The scab of apple-tree is one of the most widespread diseases of fruit-trees in gardens. The disease leads to death of leaves, escapes, branches, considerably reduces quantity and quality of harvest. The fruits affected with scab badly are stored and have modest appearance.
Defeat by scab
The scab of fruit-trees represents colonies of microscopic mushrooms – konidiya, they breed disputes. The greatest defeat meets in years large amount of precipitation. During blossoming of garden of colony of mushrooms are found on kidneys, ovary, flowers. Most strongly the scab affects plants in thickened landings and also old trees. At strong spread of this disease it is possible to lose harvest completely.
Defeat of trees scab happens at young age and does the greatest harm. During this period on bark there are small swellings which then are broken off, allowing mushroom disputes to scatter freely. And the damaged branches dry up, also all tree can die. On fruits small spots of velvety raid of olive color appear, then they increase in sizes, fabrics of fruit or leaves under spots perishes. Strongly struck fruits are showered.
At strong defeat of garden scab it is necessary to spray trees right after blossoming with medicines "Is fast", Horus, Ditan.
As it is possible to struggle with scab of fruit-trees
It is impossible to neglect garden affairs. Steadily to receive big crops of apples, it is necessary to prevent disease therefore it is necessary to pay due attention to agrotechnology and use of chemical medicines for prevention of outbreak of scab.
Agrotechnology of cultivation of fruit
There are developed rules of landings of fruit plants. If it is strict to observe them, it is possible to reduce the probability of outbreak of scab in garden. For this purpose it is necessary to choose carefully the place for garden landings, to hold if necessary meliorative events (to take away excess water), before landing of fruit-trees to process the soil and to fertilize it. The most important in this list is the requirement to use for landing of plant variety, resistant to this disease and the healthy intact saplings. It is necessary to remove the fallen-down foliage and to dig up top soil and also to thin out kroner of adult plants for the best airing and illumination.
Grades of apple-tree, rather resistant to scab, are grades Johnathan, "Shafranny Pepin", "Antonovka", "Topaz" and others.
Use of chemical medicines
To receive good harvest of apples, it is necessary to think of it in advance. In the fall, after harvesting and before subsidence of leaves, process trees and the soil under them solution of urea (carbamide). Dosage – on 10 liters of water of 600 grams of urea. Repeat spraying the next year, at the beginning of June. In the conditions of the increased humidity during blooming of kidneys the fruit-trees can be sprayed with 3% solution of the Bordeaux liquid. The second time in phase of forming of flower buds is sprayed with 1% solution of oxychloride of copper or the medicines "Kuprosil", "Rubigan". Using combination of agrotechnical and chemical methods of fight against scab, it is possible to be sure that the harvest will be saved.