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The main pests and diseases of broccoli and their control measures:
1. Main diseases of broccoli:
1. Frosty mycosis: it is more obvious in the development process, the old leaves are the first to occur, the leaves are dry when dry, and the mold layer appears on the back of the leaves when wet. severe yellowing and shedding of leaves; The peduncle is infected, and the diseased part is easy to fold, affecting the fruit.
Control measures: choose varieties with strong disease resistance. The soil should be turned deep and whitened, and an appropriate amount of lime should be added.
At the beginning of the disease, spray with 600 800 times of 70% mancozeb wettable powder, or 400 600 times of methamphene. Discontinue the drug about 10 days before harvest.
2. Black rot: any part of the leaf forms amorphous light brown lesions, the edges often have yellow halos, and the lesions expand to the sides or inside, causing the surrounding mesophyll to turn yellow or die. Black rot is harmful to leaves and bulbs, and the cotyledons are infected with water and die quickly.
Prevention and control measures: The disease is mainly preventive, crop rotation should be implemented, and the planting density should be appropriate. Or spray with 72% agricultural streptomycin sulfate soluble powder, and stop using the drug 5 days before harvesting.
3. Soft rot: germs invade from the wounds of roots, stems and leaves. The base of the leaves suddenly turns yellowish-brown, and the lesions are water-stained, which gradually soften and decay.
Control measures: avoid cruciferous vegetables, strengthen field management, cultivate strong seedlings or choose 500 times of copper high, or 72 agricultural streptomycin 4000 times liquid spraying.
Second, the main insect pests of broccoli.
1. Aphids: Aphids, commonly known as worms, have many species and reproduce quickly. Aphids often swarm into groups to harm young leaves, flower buds, etc., some aphids have wings to fly, so it is a major way to spread the virus, once it is found that the application of drugs to prevent and control, the initial stage of the disease with 500-1000 times of the sophora ginseng lipid water spray, with 10-20 mg per mu, more than 7 days from the harvest.
2. Diamondback moth and cabbage worm: larvae eat mesophyll, which is prone to soft rot when harming flower bulbs, and insect feces will also pollute flower bulbs and reduce the value of commodities. Prevention and control measures:
In the early stage of the disease, use BT emulsion, or 500 800 times of green worm fungus No. 6 solution, or 1000 times of 50% phoxanthion emulsifiable concentrate, and spray it in case of rain after spraying.
3. Earthworms, snails, ants and other small animals: they can be booby-trapped by poisonous feeding, or 350 grams of 5% meta can be sprinkled.
4. Slug: 350 grams of 5 meta can be used per mu. Use low-toxicity, low-residue pesticide control, can not be sprayed after pregnant flower bulbs.
5. Rodent infestation: When there is rodent infestation, use manual or physical methods (such as electric cats) to prevent and control it, and do not use drugs.
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It is normal to have ants in flower pots at home, but it is still harmful to have ants indoors, it will steal and eat our food, spread bacteria, and we will easily get sick after eating. Whether it's on the balcony or indoors, as long as there are ants, we have to get rid of them or get rid of them. I have 3 reliable ways to get rid of or get rid of ants, and flower friends who have ants at home can try it.
1.Chase away the ants.
2.Kill the ants.
You can buy ant medicine, you can buy some for every flavor, put the medicine where the ants appear, and when the ants are full, they will move the medicine back to the nest, whether it is in a flower pot or an indoor burrow, as long as it is moved back to the burrow for the queen ant and the young ants to eat, they can be wiped out. It's still relatively effective.
3.It is to keep the room clean and ventilated, and there should be nothing to eat on the balcony, there is no food at home, and the ants will naturally move en masse.
Because there are ants in the house, if you change the flowers to the potting soil and do not destroy or drive away the ants, they will still climb into the pot again. Ants are more preventive than cure, as long as the cleaning is in place, it is not easy for ants to come to the house.
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