The leaves of greenhouse celery appeared yellowish water stain spots, and then a thick layer of white flocculent mycelia grew. Finally, the celery stems had black worm urea nucleus, which was a hazard to celery sclerotia. The disease is severe in cold, cold early, and hazy years.
Control methods: 1. Agricultural control. Before sieving, the sclerotia should be sieved or rinsed with 10% saline, and the sclerotia should be removed and washed after washing with clean water. The diseased plots were removed in time to remove the diseased plants in the field, and the diseased bodies were removed after the harvest and brought out of the fields to be buried or burned. The soil was deeply ploughed to accelerate the decomposition of the diseased body and reduce field pathogens.
2. Drug control. It was sprayed with 40% Shijiale Suspension 1000x, 50% Propionin WP 1000x, 50% Sulfonyl Wettable Powder 1000x, or 40% Sclerotium Net Wettable Powder 700x. The spraying began at the early stage of the disease and was sprayed once every 7 to 10 days and sprayed 2 to 3 times.
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