Why leaves turn yellow at the pumpkin. What to do?

Why leaves turn yellow at the pumpkin. What to do? Summer residents begin to look for the answer when their pet is already struck by some disease. Indeed, most often it is the ailment - the reason for the yellowing of the leaves. But there are other factors. But first things first.

Cold

Sometimes people plant pumpkin seedlings in open ground too early. The temperature of the soil and the surrounding air does not allow the plant to develop normally and the root system to work at full strength. This causes a sharp deficit of nutrients, the leaves turn yellow.

Interestingly, feeding pumpkins during this period will not produce anything. The roots do not work! What to do? Of course, insulate. First you need to put over the rastnitsy arc and cover with a dense plastic wrap. Inside, next to the stem, put a plastic bottle of hot water. Of course, the roots will warm up slightly, but you can’t do better anymore. But the plant itself is a little getting stuck.

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

Tip. Do not rush with planting seedlings or sowing in open ground. Or plant a pumpkin on high beds with a thick bed 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. Moreover, not only the leaves, but also the root system is a treat. Slugs, a bear, aphids and other pests strive to attack your landings. By the way, you may not immediately notice them. Detect only when leaves turn yellow at the pumpkin.

Plants can be saved. Each pest has its own method of struggle. For example, a bear will appreciate only your integrated efforts. Slugs will penetrate your efforts after the soil around the plantings has been generously sprinkled with coarse sand, ash or ground egg shells.

Aphids do not tolerate familiarity and spraying with any systemic insecticide. But strictly according to the manufacturer's recommendations and in accordance with the instructions on the package. The spider mite will quickly leave your pumpkin beds if you periodically treat it with sprinkles of onion or garlic husk infusions.

A sprout fly will not want to deal with you if the plants are covered for some time with a dense film, plastic bottles. And if manure (a favorite place for laying eggs) is embedded in the soil to a depth of at least 10 cm, without scattering on the surface, then the sprout fly will find another place for the construction of its manger.

Tip. The invasions of most pests can be avoided by regularly weeding the site. A deep winter digging will allow the frost to get to the larvae and pupae.

Heat

Pumpkin leaves may turn yellow from the heat. More precisely - during the heat. It is customarily mistaken to read that daytime watering from above (sprinkling) into strong hell can provoke a sunburn on the leaves. In this case, supporters of this theory are advised to observe other plants after rain. How much will you notice smoking from the sun? How many of them burned out? No one? It’s strange. But how is pumpkin different from other plants? And why should it burn out?

Perform an experiment at least once. In the sun, when the leaves of the pumpkin lose turgor and sag, carefully water one plant from above. As if the rain had passed. 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 the appearance of sunburn, and consequently the yellowing of plants.

Tip. Water for daytime irrigation 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 ° C.

Disease

Damage to the plant by pathogenic bacteria or pathogenic fungal spores is the most common cause of yellowing of pumpkin leaves. The most common diseases and methods of getting rid:

Root rot. Unfortunately, this vile thing can not be cured. First, the stem becomes thinner, then the foliage turns yellow and at 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 disinfection of soil and seeds before planting. The strong hot potassium permanganate solution or phytosporin perfectly copes with this task.

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

It is treated simply to the commonplace. First, all diseased leaves are removed, then the pumpkins are fed with infusion of ash from deciduous wood. The liquid is applied under the root. Or simply choose a fertilizer with a high content of potassium.

Powdery Mildew It is dangerous because a whitish coating on the leaves can be difficult to notice at the very beginning of the lesion. They pay attention to it only after the mass yellowing of the shoots.

It will have to use chemical control measures, because the disease is of fungal origin. Copper-based products, such as Bordeaux fluid, 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. An insidious disease of a fungal breed. It activates with excessive soil and air humidity. First, the leaves turn yellow, then the fruits begin to rot, and soon the whole plant dies.

Preventive measures. Disinfection of seeds, soil, plus airing of plantings (do not thicken!). These are the main measures. At the initial stage of the disease, spraying with copper-containing preparations helps. With a severe defeat, the plant will have to be thrown away so that the rest do not become infected.

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

Video: how to grow a good pumpkin crop