With the continuous deepening of agricultural structure adjustment and the promotion and application of light and simple cultivation techniques, the problem of fall planting in rapeseed fields in autumn has become a prominent problem. If the temperature is higher at the seedling stage, pests often occur again, and the timely use of pesticides will promote the development of rape in autumn and winter. Has an important role.
Chemical weeding
Before planting or transplanting the stubble rapeseed before sowing, use 200ml of 41% glyphosate per acre, or 200ml of 20% paraquat in water, spray with 30kg of water to eliminate the old grass.
Pre-emergence soil closed live-broad field or seedbed 2 days after sowing of cover soil, transplanting field 1 to 3 days before transplanting rapeseed after soil preparation, using 99.9% acetochlor EC 48ml per acre, or 35% isotrimoate acetochlor Wet powder 60 grams, add 50 kg of water spray to seal the soil, to prevent the germination of weed seeds. Rainfall should be promptly drained after application so as to avoid excessive humidity and phytotoxicity. For more rapeseed fields with early maturing, the soil sealing treatment is more important.
Post-emergence shoots and leaves were treated with stems and leaves after weeding in the 4-8 leaf stage of live rapeseeds, or before and after the 3rd leaf stage of transplanting rapeseed field. Weeds with grass-based weeds are sprayed with 24% clitorone EC 25 ml/water 30 kg/mu, and weeding can also be made with fluazifop, quizalofop, and flupirtine. Agent. The broad-leaved grass-based plots consisted of 50% grass-removing 30-mL suspensions per acre and 30 kg of water spray. For grass fields with mixed weeds and broad-leaved weeds, use 18% of refined quinoline to remove 100-120 ml of emulsifiable concentrate and 24% of clethodim EC, and add 30 kg of water to the spray.
Control pests
Choosing a field where cruciferous crops had not been cultivated in the past was used as a seedbed to clean the pasture before sowing and to remove dead leaves, weeds and weeds in the field and concentrate or burn them. Water before sowing to eliminate field pests. If the weather is dry, the underground pests are seriously endangered and can be watered for several days to mitigate the damage.
Locust locust sucking rape sap can cause growth retardation of seedlings, and also spread viral disease. Should have a seedling rate of 10% in the seedbed or live rapeseed field, and the average number of insects per plant is 1-2 sprays. Spray the seedlings 4 to 5 days before transplanting. Use 10% imidacloprid wettable powder 30 grams per acre spray with water.
After the emergence of rapeseed rape, pay attention to insect inspection, control the larvae before the third inhalation. Can be used 1.8% avermectin EC 2000 times, or 5% emamectin benzoate EC 4000 times spray.
Yellow song stripped adult beetles were sprayed with 40% chlorpyrifos EC 100 ml per mu, or sprayed with 18.1% beta-cypermethrin EC 2000 times. The larvae can be irrigated with 90% crystals of trichlorfon 1000 times.
Locust insecticide is used to prevent and cure pesticides at the initial stage of insect pests.
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