Detailed Explanation of Common Pomegranate Disease Identification and Control Methods
Pomegranate cultivation is mostly concentrated in the tropical and temperate regions of our country, but with the development of modern cultivation techniques, greenhouse technology now makes it possible to grow them in other regions as well. Although the growing environment has been largely solved, many problems and diseases often arise during pomegranate cultivation. Diseases cause relatively serious damage to pomegranates. So what diseases can pomegranates get? And how should they be controlled? Let's take a look together below!
1. Sooty mould
Symptoms: The targets of sooty mould damage are the leaves and fruit. In the early stage of leaf infection, an obvious layer of black unidentified substance appears on the leaf surface. However, this layer of unidentified substance can be easily wiped off by hand, and the leaf surface is also coated with a substance similar to soot, which prevents the leaves from carrying out photosynthesis. The main spread is caused by insects carrying the virus and stopping on the leaves, leaving excrement and so on, and trees with poor air permeability and high temperature and humidity have a higher incidence rate. Fruit infection is similar to that of the leaves.
Control methods: When pests are found on the trees, such as aphids, scale insects and so on, they should be removed promptly; manual capture or spraying insecticides and other chemicals can be used to drive them away. In severe cases, spray the affected areas with chemicals such as imibenconazole wettable powder for control, once every 9-11 days, for about one month.
2. Dry rot
Symptoms: Dry rot can occur throughout the entire growth period of the pomegranate, and it generally occurs more frequently around the Dragon Boat Festival. A high-humidity environment is the best condition for dry rot. After infection, it affects the flowers and fruit. In the early stage of flower infection, dark sunken lesions appear on the infected parts. In severe cases, it causes flower drop. After the fruit is infected, the affected part becomes soft and rotten, and later the moisture gradually loses and it dries out, with many small black spots appearing on the affected area. If not handled in time, it will cause rotting during harvest and storage.
Control methods: Strengthen orchard management, enhance tree resistance, do a good job of clearing the orchard before winter, and centrally dispose of diseased and disabled branches, fallen flowers and fallen fruit, and other things that pose disease risks. Observe carefully, remove diseased fruit promptly to prevent transmission, and try to avoid mechanical damage to the tree. Do a good job of bagging the fruit, and appropriately spray chemicals such as lime sulfur mixture for control.
3. Brown spot disease
Symptoms: The parts damaged by brown spot disease are the leaves and fruit, and brown spot disease causes a large amount of leaf drop and fruit drop in the trees. After the leaves are infected, many dark small spots appear on the surface, and these spots gradually expand and then form lesions of varying shapes. The center of the lesion has a slight sunken feeling. After the fruit is infected, it is similar to the leaves; some black spots appear on the lesions, and later the fruit rots and drops.
Control methods: First, as with dry rot, do a good job of clearing the orchard, take diseased and disabled branches, fallen leaves and fallen fruit out of the orchard in a centralized manner, and dispose of them far away. Reduce the sources of disease in the orchard, lower the incidence rate, strengthen orchard drainage and irrigation, prevent excessive humidity, and prevent a decline in the tree's disease resistance. After flowering, an appropriate amount of chemicals such as mancozeb can be sprayed. Then about once a week, for about one month.
The above are the common diseases of pomegranates. Of course, there are more than these; for example, there is also black spot disease and so on. I have only mentioned three relatively common ones. In fact, no matter what the disease is, it will have a relatively large impact on the growth of pomegranates. Actually, as long as you do a good job of routine orchard management and deal with some pests and diseases, fallen leaves and fallen fruit, and so on, you can effectively reduce the incidence rate. That is all for today's introduction. This article is for reference only. See you next time.