With the adjustment of agricultural structure, the growing area of ​​rapeseed has been expanding year by year. The occurrence of diseases and insect pests has also increased year by year, such as damping-off, anthrax, virus, late blight, gray mold, powdery mildew, scab, locust, cotton boll. Insects, Spodoptera exigua, B. tabaci, etc., directly affect the yield and quality of rapeseed. In order to ensure the high yield and high quality of rapeseed, the pollution-free control techniques for the different growth stages of rapeseed are described as follows:
I. Prevention before sowing to sowing
1, adjust the planting structure, a reasonable rotation down. Avoid continuous cropping with melons and solanaceous vegetables. Rotate with cruciferous cabbage and Chinese cabbage; scallions of the lily family, garlic, etc. for more than three years.
2, choose resistant varieties. Such as Haijiao No. 2, Zhongjiao No. 4, Zhongjiao No. 5, Zhongjiao No. 6, Zhongjiao No. 7, Zhongjiao No. 8, Sweet Pepper No. 3, Sweet Pepper No. 4, Sweet Pepper No. 6, and Juice No. 1 Peijiao No.9, Fengjiao No.1, Dujiao No.1, Jinjiao No.8, Lisheng Jiechun, Champion Green Pepper, Precocious No.1 and so on.
3, seedbed disinfection. Can be used 50% carbendazim 1:100 Toxic soil 1 kg/m2 Subsidiary or 75% Thiophanate-methyl 10 g/m2 plus a small amount of soil Mixing applicator or 1 gram per square meter with Green Hunter 1 300 times of water, evenly sprayed in the bed before or after sowing, or 1 gram of Greenhenge 1 to 15 kilograms of sieved fine soil, dubbed toxic soil, spread 1/3 of toxic soil in the seedbed The remaining 2/3 of the toxic soil was planted after planting.
4, drug seed dressing. For each kilogram of seeds, 1-1.5 g of Greenhenge No. 1 and 3-4 g of 50% thiram WP or 8-10 g of Green Hunter No. 3 were mixed and then sowed.
5, pharmaceutical soaking. Soaking with 10% tribasic sodium phosphate solution for 30 minutes or 100 times formalin soaking for 30 minutes or 50% carbendazim 500 times soaking for 2 hours.
Second, sowing to the fixed period
1. Use 75% thiophanate-methyl 600-800 times liquid or 75% Baiyinqing 1000 to borrow to prevent dampness; 72.2% Precic 5-7.5ml/m2 spraybed to prevent and cure the disease. Treating early blight and anthrax.
2, in the seedbed period every 667 square meters with a piece of pepper room two bags or grams of sickness 500-800 times liquid, or virus A wettable powder 4m times spray, to prevent virus disease, spray it again every 7 days, even spray 3 times, can receive good results.
Third, colonization to the result period
Use 50% to avoid fog or 10% acetamiprid 5g/(mu) to control aphids of water 40kg, and to treat cotton bollworm; alternately use Dt emulsion 400ml/(mu), or use 2billion PIB/ml of cotton bollworm nucleus Polygonal virus suspension 50-60 ml / (mu) control of cotton bollworm, and cure tobacco budworm, aphids. In the pre-morbidity and early onset of the wilt disease, the roots were irrigated with 3000 gram of Green Hunter No. 1, or 600 times of Green Hunter No. 2 or 1500 to 2000 times of Green Hunter No. 8, or 500 times of Green Pepper No. 2 sprayed or rooted. , every 1 to 7 days, 1 to 2 consecutive times, and other diseases. The virus disease can be used to plant a disease 1000-1500 times liquid, or use A600 times the virus, or with 2% Zhongnanmycin 300 ~ 400 ml / (mu) spray, the effect is significant.
Fourth, the outcome period
1. Prevention and control of diseases in the field at the beginning of the disease, spraying 75% thiophanate-methyl 600m800 or 40% carbendazim 400-600 times, or 600 times that of anthraquinone; prevention and treatment of anthrax, powdery mildew, disease, etc. With 72% of agricultural streptomycin 2O g / (mu), or 25% wampens wettable powder, control bacterial scab: with 72% Precive water, or 30% of venom agent 800 times. Or 70% mancozeb WP 500 times to control fusarium wilt and gray mold; use 20% virus A or 1.5 phytosanitary WP 500 times to prevent viral disease; use 72% Kelu wettable powder 600-800 times liquid, or 77% can kill WP 500 times to prevent late blight, M. blight, cotton rot, etc.; can be used to protect the ground 5% cream g dust. Or 5% propamocarb dust, or 5% chlorothalonil dust 1 kg/(mu) dusting to prevent various diseases.
2. Prevention and control of pests: 1 Spraying of low-age larvae: Use 3,000% of avermectin 0.9% to prevent and cure tea saponins; use 10% Dagongchen WP 1000 times to control locusts: Use 2.5% Kung Fu Emulsion, or 10% Imidacloprid EC, or 4.5% beta-cypermethrin EC, is 1500 times effective against aphids, cotton bollworms, tobacco budworms, beet armyworms and L. sativae. It is sprayed 10 times every 5-7 times and sprayed three times. (2) Physical control: Yellow or yellow tube traps can be set in the protected area to trap whitefly, whiteflies, aphids, and liriomyzae and other yellow pests that have tropism toward yellow, or silver-gray mulching membranes to repel aphids. 3 Biological control: actively protect and use natural enemies, and when the adult whiteflies are found, they can release Lygus sinensis; biological agents, 1.8% sulphate soluble water agent, or 2% bactericide (Ningnanmycin) , Or 72% of agricultural streptomycin sulfate soluble powder, or 5% stuck Ke EC and other biological agents to control pests and so on.
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