Why the leaves turn yellow pumpkin. What to do?

Why the leaves turn yellow pumpkin. What to do? Gardeners start looking for an answer to this question when their pet is already affected by some disease. After all, most often it is the disease - the cause of yellowing of the leaves. But there are other factors. But first things first.

Cold

Sometimes people plant pumpkin seedlings in the open ground too early. The temperature of the soil and ambient air does not allow the plant to develop normally and the root system to work at full strength. From here there is a sharp shortage of nutrients, the leaves turn yellow.

Interestingly, feeding pumpkins during this period will not give anything. The roots don't work! What to do? Of course to warm. First you need to put an arc over the plant and cover with a thick plastic wrap. Inside, next to the stem, it is necessary to put a plastic bottle with hot water. Understandably, the roots will warm up slightly, but the better you can not do.But the plant itself is a little oklemaletsya.

After the onset of warm weather, the shelter can be removed, and the bush itself sprayed with a solution of epine or zircon. These adaptogens help plants survive stress and activate their own vital forces for recovery.

Council Do not rush to plant seedlings or sowing in open ground. Or plant a pumpkin on high beds with a thick substrate of manure. So the root system of the seedling will definitely be warm.

Pests

Pumpkin is a seductive delicacy for many insects, especially young shoots. And not only the leaves, but also the root system is a delicacy. Slugs, bear, aphid and other pests and strive to attack your landing. By the way, you may not notice them immediately. Find out only when the leaves turn yellow in the pumpkin.

Plants can be saved. With each pest his own method of struggle. For example, Medvedka will appreciate only your integrated efforts. Slugs imbued with your efforts after the soil around the landings will be generously sprinkled with coarse sand, ash or ground eggshell.

Aphids do not tolerate familiarity and spraying with any systemic insecticide. But strictly according to the recommendations of the manufacturer and in accordance with the instructions on the package. The spider mite will quickly leave your beds with pumpkin, if you occasionally treat him with sprays of onion or garlic peel infusions.

Sprout fly does not want to deal with you, if the plants will be covered for some time with a thick film, plastic bottles. And if manure (a favorite place for laying eggs) to be buried in the soil to a depth of at least 10 cm, without scattering over the surface, the germ fly will find another place to set up its manger.

Council Invasion of most pests can be avoided by regularly weeding the site. A deep podzimnaya digging will allow frost to get to the larvae and pupae.

Heat

Pumpkin leaves may turn yellow from the heat. More precisely - during the heat. It is a mistake to read that day watering from above (sprinkling) into a strong inflow can provoke sunburn on the leaves. In this case, supporters of this theory are recommended to watch other plants after the rain.How much will you notice steaming from the sun? How many of them burned? No one? Strange. And how does a pumpkin differ from other plants? And why should it burn?

Conduct an experiment at least once. In the very sun, when the pumpkin leaves lose turgor and sag, properly water one plant from above. It was like a rain. And look at him in half an hour. We are sure that after you see the result, in the heat you will not part with the hose. And it is right.

Sprinkling cools the surface of the leaf plate and moisturizes the surrounding air, which helps to avoid sunburn and, consequently, the yellowing of plants.

Council Water for day watering in the heat should not be icy. This can cause thermal shock to the plant. Warm will not give the desired effect. The best option is cool water in the temperature range from +20 to + 27 ° С.

Diseases

Plant damage by pathogenic bacteria or spores of pathogenic fungi is the most common cause of yellowing of pumpkin leaves. The most common diseases and methods of deliverance:

Root rot Unfortunately, this vile thing is not treated by anything. At first the stalk becomes thinner, then the foliage turns yellow and in the end the plant dies. It is impossible to save him. Even modern fungicides do not help.

Control measures are prevention. This is a mandatory decontamination of soil and seeds before planting. A strong hot solution of potassium permanganate or phytosporin perfectly copes with this task.

Chlorosis. A characteristic sign - the rapid yellowing of the leaves and their sharp thickening. Caused by a lack of potassium in the soil.

It is treated to a banal simple. First, remove all diseased leaves, then feed pumpkins with infusion of ash from deciduous wood. Liquid is applied under the root. Or simply choose a mineral fertilizer with a high content of potassium.

Mealy dew. It is dangerous that the whitish bloom on the leaves can be difficult to notice at the very beginning of the lesion. Pay attention to it only after the mass yellowing of the shoots.

There will have to use chemical control measures, because the disease has a fungal origin. Copper-based drugs, such as Bordeaux liquid, do a great job with this problem.They will not be able to cure pumpkins, but they will limit the further development of the disease.

Anthracnose. Cunning disease of fungal breed. It is activated with excessive soil moisture and air. At first the leaves turn yellow, then the fruits begin to rot, and soon the whole plant dies.

Preventive control measures. Decontamination of seeds, soil, plus airing plantings (do not thicken!). These are basic measures. At the initial stage of the disease, spraying with copper preparations helps. With a strong defeat, the plant will have to be thrown away so that the others will not get infected.

After reading this article and following the recommendations, depending on the situation, you will not have a question: why the leaves turn yellow in pumpkin. What to do? Now you know exactly how to help the plants. The rest is manual dexterity, speed of response to the problem and your personal desire to grow healthy tasty fruits.

Video: how to grow a good pumpkin crop