Papaya tree cultivation: what is papaya brown rot

What is papaya brown rot? Is there any way to prevent and cure it? Please introduce the harm of papaya brown rot: Brown rot mainly harms fruits, but also flowers and tender shoots. Fruit disease, the initial brown nearly round small disease spot, and then with the development of the disease, the disease spot continues to expand, when the conditions are suitable, the disease spot quickly expand the whole fruit surface, and gradually extend to the pulp, serious, make the whole fruit rot. After losing water, the diseased fruit turns into a brown stiff fruit, hangs on the branch and does not fall for a long time. The bacteria on the pedicel or fruit invade the branch, form brown ulcer spot, affect the normal transport of nutrients and water, inhibit the growth and development of the branch, and cause the branch to die. The cause of papaya brown rot: Brown rot is a fungal disease, the pathogen overwinters on the stiff fruit, and the pathogen on the diseased branch can also be infected after overwintering. In the following spring, after the temperature rose, the bacteria on diseased fruits and branches produced conidia, which were spread by wind and rain. Around the first ten days of May, when the young fruit was formed, the bacteria mostly invaded from the fruit wound. Therefore, if the insect pests are serious, the brown rot will be serious. In the years with early or more rainfall, the disease is early and serious, the cultivated land is low-lying, vulnerable to waterlogging, and weak trees are also suitable for the disease. During the fruit expansion period, in case of natural disasters such as strong wind, torrential rain and hail, there are many wounds on the fruit surface, which is also conducive to the invasion of germs. Control methods of papaya brown rot: 1. Treatment of papaya brown rot: after harvest, combined with winter pruning, diseased branches, diseased fruit, concentrated burning, can effectively reduce the source of overwintering bacteria. 2. 2. Chemical control methods of papaya brown rot: spray Baume 5 degree stone sulfur mixture once before papaya germination in early spring; after blossom of papaya in March-April to before fruit harvest, spray 50% carbendazim 500 times or 50% methyl topiramate 800 times every 10-15 days, even 2-3 times, and can also treat leaf diseases. 3. Prevention and control of papaya brown rot: peach borer is an important pest that harms papaya fruit. In mid-late June, when the papaya fruit is enlarged, the female moth lays eggs in the cavities and cavities of the fruit. After the larvae hatch, they bite through the pericarp and eat into the fruit. It not only eats flesh vertically and horizontally, but also causes insect wounds, which is conducive to the invasion of bacteria. Control methods: during the larval incubation period, spray 1000 times of crystal trichlorfon or 1500 times of fenitrothion emulsion, once every 7 days, for 3 times. Click to get more papaya tree planting techniques click to get more fruit planting techniques