1. Symptoms of melon anthracnose can cause damage to melon leaves, stems and fruits. After the seedlings become infected, irregular dark necrotizing lesions will appear on the true leaves and cotyledons of the seedlings. The edge of the lesion is haloed, and the base of the stem is mainly water stained necrosis. When the disease occurs at the adult stage, the leaf lesions are close to round, with water stains on the edges, and at the later stage, the lesions rupture. When the stems and petioles become infected, they will produce nearly round, concave lesions. If the fruit is infected, the lesion will sag and crack, and in the later stage, a sticky substance will also develop at the lesion. 2. Incidence characteristics The pathogens of melon anthracnose will remain in the form of mycelium in the soil and overwinter on the melon disease residues. Then, in a suitable environment the following year, conidia are produced as the source of initial infection and the inoculum is re-infected. Can be spread by rain, air, etc. In addition, pathogens can also overwinter on seeds, causing seedlings to develop disease through the seeds. In a high temperature and high humidity environment with a temperature of 25 degrees and a humidity of about 90%, it is very conducive to the onset. The disease is more serious in plots such as continuous cropping, excessive nitrogen fertilizer, and low-lying land. 3. Prevention and control technology Before planting melon, first of all, you need to select a suitable planting variety according to the planting area. Then the seeds need to be soaked in warm water at about 60 degrees for a quarter of an hour, at the same time, the seeds can be coated and sown with the seed coating agent. If the disease is severe, then rotate with non-melon crops for at least three years. In planting, we must strengthen the management work, mainly based on soil testing and fertilizer, and apply fully decomposed fertilizer. Level the soil to avoid sudden accumulation of water. Drainage should be done after rain, the planting density should be reasonably controlled, and weeding should be done regularly. At the time of planting, we must also pay attention to disinfect the soil. Disinfectant can be used with anthrax, carbendazim, carbendazim and other agents, evenly mixed with the fine dry soil, and then applied by furrow application or hole application to eliminate pathogens in the soil. When planting, the cultivation technology is mainly covered with plastic film, and water-saving irrigation is mainly based on water-saving irrigation such as drip irrigation. Before colonization, it is necessary to carry out a general defense with a chemical to reduce the number of pathogens in the field. After the onset of disease, the diseased plants should be removed in time to prevent water accumulation in the field, strengthen ventilation, and reduce the temperature and humidity in time to avoid the spread of the disease. 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 Household Clearing Nitrile Gloves Household Clearing Nitrile Gloves,Safety Nitrile Gloves,Oilproof Nitrile Gloves,Household Gloves Prevent Allergic Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshihealths.com