One of the most dangerous and common diseases of plums is sharqa. When it appears on the leaves, light green rings and spots are visible, and on the fruits, gum-detecting and dimples. In case of damage, the fruits fall to the ground ahead of the harvest time in two to three weeks. Plums, diseases and pests, which are often transmitted by aphids, in this case can also be affected by cicadas. Also, the cause of the disease may be the vaccination or planting of already diseased trees. You can fight the scab only by digging up a sick plum, you should also carefully examine it during a transplant, as an option, you can get rid of the carriers of the disease in the usual ways, for example, by spraying with special drugs.
Plum, diseases and pests on which often appear when young leaves appear, can be infected with a fungus that causes leaf burns. He hibernates in fallen foliage, and in the spring he moves to young. The disease manifests itself after 30-45 days in the form of light yellow spots, which eventually acquire a red tint. In this case, swelling appears on the lower part of the leaves. If the disease progresses very strongly, then foliage may fall.
A disease called "pockets" causes severe harm to the fruit, the ovary falls off. It also negatively affects shoots and leaves. The cause of this disease is also a fungus. He hibernates between the scales of the kidneys. How to handle plum from pests in this case? Bordeaux liquid 1% is great. Before treating the tree, it is necessary to collect the affected leaves and burn, only then spray it.
Plum, diseases and pests on which a variety of appear, sometimes affected by viruses. Among them are narrow-linear and deforming variegation, any other kind of it can form. Also, the occurrence of fruit rot, goiter of the roots (bacterial cancer), apoplexy, verticillium wilt, chlorosis, and bacteriosis are sometimes observed. In the event of prolonged atmospheric drought, the fruit may fall. Before this, they acquire a blue color, near the peduncle, the skin becomes wrinkled.
Not only the ailments listed above can be plummeted. Diseases and pests that interfere with the normal growth and development of the tree are not only viruses and fungi. Quite often, the plum is exposed to aphids (small plum, thistle, hop, etc.), scutes (mulberry, red and yellow oyster-like, acacia false scab), ticks (plum gall, apple red, ordinary spider, etc.). You can get rid of these pests on a tree in the same way as on other plants.
The most common plum diseases and pests (some photos are given in the article) include a parasite such as plum gall fly. Its larvae winter in the ground. In the spring of them insects appear that lay eggs near the central vein. They feed on the top of the leaves. Their larvae leave in June, burying themselves again in the ground at the same time.
Plum weevil also causes serious damage to the tree. This bronze beetle with a red-copper sheen hibernates in the soil. In the spring he eats a young ovary, while the infected fruits fall. The whole scavenger must be collected and destroyed (for example, burned).
A parasite such as a plum sawfly, which hibernates in the soil as a caterpillar, is also widely known. Adult insects appear before plum blossoms, females lay eggs in calyxes of flowers, and subsequently larvae bite into the ovary, eating away the seed.
To control pests, the old bark is removed and the plant is sprayed several times (usually 4-5). You also need to collect and destroy the scavenger. You can use such a control measure as winter spraying of plants with pesticides.