Yellow leaves of cucumbers in the greenhouse - what to do?

Ogorodniki, growing cucumbers in greenhouses, periodically encounter the fact that the leaves of plants turn yellow. The reasons for this phenomenon are different: from the violation of growing conditions to cucumber diseases. Let's think about what to do if the leaves of the cucumber in the greenhouse turn yellow.

Violation of the cultivation of cucumber

Everyone knows that cucumbers are very fond of moisture and warmth. However, in the spring, recurrent colds occur, when the temperature in the greenhouse can drop below the permissible + 14 ° C. In this case, cucumber seedlings can turn yellow and growth will stop, and at temperatures below 0 ° C - and completely die.

To help cucumbers survive such spring colds, it is necessary to make additional plantings over the plantations with the help of special covering materials or conventional film.

Another reason that the leaves of cucumbers in the greenhouse turn yellow, there may be a lack of soil in the soil of minerals, in particular nitrogen. In this case, the leaves first turn yellow, and then the whips, and the fruits themselves become hook-shaped. To prevent this, it follows the seedlings, before planting it in the greenhouse, fertilize the fertilizer with the necessary trace elements.

Yellowing of cucumbers is caused by insufficient watering. If cold water is used to moisten the soil under cucumbers, then plants do not like it, and they will turn yellow. Therefore, it is necessary to regularly water the cucumbers in the greenhouse with warm water and preferably with standing water.

Cucumber diseases, in which leaves turn yellow

Often, cucumbers are affected by a fungal disease, such as fusariosis. In this case, at the time of the appearance of the ovaries, the leaves first turn yellow, and later the plants themselves wither. Powdery mildew is also a fungal disease, in which the leaves of cucumbers turn yellow spots. In order that these diseases do not affect the greenhouse planting of cucumbers, it is necessary to treat the soil before planting potassium permanganate, or use sideration, and in addition, to choose varieties of cucumbers that are resistant to these diseases.

Cucumbers can be affected throughout the season by aphids and spider mite. It is recommended to fight them with such drugs as Akarin, Tsymbush, Fitoverm and others.