1. Seedlings 1. Too deep sowing: Generally the sowing depth is 4 ~ 5cm, the soil moisture is better, so it can be shallowly planted. When the soil moisture is poor, it should be planted deeply, but the depth should not exceed 10cm. Take the method of picking soil and putting seedlings to prevent lack of seedlings and ridges. Generally, the soil should be grooved along the ridge. When grooving the soil, it should be light to prevent the buds from breaking and affecting the emergence of seedlings. 2. Mulching: no matter whether it is mulching after mulching or mulching while mulching, the sowing holes and seeds will not be in the same position. Common seedlings curl under the mulch. If the seedlings cannot be released in time, it will easily cause high temperature burning under the membrane Seedlings, so the seedlings should be released with ridges in time. 3. Seedling supplementation: The seedling shortage rate exceeds 10%, and measures must be taken to increase the number of plants in the field. When replanting seedlings, only those with a shorter growth period than the original varieties can be replanted. When conditions permit, it is best to adopt bud regeneration. Second, spray herbicide When spraying, pay attention to the weather conditions. Do not spray under windy or rainy conditions. Spraying at low temperature will weaken the efficacy. Generally, spraying is not done before 8 am. Once the severity of the phytotoxicity occurs, spray brassinolide or add amino acids. 1. Spraying before seedling: spraying on the day after sowing, or on the second and third days, depending on the soil surface humidity when spraying, the spraying effect is poor under drought conditions, if it is sprayed manually with a sprayer, it should be reversed Go away to prevent artificial damage to the drug film. 2. Spraying after seedlings: The time of spraying should be in the 3 ~ 5 leaf stage of corn. 3. Pest control Insect pests are one of the important reasons for the lack of seedlings and ridges, so we must pay attention to pest control at the seedling stage. 1. Ground tiger: eating corn roots and stems, resulting in lack of seedlings and ridges. Preventive measures: â‘ Extermination of wasteland and weeding. â‘¡ Use coated seeds. â‘¢ You can spray chlorpyrifos. 2. Grubs: underground pests that bite the roots of corn, resulting in lack of seedlings and ridges. Preventive measures: â‘ Use coated seeds. â‘¡When plowing the land, mix 1500g of 50% phoxim emulsifiable concentrate with 1500g of fine sand or fine soil or 375-450kg of mixed soil to turn it into the ground. 3. Mole cricket: an underground pest that eats young corn roots, and shuttles back and forth to break off the young roots. Preventive measures: â‘ Use coated seeds. â‘¡ Poisoning by poison bait and poison valley. 4. Disease prevention 1. Seedling blight: There are many ways of initial infection of corn seedling blight, early onset, fast plant death, and difficult control. Therefore, it is necessary to base on agricultural measures and carry out comprehensive prevention and control based on seed disinfection. â‘ Select disease-resistant varieties and implement seed coating. Especially for plots that are prone to disease all year round, avoid planting susceptible varieties. Use mature and high-quality seeds to avoid planting immature, frosted, mechanically traumatized, improperly handled and stored seeds. â‘¡ Deeply turn over the stubble and level the land. After the corn is harvested, it is necessary to turn over the stubble in time to promote the decomposition of diseased bodies, inhibit the propagation of pathogenic bacteria, and reduce the amount of soil bacteria. Before sowing, it is necessary to carefully prepare the ground, prevent water accumulation, promote root development, and enhance plant disease resistance. Rotating crops should be arranged as reasonable as possible, and non-corn stubble crop rotation. â‘£ Fertilization at a reasonable ratio. Increase the application of phosphate fertilizer, timely plowing the soil, increase the ground temperature, promote root development, and improve plant disease resistance. 2. Mosaic virus disease: Corn mosaic disease is mainly caused by aphids, and can be infected during the entire growth period of corn. There are several preventive measures. â‘ Control aphids. Corn should vigorously promote coated seeds, or in the peak period of aphids migration, spray pesticides in time to control, eliminate aphids before the flight, reduce the virus vectors, and organize the farmers to contiguous patch to eliminate. â‘¡ Strengthen field management. When corn is sown, increase the sowing amount appropriately. After emergence, find the infected plants and remove the diseased plants in time, which has a significant effect on controlling field spread and reducing disease prevalence. While adding organic fertilizer, nitrogen, phosphorus and potassium fertilizer should be used together. Increasing the number of cultivating and weeding, cultivating soil and protecting soil moisture to promote the healthy growth of corn. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Hydrocolloid Plaster,Hydrocolloid Plasters,Hydrocolloid Plasters For Spots,Hydrocolloid Plasters For Burns Zhejiang Lanhine Medical Products Ltd. , https://www.lanheyiliao.com
â‘¢Add rotted organic fertilizer. It is strictly forbidden for raw manure to go to the ground, to block the way of fertilization and reduce the incidence of disease.
Corn Seedling Four Management