Caring for plants always requires certain knowledge. Even experienced specialists can make a mistake and not understand why the leaves of cucumbers fade in the greenhouse.
The fact is that cucumbers are quite whimsical vegetables that require special attention. The reasons for the death of the entire crop can be many:
- Lack of moisture in the soil.
- High or low air humidity.
- Violation of temperature, sudden changes in temperature.
- Excessive watering.
- Lack of light.
- Direct exposure to sunlight, burning the leaves of plants.
- Fungal diseases of the root system.
- Pests, spoiling shoots and leaves.
- The lack of minerals in the soil.
- Close proximity with other vegetables.
The first thing that comes to mind when the leaves of cucumbers in the greenhouse begin to dry and curl, the plants do not have enough moisture. This vegetable needs regular watering, especially if it grows in a greenhouse, where the temperature can be much higher than in open ground. Moisture is needed by the plant along with the light, for photosynthesis, through which food, division and growth of new cells take place.
If the root system is deficient in moisture, the leaves of the plant curl to reduce the area of evaporation and trap as much fluid as possible for development. This can occur with irregular watering. You can cope with the situation simply by watering cucumbers more often.
Increasing watering sometimes does not help fix the situation. Sluggish cucumber leaves may indicate an excess of moisture, which is retained at the roots in large quantities, causing rot. You can avoid such troubles by observing the cucumber irrigation regime in the greenhouse:
- In hot weather, plants are watered once a day, strictly early in the morning or in the evening, after sunset. Water consumption - no more than 9 liters per 1 square. m
- Water should be at room temperature. Cold liquid can damage the root system of a thermophilic vegetable and cause root rot.
- Water cucumbers need with a watering can, directing the pressure of water under the root. If moisture gets on the leaves, especially on a hot day, this can lead to the gradual death of the cucumber, since water droplets act like a magnifying glass in the sun. You can simply burn the leaves and shoots of vegetables.
If regular and proper watering does not help to find an answer to the question of why the leaves of cucumbers wither, you need to look for other reasons.
Excess or lack of fertilizer
Before planting cucumbers soil is treated with substances for the destruction of pests. As plants grow, such treatment can also be carried out using various fertilizers. Often gardeners use chemical fertilizers and fertilizers, which fall into the category of herbicides.
But a large number of such substances remaining on the leaves, can lead to the fact that they will begin to curl from the edges to the center, dry and fall.
Solve the problem is very simple. You just need to plentifully spray cucumber bushes with plenty of water. This will help wash off the herbicides from the visible parts of the vegetable and direct their excess into the soil. Apply feeding, especially foliar, you need to be careful, strictly following the instructions. Despite the fact that these substances help to accelerate the growth and fruiting of cucumbers in the greenhouse, their surplus is harmful to vegetables.
Twisted dry leaves may also indicate a lack of minerals: nitrogen, phosphorus, sulfur, and potassium.
The root system of vegetables is weak, it is located near the surface, so the plant can not always get enough nutrients from the soil. In this case, you can purchase dressing based on special industrial chemical compounds or fertilize cucumbers with manure, compost and chicken manure. These traditional vegetable care products have long proven their effectiveness.
There are a large number of pests that can appear in the greenhouse if the soil was not sufficiently well treated before planting. The most common reason for ruining a crop is various types of rot. Root rot can be identified by sluggish leaves and dark brown stalks of plants. If the rot has already hit the roots, then simply reducing watering will not be enough. It is necessary to treat the plant with special means.
Well fights with such a problem drug "Trichodermin."
There are other diseases that are harmful to plants. Most often, cucumbers in the greenhouse affect fungal diseases. The most common of them - white rot. It can be recognized by dry leaves, covered with white bloom. This disease can be prevented by treating the soil and seeds before planting. You can help infected plants with drugs such as Fitosporin, Gitrauxin, Kornevin.
The simplest precaution when growing cucumbers is regular spraying of vegetables with a weak solution of potassium permanganate.
Different types of rot - not the only problem that occurs in people who grow cucumbers in the greenhouse. The entire crop of vegetables can destroy the known pests: aphids and mites.
Funds for aphids and ticks
Aphids are very easy to recognize. These small insects feed on the leaves of many plants, cucumbers are no exception. The cells of the damaged leaf cannot participate in photosynthesis - the production of nutrients. The leaves turn yellow, dry and fall off, and the whole cucumber bush gradually dies.
A simple remedy for aphids, which does not require additional costs, can be quickly prepared at home. This is a common soap solution. If the treatment with soap and water is not enough, you can buy the drug "Spark", which copes with aphids without harm to cucumbers. You can fight ticks yourself too. The best remedy for these pests - onion peel infusion. It is prepared very simply:
- A handful of onion peel pour 1.5 liters of water and boil for 5 minutes.
- The solution is cooled and filtered.
- The resulting tincture is treated with shoots and leaves.
The right place for planting, careful watering, regular loosening of the soil, timely fertilization of cucumbers and pest control help to avoid diseases of vegetables and get a rich harvest in the greenhouse.