Illustrative specification sheykovoy and root rot of walnut

Illustrative specification (picture gallery at end of article)

And Sakova root rot is a major disease of walnut in Chile, the causative organisms are sets of fungal species belonging to the genus Phytophthora.

Symptoms

The most characteristic symptom occurs at the level of the trunk, below the ground surface where visible cancers, consisting of decayed tissues an intense brown color, moist texture, in turn, negatively affect the cervix and the crown. Diseased trees stop growing due to lesions, the foliage becomes paler and is a focal disease.

Predisposing conditions

The formation of rot on the neck conducive to a surplus of moisture at the base of the trunk. Being sustainable soil inhabitant, it can persist for long time even in the absence of host plants. Soil dispersion occurs in the fall, when the soil is still wet, and is cold weather, soil dispersion occurs through irrigation water or soil, and is transmitted via pruning tools, and also through the commercialization of infected seedlings.

Precautions

The factors contributing to the development of the disease, which should be avoided.

Avoid contact with irrigation water directly to the base of the trunk or crown of trees.

To split the garden ground, where the groundwater level is not high. Avoid areas where there is accumulation of surface water.

Planting on ridges or elevated platforms, to improve drainage.

The Scion must not come into contact with the ground.

You should avoid planting in clay soils.

It is necessary to manage the irrigation system properly.

It is necessary that soil moisture was not excessive.

It is necessary to avoid bogging.

It is necessary to control weeds around the trunk, since they maintain moisture.

It is necessary to avoid damage to the trunk and neck.

Chemical control:

You must remember that the success of the application depends on the time of the product You are using and the quality of the apps (adjustable and calibrated equipment).

Other measures

It is necessary to use sustainable designs. It was shown that the samples are propagated vegetatively, i.e. cloned, are more susceptible to this disease.

You need to find the affected trees and remove them from the garden.

You should avoid direct.

When monitoring emerging symptoms of the disease in the tree (slow growth and yellowing of leaves), it is recommended to remove the cervix and the roots, so damaged tissue is dry.

Gallery

A clear distinction of healthy and diseased tissues.