First, the hazard characteristics
Sclerotinia disease can damage the leaves, petioles, and stems of celery. Generally, the first disease of the leaves begins with a dark stain, and the surface of the white mold layer is dense when wet. Then spread downward causing petiole and stem disease. The affected area was brown water-stained, and soft rot formed when the humidity was high. White hyphae grew on the surface. Finally, the stalks rotted into fibrous shapes. The stalks were hollow, forming rat worm-like black sclerotia.
Second, the incidence of the law
The pathogen spreads by wind and rain, infects the old leaves whose life is weakened, and the diseased leaves and leaves touch the strong leaves and stems to spread the mycelium. High temperature and humidity are conducive to the occurrence and epidemic of the disease. It is easy for celery to connect with fleas or cruciferous vegetables that are prone to sclerotinia. Drainage is poor, and the incidence of partial nitrogen fertilizer is heavy.
Third, control methods
1. Agricultural control: Implement rotation for more than 3 years. Seed disinfection before sowing. Drain the water in time to reduce the humidity in the field. The diseased leaves were removed from the fields in a timely manner, concentrated deep, and prevented from spreading.
2. Chemical control: spraying 70% thiophanate-methyl wettable powder 600 times liquid, 50% carbendazim wettable powder 500 times liquid or 65% triamcinolone wettable powder 1000 times, 5-7 days spray Shi once, continuous prevention and treatment 2-3 times. The above pesticides are used alternately to avoid drug resistance.
Cooling Agent, is a general term for all the chemicals that can produce cooling effects and are not strong. The most common Cooling Agent is menthol (especially L-menthol), but it should not be used in large quantities due to its strong odor and strong irritation to the skin, mucous tissue, and eyes. Therefore, many scientists have synthesized and extracted a new generation of cooling agent.
WS-23,flavor,Menthol,WS-5,Koolada,WS-12
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