Sheltered celery Sclerotinia sclerotiorum control
The expert Yan Jindong replied: According to the reader, his greenhouse celery is a celery sclerotium disease hazard. The celery sclerotium disease mainly damages the stems and leaves of the plants. At the onset of the onset of the leaves, the leaves initially produce light yellow water stains, and when the humidity is high, soft rots are formed, and a thick layer of white flocculent mycelium is formed. After the formation of the black rat fecal sclerotia, conditions are appropriate. Spread to petiole and stem. Stem infection, symptoms and leaf infections are similar, except that when the humidity is high in the field, dense white, flocculent mycelia, the diseased stem tissue is soft rot, and a round or irregular black rat fecal nucleus is formed. The sclerotia are white in the early period, and the outside becomes black and the interior is white. The bacteria prefers a warm and humid environment. The most suitable environment for the disease is the temperature of 15 to 25°C and the relative humidity of more than 90%. The most suitable period for the disease is the mid- and late-stage growth of plants. In autumn and winter, the incidence of cold, cold, and hazy weather is heavy. The continuous cropping land, low-lying terrain, and poor drainage are more serious; the planting is too dense, and the ventilation and light transmission are poor. Because of the cold crops and the excessive application of nitrogen fertilizers, the incidence of the disease is heavy. Control methods: Greenhouse Dutch Buckets,Dutch Bucket,Tomato Dutch Bucket,Plastic Dutch Bucket JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com
1. Agricultural control: Sieve before sieving, or use 10% saline to bleach, remove sclerotia and wash with water after sowing. 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: Use 40% Shijiale Suspension 1000X or 43% Haldex Suspension 4000-6000X or 50% Propionin WP 1000X or 50% Quickink Wet Powder 1000X or 25% Fast-acting wettable powder 600 to 800 times or 50% nellikon wettable powder 1000 times or 40% sclerotium net wettable powder 700 times or 50% ethylene sclerotia net dry suspension agent 1000 times and other drug control. In the initial stage of onset of spraying, spray every 7 to 10 days, and spray 2 to 3 times.