1. Downy mildew: At the beginning of the disease, it can be used as a botanical fungicide 1.5% matrine solution, 80% dimethomorph water dispersant, 40% aluminum diphosphonate 800 times, or 58% metalaxyl manganese zinc 500 Float spray and other leaves; onset of severe frost urea manganese zinc foliar spray once a week, even spray 2 or 3 times.
2. Viral disease: At the beginning of the disease, use plant-based fungicide 0.5% lentinan liquid, 20% virus A400 times liquid spray, interval 7 days, even spray 3 times, or use 1.5% of plant disease Ling emulsion 400 ~ 500 times liquid spray , spray the second time every other day, spray the third time 7 to 10 days, can effectively prevent viral diseases.
3, soft rot: At the beginning of the disease, use plant-based bactericide 5% allicin microemulsion, 3000 times agricultural streptomycin or neophytin 4000 times spray, spray once every 10 days, continuous control 2 ~ 3 Times. 72% of agricultural streptomycin 3000-4000 times solution or neophytin 4000 times solution can also be used to irrigate the roots. Severe diseased plants are found to be removed in time, and a layer of quick lime is sprinkled on the root soil to avoid mutual infection when watering. It can also be sprayed with potassium permanganate 800 to 600 times for 3 to 4 times from the seedling stage of Chinese cabbage to the rosette stage, which can effectively prevent soft rot and cure downy mildew in Chinese cabbage.
4, clubroot disease: 70% per acre with WP WP 2 to 3 kg, add fine soil 50 kg mixed into the soil, sowing before the ditch application or acupuncture, can also be used 70% pentachloronitrobenzene Wettable powder 800 times, or 50% thiophanate-methyl wettable powder 500 times Irrigation roots, 0.3 ~ 0.5 kg per strain solution.
5, bacterial spot disease: including bacterial angular spot and bacterial black spot. At the beginning of the disease, the plant-derived fungicide 5% allicin microemulsion, 72% agricultural streptomycin-soluble powder 3000-4000 times solution, or neomycin-containing soluble powder 4000 times solution spray, 40% ceramide copper metalaxyl WP 600 times liquid, 50% gain WP 800 to 1000 times, 80% mancozeb WP 500 times, 58% methosulfur Wettable 500 times and so on, alternate rotation.
6, black rot: the early onset of spraying 75% chlorothalonil WP can be 600 to 800 times the liquid, or neophytin 4000 times liquid, 50% metalaxyl copper succinate WP.
7, aphids: available plant insecticide 1.5% matrine solution, or 10% imidacloprid WP 1000 ~ 2000 times, 50% anti-inferiority WP 4000 ~ 8000 times spray control, or Physical control yellow control.
8, yellow striped jumper: use 90% trichlorfon 1000 times or 50% phoxim EC 1000 times foliar spray or irrigation root control, or physical prevention and control of a jumper and sticky board control.
9. Pieris rapae, Plutella xylostella, Brassica juncea, Spodoptera litura: available plant-derived pesticides 2% pyrethrin aqueous emulsion, 1% celangulin water emulsion, 5% chlorfluazuron EC 2500 or 2.5% Kill 800 times liquid spray, or physical prevention and control of pheromone lure plus trap, intelligent insecticidal lamp to control.
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