Tonsil rust

Goiter diseases

by admin
January 29, 2024

Goiter lesions

Disease name: Tonsil rust

The scientific name: Tranzachelia discolor

Disease family: This disease affects peaches, apricots, peaches and almonds

Symptoms of the disease: Infected leaves usually appear with reddish to dark brown pustules on the lower surface (as shown in the picture). At the beginning of the disease, small yellow spots form on the upper surface. Their color gradually changes to a bright yellow color, and urinary pustules appear on them later. Finally, the telic spores form and are colored. Blackish brown, the severity of the infection leads to the fall of the leaves and the weakening of the plant. The damage may not reach the fruits because they have already been harvested, and the damage is limited to the general weakness of the tree in terms of the leaves falling early.

The causes of disease: It is caused by the fungus Tranzachelia discolor

Conditions suitable for the spread of the disease: The development of the disease requires warm, humid weather. The severity of the disease increases on trees planted in poorly drained lands.

Disease development cycle: The type of fungus is a long-cycling basidiomycete fungus. The uretic phase and the teletic phase are on trees with stone cores, while the weeping phase and the acidic phase are on anemone plants. The disease is found in the remains of infected and fallen plants at the end of the season in the form of teletic spores, which are a source of primary infection.

Losses of disease spreadLeaves begin to fall early, which leads to the fruits being exposed to the sun’s rays. This causes severe damage to the fruits. Damage from this disease occurs most frequently in the moderately hot and humid summer.

Control strategy: It is very important to continue spraying even after harvest in order to protect the leaves.

Preventive measures to prevent the occurrence of the disease: Use low-allergenic or rust-resistant varieties.
Destroying and burying cereal plants that have germinated after harvest helps reduce the causative agent of the initial disease. Treatment of the pest depends on a preventive treatment with a fungicide. In dry areas, the infection is minimal, so the trees must be monitored. If the pest appears, we fight it. However, in wet areas, it must be Treatment is preventive.

Organic and chemical control recommendations:

Collect infected leaves and burn them away from the field.
Getting rid of anemone plants near almond trees.
Spray the trees when symptoms appear with Bordeaux mixture or copper sulphate, and repeat the spraying twice, with 3 weeks separating the first and second spraying.