What if there was a blight on potatoes?

Potato late blight - the main fungal disease that affects all parts of the plant, including tubers. This article will describe how to manifest late blight on potatoes, will talk about protection and prevention measures, which drugs should be used.

Infection occurs, usually in the second half of the growing season. Phytophthora promotes development rainy weather, cool nights and heavy dew. Risk of late blight is the rapid reproduction. With the help of the wind and rain droplets spores are transported from leaves to other bushes exponentially. It is noted, first of all, of mass destruction: from single dark spots to full coverage of plant infection in just a few days. The harvest may be reduced to 80 percent.

Prevention and protection against Phytophthora

1.Chemicals.

As a precaution, the potatoes are sprayed in a season 3 times with fungicides. The first spraying is carried out in the second half of July. At this time the tops already closed in between the rows, and the humidity increased.

At the moment, the unit may appear brown spots - signs of Phytophthora. So do not delay you need and quickly sprayed once as a preventive bushes one percent of copper sulfate, a fungicide of contact action. The procedure is carried out before flowering.

If the disease manifests itself aggressively, the treatment is carried out 2-3 times. 2 weeks before harvest spraying must be stopped.

Phytophthora often seen on sites that contain little copper. The first hilling as prophylaxis can spray a one percent solution Bordeaux mixture, which holds the development of Phytophthora. The second treatment Bordeaux liquid is carried out at the first sign of late blight. The third spraying is carried out one week after the second. 2 weeks before the potato tops removed to Phytophthora has not penetrated into the tubers. Also, the stems are cut to form tubers in a thick rind.

Many gardeners selected early potato varieties (Meteor, Timo, Capri, for example). Tubers have time to mature before the late blight epidemic. And also recommend choosing resistant varieties to late blight (Onezhskii, Bolvinsky, Master, Papa, Lugovskoy, Meteor, Elizabeth, etc.).

2.Biologics.

Biologics based on living organisms are struggling with late blight with repeated use and compliance with the requirements of farming.

Common biologics: Alirin, fitosporin, Trichoderma. They are safe for the environment.

Spud 3 times per season, and the last high hilling does not link up tops in a row that prevents infection, because Phytophthora develops with dense plantation. The water will drain away from the center of the bush into the groove. Recommended aisle at least 70 cm. This will help to avoid the danger of Phytophthora in the rainy days.

During flowering can not be fed potatoes with organic fertilizers. It can also cause the disease. After harvesting the tops must be removed and burned as possible in the compost heap of potato crop residues do not contribute.

Before laying on storage of potato tubers treated with biologic fitosporin-M.

Thus, it is better to prevent disease than to treat it.

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