Canker is a threat to walnut trees

Canker is a threat to walnut trees

A phytosanitary researcher called canker the most important recent threat to walnut trees.

Munir Asadzadeh stated: Walnut is one of the most important dried fruit products in the world.

He said that in some industrial countries as an oil tree has a special role, he added: Persian walnut is the most important species of the genus Joglanse, which is considered in terms of fruit and wood.

Asadzadeh said: In recent years, cancer is a serious threat to walnut trees.

This expert of the Plant Research Department of Lorestan Agricultural Research and Training Center and Natural Resources said: This disease is one of the most important factors in reducing production and dark brown color is clearly visible on the skin of the trunk and main branch.

He cited the formation of spherical blisters on the outermost layer of the skin as another symptom, adding: The cancers become wider in summer and progress faster in wet or rainy weather.

Asadzadeh, pointing out that the growth of cancers stops in autumn and winter, continued: timely fertilization and irrigation prevents the formation and spread of cancers, and to strengthen the tree, phosphate and potassium fertilizers should be used in March, nitrogen during April and livestock manure in winter. Be.

Proper harvesting of fruit is one way to control the disease because deep skin wounds are the most important way for bacteria to penetrate, said the phytosanitary researcher.

He also mentioned the pruning of infected branches as one of the ways to deal with this disease and said: Until now, there has been no poison or antibiotic to control this disease, but in the beginning, infected infected parts can be disinfected with copper toxins or sodium hypochlorite.