2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
We continue to talk about plum diseases
Getting Started - Part 1.
A disease such as clasterosporium is very often called perforated leaf spot. The disease has a devastating effect on flowers, fruits, young shoots, leaves, buds. The disease should be classified as a fungal disease. Over time, diseased leaves become full of holes, they will dry out and, ultimately, completely fall off.
With regard to preventive measures and methods of combating such a disease, it is necessary, first of all, to promptly remove infected branches and shoots. In the autumn, fallen leaves must be removed. Before the buds bloom, treatment with ferrous sulfate should be carried out at the rate of ten liters of water per three hundred grams of ferrous sulfate. As soon as the buds begin to open, you can process it with Bordeaux liquid: at the rate of ten liters of water per hundred grams.
Another disease from the category of fungal is called pockets of plums. The disease will affect the plum tree itself.
Fungus infection occurs even during flowering, due to the disease, the fruits will significantly change their shape. Diseased fruits are shaped like pods or pockets that do not form seeds. Due to the presence of spores of the fungus, the surface of the fruits will become a dirty gray color by the end of July, after which the fruits will turn brown and eventually fall off. Naturally, such infected fruits can no longer be eaten. Such a mushroom can spend the winter period of time either in cracks in the bark or under the scales of the buds. Favorable conditions for the development of this disease will be high air humidity and moderate temperature conditions: such conditions should be during the flowering of the plum tree. It should be noted that those varieties in which flowering occurs quite late are particularly susceptible to this disease. Sometimes the disease can affect up to a quarter of all the fruits of one tree.
The main preventive measure will be the timely collection and destruction of diseased fruits. This must be done even before the sporulation of the fungus begins. This method will allow you to localize the disease. When the buds begin to bloom in early spring, spraying should be done with copper oxychloride: at the rate of ten liters of water per forty grams, or with the help of Bordeaux liquid: at the rate of ten liters of water per three hundred grams. Such spraying should be done only if the tree was affected by the disease in droves last season.
Witch's broom - this disease also belongs to the category of fungal. The disease itself owes its name to the fact that a large number of very thin branches are formed, which are located in close proximity to each other. Such twigs will be very similar to a broom. Leaves will appear on these shoots much earlier than healthy ones, but they will be very small in size, their edges are wavy, they are pale in color, and the shade will be yellowish-red. Already in the middle of summer, the underside of the leaves will be covered with a grayish waxy bloom, which is the spore of the fungus. When ripe, the spores of the fungus will disperse, falling at the same time on different parts of the plum trees. The mushroom spends winter in the branches or under the scales of the buds. In the spring, spores will wake up and begin to infect growth buds, which are just beginning to awaken.
In the spring, all diseased branches should be carefully selected and destroyed. And in early spring, plum trees should be sprayed with copper sulfate: ten liters of water per hundred grams.
As it is easy to see, in order to combat many diseases, careful monitoring of the tree itself is necessary so that at the first signs of the disease, appropriate measures can be taken. Therefore, gardeners should be sure to carefully study their trees and should do this on a regular basis.
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