2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Pink moldy rot, called trichothecium in science, as well as bitter rot, usually affects pears and apples. As a rule, fruits become infected even during their formation and growth in gardens - a harmful fungus-pathogen penetrates into them through drying stamens with pistils. And its development continues during storage. The tissues affected by this ailment have a bitter taste, respectively, the fruits become much less attractive
A few words about the disease
On fruits affected by pink moldy rot, rotting specks of a brownish hue are formed. Most often they can be seen in the places where fruits are attached to the stalks or near the cups. These specks gradually grow and become covered with mycelium - initially white, and later pinkish bloom.
Sometimes the lesion with pink moldy rot begins in the middle of the seed chambers. In this case, the disease can only be detected by cutting the fruit. Usually in this way fruits with loose cups are affected.
If the storage regime is violated, pink mold rot can also affect the fruits sent for storage. This usually occurs at high temperatures or high humidity. If the fruits were harvested at the wrong time or have mechanical damage, then the risk of infection with these unpleasant ailments also increases markedly. A crop damaged by all kinds of pests can also be affected by pink mold rot.
It is worth noting that the fungus-causative agent of pink mold rot is extremely unstable to low temperatures - its ability to damage fruits sharply decreases when the temperature drops to four to eight degrees.
How to fight
Affected fruits should be collected periodically and must be destroyed. Dead leaves and twigs must also be removed from the garden in a timely manner.
The soil, along with garden trees, is sprayed with nitrafen or one percent Bordeaux mixture. You can also use oleocobrite and iron or copper sulfate. Spraying with these means must be carried out before flowering. Immediately after flowering, a second spraying will be appropriate, for which, in addition to the Bordeaux liquid, solutions of cuprozan, captan, zineba, phthalan or copper oxychloride are suitable. However, using both Bordeaux liquid and copper oxychloride, it is important to make sure in advance that these drugs will not provoke leaf burns. For this purpose, they first try to spray only the branches selected as control ones.
When collecting fruits intended for long-term storage, you should be as careful as possible. The storage facilities are disinfected by spraying them with formalin (10 liters of water will require 100 g of forty percent formalin) or fumigating with sulfur (30 g of sulfur is used for each square meter). After carrying out such processing, the room is closed for a day, and after this time it is well ventilated. Ceilings with walls are sprayed with Bordeaux liquid (for 10 liters of water - 100 g) or whitewashed with lime milk. And the container prepared for the fruit, along with the shelves in the storages, is scalded with boiling water, or, like the room itself, is treated with formalin.
The optimum temperature for storing fruits is considered to be about zero degrees, and the air humidity is in the range of 85 - 95%. The fruits removed from the trees should be cooled before storage. Sudden temperature fluctuations in storage facilities should be avoided. Also undesirable is the joint storage of pears with apples.
And to reduce the number of rotten fruits during storage, chemical methods of dealing with all kinds of pests (weevils, moths, caterpillars and others) will help throughout the entire growing season.
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