1. Broccoli seedling pests and diseases
The main pests and diseases of broccoli seedlings include rickets, blight, beet armyworm, Spodoptera litura and Flea. It is disinfected with 95% of the chlorogenic granules of 3000% of the chlorogenic granules, and seeded with 2.5% of the succulent suspension. The dosage is 0.1% of the seed weight, or 58% of the Rydmir can be used in the early stage of the rickets. Wet powder 500-600 times spray control; in the early stage of blight, 10% high water dispersible granules 1500 times spray control. Underground pests such as Flea are sprayed with 4.5% beta-cypermethrin emulsifiable concentrate 2000 times after sowing.
2. Agricultural control measures
Reasonable rotation, it is best to carry out water and drought rotation, or with non-cruciferous vegetables such as melons and beans. Secondly, the seeds are disinfected and the disease-free seedlings are cultivated. The seeds can be mixed with 2.5% of the seeds before seeding. On the basis of scientific land preparation and reasonable close planting, it is necessary to properly water and fertilize.
3. Biological control measures
Mainly to actively use biological pesticides, plant extracts, but also consider the use of ladybugs, spiders, Trichogram bees and other enemies.
4. Principles of chemical control of broccoli pests and diseases
According to the occurrence of diseases and insect pests, the right medicine, the rational use of medicine, the treatment that can be cured, and the treatment of the disease can not be cured. Rational use and alternate use of chemical pesticides, can not increase the concentration arbitrarily, accurately grasp the appropriate period of control, according to pest and disease reports, appropriate medication.
5. Principles for prevention and treatment of adult disease
Prevention and treatment of broccoli sclerotinia can be prevented by 1000% spray of 50% chlorhexidine WP in the early stage of the disease and at the beginning of the ball. The last dose is 10 days before harvest; the control of broccoli downy mildew can be in the early stage of the disease. It can be controlled by spraying with 72% Krussian wet powder 500-600 times; it can prevent broccoli black rot and soft rot, and can be rooted with 5% solution of 45% dexamethasone in the early stage of the disease. Control broccoli Plutella xylostella, beet armyworm, Spodoptera litura, 5% to 1500-2000 times spray with 5% Ruijin special water agent, treat both cabbage caterpillars and rapeseed meal; control broccoli leaf miner, choose 75% potential wettability Powder 3500 times spray control. When controlling broccoli aphids, you can use a 20% Confudo rich solvent 5000 times spray.
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