, in the dosage of 200 grams per acre to 300 grams, add water spray, can effectively control Digitaria, Cyperus, Setaria viridis, Polygonum weeds .
   3.2% of the oxalic acid emulsifiable concentrate is used before sugar cane, and the dosage of 125 ml to 150 ml per mu can effectively prevent annual monocotyledonous and dicotyledonous weeds, and the efficacy can last for 40 days to 60 days.
   Second, the use of pesticides in the seedling stage
   One-fourths of arsenic suspoemulsion, when the sugarcane seedlings grow to between 3 cm and 5 cm, the average dose per acre is 250 ml to 350 ml, mainly to prevent annual monocotyledon and dicotyledon weeds. The validity period will last from 40 days to 60 days.
   2.8% of the grass emulsifiable concentrate, when the sugarcane seedling grows to a height of 3 to 5 cm, the average dosage per acre is 125 ml to 150 ml, mainly to prevent annual monocotyledonous weeds and dicotyledonous weeds. Will reach 40 days to 60 days.
   When 3.5% of the simazine sugar cane is 3 to 5 cm, the average dosage per acre is 200 to 300 grams. Adding a water spray can effectively kill the annual monocotyledonous leaves in the dicotyledonous weeds.
   Third, in the middle and late growth period
Use herbicides to orient the weed stems and leaves. When the sugar cane grows above 1 meter, if there is grass damage in the field, you can use 50% of the fluconazole WP or 40%. Atrazine suspension, an average of 200 ml to 250 ml per acre ; or 4% of sulforaphane, 400 ml to 500 ml per acre ; or 20% The tracer is used in an amount of 200 ml to 300 ml per acre , and 40 to 60 kg of fresh water is added . The nozzle is sprayed down to perform directional spray, which can effectively prevent a variety of weeds.
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