1. Broccoli seedling pests and diseases
The main pests and diseases of Broccoli seedlings include damping-off, blight, beet armyworm, Spodoptera litura, and fleas. Disinfect the plants with 95% Greenhenge No. 1 WP 3,000 times soil and seed dressing with 2.5% Siyogen suspending agent at a dosage of 0.1% of the seed weight, or 58% of the seed weight at the onset of damping off. Wet powder 500 to 600 times spray control; Rhizoctonia at the beginning of the disease with 10% Shi Gao water dispersible granules 1500 times spray control. Ground pests such as the armored beetle are sprayed on the ground with 2000% of 4.5% high efficiency cypermethrin cream after sowing.
2. Agricultural control measures
In a rational rotation, it is best to use crop rotations, as well as rotations of non-cruciferous vegetables such as melons and beans. Secondly, seed disinfection, cultivating disease-free strong seedlings, seed dressing before the seed can be used 2.5%. On the basis of scientific land preparation and rational close planting, we must rationally water and fertilize.
3. Biological control measures
It is mainly the active use of biological pesticides and plant extracts, and the use of ladybugs, spiders, and Trichogramma can also be used to eliminate the enemy.
4. Principles of chemical control of broccoli pests and diseases
According to the occurrence of diseases and insect pests, prescribe the right medicine, rational use of medicine, can not rule the rule of governance, can cure both governance. Rationally use and alternately use chemical pesticides, do not arbitrarily increase the concentration, accurately grasp the appropriate period of control, according to pest and disease monitoring, appropriate drug use.
5. The principle of disease prevention in adult plants
Prevention and cure of broccoli sclerotiorum can be controlled with 50% prohexine WP 1000 times in the initial stage of disease and in the early stage of anabolism. The last time is used for 10 days before harvesting; the control of broccoli downy mildew can be at the early stage of disease. 72% Kelusi wet powder spray control 500 to 600 times; prevention and control of broccoli black rot, soft rot, can be used at the beginning of the disease with 45% Daisen ammonium water solution 1500 times rooting. Prevention and control of broccoli Plutella xylostella, Spodoptera exigua, Spodoptera litura, can use 5% Rui Jin special water agent 1500 ~ 2000 times spray, and cure cabbage caterpillar, vegetable lice; prevention and control of broccoli leaf miner, can choose 75% of the wettability Powder 3500 spray control. When controlling broccoli aphids, it is possible to use 20% Confomed Solvent 5000 times spray.
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