Seedlings of summer corn in case of rain
Summer corn seedlings coincide with the rainy season, often with seedling blight, first causing the base leaves yellow, tip and leaf margins dry, and then gradually developed upwards and cause the heart leaf curl, causing serious plant death. The pathogen is mainly Fusarium moniliforme, and the seeds can carry the bacteria. The pathogen can also overwinter with the diseased body and cause initial infection. Bacteria can invade during the seed germination period, first make the seed roots and root tips brown, and then spread and lead to poor root development, and the formation of necrotic spots between the first section of the stem, causing the stem to be rot-like decay, easy to break, Leaf sheaths are also browned and torn. The occurrence of corn seedling blight is related to many factors (1) There is a difference in disease resistance among varieties, and the selection of seeds with small grains and weak bud potential will aggravate the occurrence of diseases. (2) The terrain is low, the soil is poor, the incidence of clay land and saline-alkali land is heavy, and the seeds are too deep to be susceptible to disease. (3) During the period from corn seeding to hair rooting, sudden heavy rains occurred in the soil and resulted in soil compaction. The soil temperature was low and the humidity was high. To prevent corn seedling blight, should pay attention to several aspects (1) Select resistant varieties. According to the survey, there are Yudan 2, Denghai 3 and Yuyu 22 with good resistance to production. At the same time, seeds with large grains and strong germination are to be used. (2) Seed treatment. Seed drying before sowing 1 to 2 days, and then soaked with 70% thiophanate-methyl WP 500 times liquid for 40 minutes, air dry and sowing. It is also possible to add 100 ml of water by adding 10% of 2.5% fludioxonil seed coating agent and apply 5 kg of seed dressing. (3) Reasonable fertilization and improvement of plant disease resistance. (4) Open a ditch to prevent accumulation of water. If seedling blight occurs in the corn field, medication should be taken promptly. Can spray 70% thiophanate-methyl WP 800 times, or 20% triadimefon EC 1000 times, or 95% fungal WP 3000 times, and spray twice. Can also be combined with medication, spraying alkaloids to enhance plant resistance, resistance to disease, and promote disease recovery. Large Mesh Belt Drying Machine Drying Machine,Belt Drying Machine,Food dryer machine,Mesh Drying Machine Zhucheng Tongxi Commercial And Trade Co.,Ltd. , https://www.blackgarlicgroup.com