Great damage to cucumber plants, especially those grown in closed ground, causes diseases.
Their appearance is caused by improper care of plants and temperature differences.
This powdery mildew. Great damage to the cucumber plant. Initially, on the upper surface of the leaves, and then on the lower appear individual spots, covered with a white mealy coating, then increase and quickly wither. The development of the disease contributes to a lack of moisture.
When the first signs of plant disease appearIt is necessary to spray with a preparation of colloidal sulfur. It is possible to apply a solution of Mullein: 1/4 bucket filled with mullein and pour water, mix, strain and dilute again twice.
Bacteriosis. It affects the shoots, leaves, flowers and fruits of cucumbers. On the leaves appear angular oily brown spots, which later become grayish-white and wither. On the fruits appear rounded watery spots. The fruits acquire a distorted form and a bitter taste. Before planting plants, biopreparations such as trichodermine must be introduced into the soil.
Cucumber mosaic. Viral disease, on young leavesAppear yellowish-green spots, short internodes are formed, the plants are depressed, turn yellow and dry up. For the control it is necessary to sow the seeds of a 2-3-year shelf life. Disinfection of the working tool with 5% manganese solution.
Root rot. Before or during fruiting, the leaves of the cucumber fade, part of the stem at the roots turns yellow, cracks appear. The disease occurs when growing cucumbers after pumpkin crops, when watering with cold water.
When signs of the disease appear,Stems to the roots to scrape the ground and treat the affected part of the stem with a solution: 1 teaspoon of copper sulfate, 3 tablespoons chalk or wood ash per 0.5 liters of water. And when planting seedlings should not bury the stems of the plant, do not hill.
Gray rot. Appearance on stalks of mulching gray spots. The disease occurs when the temperature is lowered, watering with cold water, poor ventilation, thick planting. In this case, you should stop watering for 4-5 days, ventilate the greenhouse. Seedlings treated with a solution: 1 teaspoon of copper sulfate and 1 cup of wood ash, sprinkle with solution the affected areas of plants.