agronomist known to many diseases of potatoes.Late blight is probably one of the most dangerous of them.Its harmfulness increases significantly in temperate or humid climate.
This disease is prevalent in all the countries where the potato is grown in large quantities.An average of a yield losses may reach up to seventy percent.
potato late blight is a fungal disease caused by a pathogen.It affects the tubers, stems, flowers, roots.
first signs of the disease are seen on the leaves and stems of the upper tier.Late blight of potato has high damage as strikes young and physiologically the most active parts of the plant, reducing their productivity.
Decreasing assimilating surface on the leaves of root disrupted the process of formation and accumulation of many nutrients, especially in the phase of formation of tubers.
As a result on the leaves appear brown spots with a distinctive individual leaden hue.They significantly increase very quickly covering the entire hive, and then exchanging and neighb
In favorable conditions, potato blight spreads so rapidly that only seven or ten days can cover the entire area.
on the affected bushes early in the morning or in wet weather on the lower surface of the leaves appear whitish coating.This controversy engulfed the plant fungus.In dry weather struck the top of the withers for showering.After the rain it quickly rots, extending around the weak musty smell.
Stem blight of potato is characterized by the formation of the handle bars of dead tissue brown.Sometimes they cover the entire upper part of the plant.
on tubers as the disease appears sunken solid, well-rounded spots that are particularly visible on the cut fruit.The affected tissues penetrate the bacteria and other fungi, which further enhance root rot.
potato blight infects only the fruit, in the early stages of maturation.Initially, there is a barely noticeable white circular spot, which gradually spreads in brown subcutaneous education.Increasing in size, late blight gradually taking the whole potato, which softens and begins to rot.
This fungal disease destroys not only crops of potatoes, but being with him near the bushes of tomatoes.An interesting fact is that the eggplant and zucchini crops is absolutely not affected even at very close proximity to infected plants.
The fight against potato late blight generally is to use resistant varieties of seeds.In addition, important to limit the development of this fungal disease is the careful selection of material in preparation for landing.
In some countries, the seed potatoes during storage treated with fungicides.This is done to avoid the development of rot, including fitoftoroznoy.
Since the primary sources of infection are almost always diseased tubers, the experts advise to destroy landfill potato remaining after bulkhead obtained crop.