Big harm to the cucumber plants which are especially grown up in the closed soil is caused by diseases. Their emergence is caused by the wrong care for plants and temperature drop.
Real mealy dew. Does big harm to cucumber plant. Initially on upper surface of leaves, and then on lower there are separate spots covered with white mealy raid then increase and quickly dry up. The lack of moisture contributes to the development of disease.
At emergence of the first symptoms of disease of plant it is necessary to spray with medicine of colloid sulfur. It is possible to apply mullein solution: To fill 1/4 buckets with mullein and to fill in with water, to mix, filter and dilute once again twice.
Bacteriosis. Strikes shoots, leaves, flowers and fruits of cucumbers. On leaves there are angular oily growing brown spots which become further grayish-white and dry up. On fruits roundish watery spots appear. Fruits develop the distorted form and bitter taste. Before planting of plants it is necessary to bring in soil biological products, such as trikhodermin.
Cucumber mosaic. Viral disease, on young leaves there are yellowish-green spots, short interstices are formed, plants are oppressed, turn yellow and dry up. For fight it is necessary to sow seeds of 2-3-year storage life. Disinfection of the working tool 5% manganese solution.
Root decayed. To or during fructification the leaves of cucumber fade, part of stalk at roots turns yellow, cracks appear. The disease arises at cultivation of cucumbers after pumpkin cultures, when watering by cold water.
At emergence of symptoms of disease it is necessary from stalk to the backs to remove the earth and to process the struck part of stalk solution: 1 h l of copper vitriol, swept 3 tablespoons or wood ashes on 0.5 l of water. And when planting seedling it is not necessary to bury plant stalks, not to hill.
Gray decay. Emergence on stalks osliznyayushchikhsya gray spots. The disease arises at fall of temperature, having watered with cold water, bad ventilation, dense landing. In this case it is necessary to stop waterings for 4-5 days, to air the greenhouse. To process seedling solution: 1 h l of copper vitriol and 1 glass of wood ashes to strew with solution the struck places of plants.