If the tops of potatoes dry, you need to understand the causes of its decay to conduct preventive measures possible. Otherwise, potato tubers do not have time to ripen.
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fungal diseases
Most often affected phytophthora potatoes, especially fast it spread on the plots where the bushes are planted too often. First on the leaf appear dark spots and dark greens completely and dries in a few days. Tubers and tops affected phytophthora, it is recommended to burn. They are not suitable either for planting or for human consumption.
It is not often affected by other potato diseases caused by pathogenic fungi:
- Fusarium;
- Verticillium Wilt;
- macrosporiosis;
- alternaria.
If any part of the pathology of vegetative potato dies prematurely, but the tubers are not mature.
bacterial diseases
Among the diseases caused by bacteria, most commonly found blackleg and ring rot.
When blackleg first affects the roots and root collar, and then the infection spreads to the upper part of the autonomic, killing young shoots, and then the whole plant.
Ring rot is seen by the end of the growing season, when the time to form tubers. At external examination, they look flawless, but the cross-cut closer to the skin of the black ring markedly damaged by fungus flesh.
viral diseases
Because viral diseases tubers not ripen, become ugly form, and turnip yellow and early fade.
For viral diseases include:
- epidemic alfalfa mosaic (calico);
- leaf curl;
- mottling;
- spindle-shaped and so on.
attack by pests
The most common potato pest is the Colorado potato beetle. His voracious larvae so that in the period of the emergence of 2-3 days may completely destroy the plantation, leaving the stems without leaves, which soon wither.
Potato tubers affected wireworm, they become unsuitable for human consumption, as the larva of the pest penetrates them, eating in them moves.
To a lesser extent the culture is exposed to the invasion of potato flea beetles, leafhoppers, some types of nematodes.
Weather disasters
Adverse weather conditions associated with drought or late frost can cause wilting and drying of foliage. The most optimum temperature for development of tubers of +15... + 25 ° C. Deviation from the norm not only slows down the tubers, but also the growth of the vegetative part of the ground.
Advice
The store offers a range of tools to address the problems of potato. But every gardener needs to know what steps you can take to the disease is not spread:
- necessary to comply with crop rotation and plant potatoes in the same place is not more than 1 time in 4-5 years;
- carefully carry out sanitary cleaning of the plantation after harvest, burning tops and diseased tubers;
- farm before planting Bordeaux mixture or other disinfectant;
- carefully inspect planting material for diseased and discard poor quality tubers.
To prevent the spread of infection potatoes dusted with ash, and aisle sprinkled with charcoal.
Good help fight disease and pest spraying with tincture of garlic. In a bucket of warm water during the day insist 5-6 garlic cloves, crushed to a pulp. The treatment is carried out during the intervals of 2 weeks of the growing season.
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Read more: 9 Tips for growing potatoes