It is winter now, and there are frequent low-temperature rains and snow. After strong cooling and snowfall, how to strengthen field soil and fertilizer management to recover losses? Soil and fertilizer management reduces the impact of freezing damage For crops suffering from freezing damage, you can apply super-large amounts of potassium dihydrogen phosphate, spray plant growth nutrient solutions, and use organic water-soluble fertilizers and other products and technologies to improve crop resistance and resistance, and lay a solid foundation for the restoration of growth. In addition, fertilizer-deficient plots should be topdressed with quick-acting nitrogen fertilizers as soon as possible according to the growth of crops, and appropriate amounts of phosphorus and potassium fertilizers should be applied to promote crops to resume growth as soon as possible. Supplement nutrition to enhance crop resistance Winter wheat has strong vitality. After freezing damage, apply quick-acting nitrogen fertilizer immediately, apply 5 to 7.5 kg of urea per acre, combine watering, cultivating soil loosening and soil moisture to remedy, and do a good job of foliar fertilization and pest control in time. In order to promote the growth of branches, rapeseed generally apply 5-7 kg of urea, 3-4 kg of potassium chloride or spray 0.2% potassium dihydrogen phosphate solution, or apply a compound fertilizer with higher nutrient content. After plucking the stalks, fertilize appropriately according to the situation, and topdressing 5-7 kg of urea per mu to promote the growth of branches. In addition, about 50 kg of 0.1% to 0.2% boron fertilizer solution is sprayed on each mu of foliage to promote flower bud differentiation. Facility vegetables For unharmed or less affected vegetables, spray 0.2% potassium dihydrogen phosphate solution 2 to 3 times as appropriate; spray 0.3% urea solution 2 to 3 times for nitrogen-deficient plants. Even if nitrogen fertilizer is applied, cover the soil after application to avoid ammonia volatilization and burning seedlings under closed conditions. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
Insect pheromones are compounds used by insects to represent various information such as aggregation, foraging, mating, and alerting. They are the chemical molecular language of insect communication. At present, the basic control measures for pests in agricultural production mainly rely on chemical pesticides, but the long-term uncontrolled use of chemical pesticides has brought many side effects. The first is the emergence of pest resistance, which causes the use of drugs and drug concentrations to increase, the cost increases year by year, and the prevention and control of increasingly difficult; the second is to disrupt the ecological balance, while controlling a large number of natural enemies were killed, causing the pupae of secondary pests; Third, it pollutes the environment. A large amount of pesticides remain in crops, soils, rivers, lakes, and seas, and they are enriched in the human body through the form of food chain, causing another harm to humanity. Therefore, relevant research departments in many countries are currently working hard to explore and study new approaches and technologies for pest control. These studies include: the development of new, efficient, environmentally friendly, low-toxic, low-residue chemical pesticides; natural enemy insects and microorganisms The use of pesticides; insect sterilization technology and the application of insect hormones; among them, the research on the use of insect hormones, especially insect sex pheromones for pest control, is receiving increasing attention and attention.
Research on insect pheromone has been developing rapidly. Since the first insect pheromone Bombykol, has been isolated and identified, more than 2,000 insect pheromones and their analogs have been identified and synthesized worldwide, of which more than 100 insect pheromone To achieve commercial production, the production and research of Lepidoptera sex pheromones is the most extensive and comprehensive.
Insect communication, Including Sex pheromone, Collection pheromone,Alert pheromone, Tracking pheromone Taizhou Volsen Chemical Co., Ltd. , https://www.volsenchem.com
Ingenious use of fertilizer to reduce the influence of freezing damage
Pheromone is a collective name for compounds that play a role in chemical communication between organisms, and which is the chemical molecular language of insect communication. Including sex pheromone, collection pheromone, alert pheromone, tracking pheromone, altruin, altruin, synergistic pheromone, evacuation pheromone. Pheromones are chemical substances that interact with each other and can affect each other's behavior, habits, and even development and physiological activities. Pheromone is produced by the glands in the body and is directly discharged to the outside. The pheromone is transmitted to other individuals by means of air, water and other conductive media. Pheromones are found in lower animals and higher mammals. Because the pheromone is transmitted by the external environment, it is also called pheromone. Chemical substances that interact between different species are called interspecies pheromones or heteropheres.