Cucumber is a favorite culture, without which it is difficult to imagine vegetable gardens. Salted, pickled and just fresh cucumbers are an indispensable component of a variety of salads and other wonderful dishes. However, the cultivation of this capricious culture requires constant care and "vigilant" control - often the leaves of the cucumber turn yellow, dry or become stained. This can be the result of incorrect or irregular care, as well as the manifestation of various diseases. In any case, the appearance is affected, the "well-being" of the plant worsens, and there is no need to talk about good harvests. So before planting cucumbers to beginners, it will be useful to pay attention to the study of this topic.
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Why do cucumbers in the greenhouse turn yellow leaves: the main reasons What to do so that the leaves do not yell in cucumbers: useful advice to truck farmers What if the cucumbers start to turn yellow leaves?Why do cucumbers in the greenhouse turn yellow leaves: the main reasons
The yellowing of the leaves for cucumbers occurs for many reasons, which are not easy to understand, especially for the beginner in the "garden" business. After all, the symptoms can manifest themselves in different ways - the leaf turns yellow at the edges, the lower leaves blotch or the fruit itself turns yellow and dries. Before dealing with the yellowing of the leaves in cucumbers, you should find out the cause of this phenomenon.
The reasons why yellow: Lack of moisture and violation of the regime of watering cucumbers
It is known that moisture-loving cucumbers require abundant watering, especially in dry weather. If the plant receives insufficient water, its leaves may turn yellow. In addition, you should observe the irrigation regime - 3 - 4 times a week and in reasonable amounts. At the same time, water should not fall on the leaves, because on hot sunny days, droplets of moisture become "lenses" and the plant can get burned.
Unsuccessfully chosen seat for planting
If you are going to plant cucumbers, then it is better to choose a light, but slightly shaded area. After all, the wild "ancestors" of modern varieties of cucumbers were herbaceous stems-lianas, which with the help of antennae clung to the branches of large trees. Therefore, do not make a mistake and plant the plant in the sun itself - in such conditions, the leaves of cucumbers turn yellow and dry.
Deficiency of nutrients
To such vital substances is nitrogen, which is a building material for plant leaves. If there is a lack of nitrogen in the soil, the cucumber leaves start to turn yellow and fall off. So, during the preparation of the planting beds, nitrogen fertilizers must be introduced to plant the crop. In addition, it does not hurt to make additional fertilizing during the cultivation. How to feed cucumbers, if the leaves turn yellow? Humus or overgrown manure contains nitrogen and other useful trace elements.
Why yellowed leaves in cucumbers: Pests and diseases
Yellowing of cucumber leaves is often caused by various diseases and pests, the fight with which should be started as early as possible - otherwise the infection will spread quickly throughout the garden.
What diseases cucumber yellow leaves?
These are fungal diseases:
- Fusarium fungus - affects the roots and causes their death. In turn, the plant receives insufficient nutrients, which provokes yellowing of the leaves. The disease can occur with sudden changes in temperature. In order to avoid infection of healthy plants, the affected parts should be pulled from the ground.
- Bacteriosis - occurs as a result of high humidity of air and soil. The development of bacteriosis is possible as a result of excessive entrainment by irrigation.
- Root rot - with this disease the leaves begin to turn yellow from below, and then the disease passes to the whole plant. The cause of root rot can be a sharp temperature drop in the greenhouse or watering with cold running water.
The most common pests include melon aphid, which is usually "activated" in conditions of high humidity. The infected leaves of cucumbers turn yellow and dry, and the inflorescence disappears.
What to do, so that the cucumbers do not yell the leaves: useful tips for gardeners
Of course, any disease is better to prevent than treat. So to prevent diseases, you can carry out preventive measures.
Yellow leaves from cucumbers - how to fight: We observe a crop rotation
It is not recommended to plant cucumbers in the same place for several years. If before the cucumber planted pumpkin or zucchini, the risk of fungal disease increases.
How to water cucumbers so that they do not yellow?
The beds can be covered with a layer of weeds or mown grass. This will hold moisture in the soil, and the roots of cucumbers will be provided with heat and nutrition.
In detail, how to properly water cucumbers, read here
How to feed cucumbers, if the leaves turn yellow?
It is necessary for additional nutrition of the plant. How to feed cucumbers, if the leaves turn yellow? To this end, we use organic or mineral fertilizers, in particular, infusion of grass. This top dressing is most effective in conjunction with ash, which must be poured into the holes.
Yellow leaves in cucumbers - how to fight: Spray a special solution
Than to process cucumbers if the leaf turns yellow? As soon as seedlings appeared (phase 3 - 4 leaves), it is necessary to spray the cucumber with a preventive mixture. Prescription means: loaf of bread in the evening should be soaked in a bucket of water, and in the morning stretch and add a bubble of iodine. Take 1 liter of this mixture and dilute in a bucket of water. If the leaves turn yellow at the cucumber, we treat this plant with an interval once a week. So, until the fall, cucumbers will retain their green color and appetizing appearance.
Another way to prevent pests is the onion peel. Fill a can of onion husks (700 grams) with water (10 liters), then bring to a boil. Close the lid and press for 12 to 14 hours. Squeeze the husks, filter the broth and dilute with water - in a proportion of 2: 8. With the resulting solution we water the ground, and also spray the leaves of cucumbers from above and below.
What if the cucumber starts to turn yellow?
If the first signs of the disease are found, the next solution should be prepared. Take the milk whey or kefir (2 liters) and dissolve in 10 liters of water. If desired, you can add sugar (150 grams) - this contributes to better tying fruit.
How to rejuvenate the aging cucumber leaves? As a foliar top dressing, urea can be used, and humus can be applied to the roots of the plant. To this end, we use the infusion of pre-sen hay, which is pre-soaked in water (1: 1) for two days. Ready-made infusion should be sprinkled with cucumbers once a week, for three weeks.
The most effective ways to deal with the Colorado beetle here
So, we figured out why the leaves turn yellow in cucumbers and how to fight it. Apply a little effort and your plants will be healthy, and the harvest of cucumbers - generous, tasty and crunchy.