What Is Dry Rot Treatment?

Apple trunk rot is also known as rot rot. Mainly harmful to stems and fruits. The branches of planting seedlings, young trees, old and weak trees are seriously ill, often causing dead seedlings and even destroying the garden. Fruit rot was severely affected by Fuji series. In recent years, there has been a trend of worsening harm, which has become an important apple disease.

Apple trunk rot

Grafting of branches often occurs, and the bark appears dark brown or dark brown, and moist and irregular lesions can spread upward along one side of the trunk, with cracks on the edges, and rust-colored areas not appearing diseased. The skin is dark brown under section, and the disease color is lighter than that of rough skin. The diseased area can overflow with tea brown mucus, which has a moldy smell, and then loses water into dry spots. Dried branches are caused by the trunk of the diseased part. Small black grains are densely dense on the diseased skin. The fruit appears as light brown round spots at first, and then expands into concentric wheel-like spots staggered in depth, which quickly rots. The rotten part has a smell of acid rot, exuding brown mucus. After dehydration, a stiff fruit is formed, and black raised small grains are produced on the fruit surface.

Botryosphaeria berengeriana Tode Not, said

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B. Improve soil pH and increase root absorption capacity.

C. Scientific pruning. Pruning pruning can not only restore tree vigor and enhance disease resistance, but also improve crown structure, increase light energy utilization, increase flower bud formation, and lay the foundation for high yield. Sparse flowers and fruits, both production and trees (restoring tree vigor and avoiding weak parasites) are equally important.

D. Use fertilizer reasonably, control the size of the year, prevent early fallen leaves, and improve the overall nutrient level of the tree.

Apple trunk rot prevention program

A. The heavy cuts and saws when pruning fruit trees are smeared with original solution to prevent germ infection.

B. Remove the source of infection. Burn the diseased skin, diseased branches in time, and pick the fruits. Winter pruned branches should be removed from the orchard to prevent the growth of germs. Cut out the dry branches.

C. According to the idea of comprehensive prevention and control, do a good job of preventive medicine after harvest (usually about 20 days), germination period, and after flowering. Prior to germination is the period of key prevention, before spring flowering to young fruit period is the key period for pathogens to contact the host and breed, and it is also the key period for reducing and killing pathogens. Spraying with 600-800 times liquid has a very broad spectrum of prevention, and has no toxic and side effects. For the specific plan, see the comprehensive control history.

Apple trunk rot treatment plan

A. Scrape and cure

Important cures and smears: cure the lesions twice in early spring and late autumn. Use a knife to thoroughly scrape the diseased tissue of the tree in time to control the spread of the germs, and evenly spread the original solution + silicone agent into the diseased area, and then apply it again every 24 hours. For severe lesions, apply a third time between 7-10 days.