How to prevent rotten heart disease of broccoli in greenhouse?

The main conditions for the occurrence of rotten heart disease of broccoli in greenhouse are as follows: planting bacteria-carrying seeds has more opportunities and high incidence. With the high temperature of the soil in the greenhouse, the disease will occur seriously. The main preventive measures are:

1. Chemical seed dressing: seed dressing with new high-fat membrane before sowing can keep heat, keep moisture, absorb swelling, improve seed germination rate and make seedlings strong. Repelling underground pests and isolating virus infection. It can also be mixed with seed coating agent.

2. Chemical control: in the early stage of the disease, remove the diseased seedlings and spray them with medicine solution in time. When selecting agents, targeted agents must be used together with new high lipid membrane, which can transform high toxic pesticides into poisoning, poisoned pesticides to low toxicity, and low toxic pesticides to slight toxicity. Control the volatilization of pesticides, prevent the erosion of little Rain Water, reduce the dosage per mu (halved), and improve the control effect (many times).

3. Pull out the diseased seedlings: for the necrotic seedlings caused by rotten heart disease, they should be pulled out in time and treated outside the shed. After pulling out, the new high lipid membrane should be sprayed in time to form a layer of polymer membrane to prevent the disease from spreading and resulting in a reduction in production.