Latest Common Pomegranate Diseases and Their Control

Pomegranate cultivation is mostly concentrated in the tropical and temperate regions of our country, but with the current development of cultivation technology, greenhouse techniques now make it possible to grow them in other regions as well. Although the growing environment has been mostly sorted out, many problems and diseases frequently arise during pomegranate cultivation. Diseases cause relatively serious damage to pomegranates. So what diseases can pomegranates get? How should they be controlled? Let's take a look together below!

1. Sooty mold

Symptoms: The damage from sooty mold targets leaves and fruit. In the early stages of leaf infection, an obvious layer of black unidentified matter appears on the leaf surface. However, this layer of unidentified matter can be easily wiped off by hand, and the leaf surface is also coated with a substance resembling soot, preventing the leaves from carrying out photosynthesis. The main spread is due to insects carrying the virus, landing on the leaves and leaving excrement behind, and fruit trees with poor ventilation and high temperature and humidity have a higher incidence rate. Fruit symptoms are similar to those on leaves.

Control methods: When pests such as aphids and scale insects are found on the fruit trees, they should be removed promptly, either by manual capture or by spraying insecticides and similar agents to drive them away. In severe cases, spray the affected areas with agents 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 generally occurs more frequently around the Dragon Boat Festival. A high-humidity environment is the optimal condition for dry rot. After onset, it affects flowers and fruit. In the early stages of flower infection, dark sunken lesions appear on the affected parts. In severe cases, it causes flower drop. After fruit infection, the affected parts become soft and rotting, and later the moisture gradually drains and they dry out, with many small black dots appearing on the affected areas. If not handled promptly, it will lead to rot during harvest and storage.

Control methods: Strengthen orchard management to enhance tree resistance. Before winter, do a good job of clearing the orchard, and centrally dispose of diseased and dead branches, fallen flowers and fruit, and other things that pose disease risks. Observe carefully, promptly remove diseased fruit to prevent spread, and try to avoid mechanical injury to the trees. Do a good job of bagging the fruit, and appropriately spray agents such as lime sulfur mixture for control.

3. Brown spot

Symptoms: Brown spot damages leaves and fruit, and can cause a large amount of leaf and fruit drop in the fruit trees. After leaf infection, 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 feel. Fruit symptoms are similar to those on leaves, with some black dots appearing 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, and take diseased and dead branches, fallen leaves and fruit out of the orchard in a centralized manner and dispose of them far away. Reduce the sources of disease in the orchard to lower the incidence rate, and strengthen drainage and irrigation in the orchard to prevent excessive humidity, which reduces the trees' disease resistance. After flowering, an appropriate amount of agents 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 just these, such as black spot disease. I have only mentioned three of the more 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 fruit, and so on, you can effectively reduce the incidence rate. That's all for today's introduction. This article is for reference only. See you next time.