Late blight of tomatoes

Signs of late blight of tomatoesWith the development of such a disease, as late blight of tomatoes, it is harmful to both leaves, stems and fruits. In some cases, this results in the fact that the tomatoes for 1-2 days acquire a black color, after which they soften and rot. Leave such tomatoes for storage and canning is not recommended. Favorable conditions for the development of late blight arise with significant diurnal temperature changes, fall of autumn cold dew, as well as thickened plantings.

To prevent the defeat of tomatoes by late blight, it is necessary, first of all, to maintain a crop rotation. Cultivate the cultures of one family in the old place can only after at least 3 years. It is not recommended to cultivate tomatoes using structures taken from protected soil for several years in a row. The remains of plants that have affected the fluorescence must be destroyed by burning.

Prevention of late blight on tomatoes

Seeing that the plants show characteristic signs of phytophthora, one must bear in mind that there are not many chances to cope with it and save the harvest. To avoid this, naturally, it is necessary to carry out preventive measures. With the end of flowering, tomato spraying should be carried out using an acrobat (40 g per 10 L of water) or methaxyl (80 g per 10 L of water). As the plants grow, it will be possible to restrict spraying using any fungicide (based on 10 L of water): Pincakeba or traidex - 16 g, medex - 100 ml, Ridomila - 25 g. Minimum application rate for 10 m2 Should be 0,5 l. Engage in chemical processing is desirable in the evening and windless weather.

Fighting tomato late blight

If the rainy summer has turned out, tomatoes are recommended to spray 4-5 once a season, observing the periodicity between treatments in 7-10 days. The last time plants are processed for 20 days before harvest.

Positive on the growth of plants and yield affects the use of growth regulators. The main effect is to increase immunity and resistance to disease. For this purpose, you can use oxyhumate (10 ml per 1 L of water), Exionol (1 ml per 3 L of water).

In case if the listed means are absent, for struggle against blackening of tomatoes it is possible to resort to the traditional means used by not one generation of gardeners - the Bordeaux liquid. Plants treat it every week.

Good results in the fight against phytophthora of tomatoes can be achieved if you cook garlic infusion. During the season, you can spend up to 5 treatments, observing the frequency between each 15-18 days. For the preparation of 10 l water, 1,5 carefully chopped garlic, 2 g of potassium permanganate and a couple of spoons of usual household crushed soap should be added. After stirring the mixture, it is filtered, then the plants are sprayed. The optimum rate of consumption is inflicted - 100-150 g for 1 sq. M. M.

Watch the weather. Starting to notice that at night the temperature began to stay near + 10 ° C, keep in mind that such conditions for tomato fruit are unfavorable. In this regard, you should collect them early, even if they have not yet reached maturity: at least, you will have more chances to prevent the defeat of their phytophthora. Avoid the same blackening removed, having a seemingly healthy appearance of tomatoes can be, if at the end of cleaning, immerse them in hot water (no higher than 60 degrees) for 1,5-2 minutes. Do not worry about their wrinkled ugly appearance: so the fruits can ripen well and taste will not differ from the usual.

For decades, the spores of late blight, as well as other fungal diseases, do not perish. Being in the soil, they will wait for favorable conditions to again hit the plants. In this regard, having collected the whole harvest in autumn, the tomato tops should be burned (it should not be used for composting) and deep digging of the garden bed. It is not recommended for many years to take the same place for tomatoes.

Established in practice fact - when growing tomatoes tall plants show a higher resistance to diseases of phytophthora than undersized plants. There are fewer cases of the disease development among tomato bushes, which are grown in greenhouses and greenhouses, where there are no significant diurnal temperature changes.



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