How to treat pepper for foliage diseases?
Pepper is a rather capricious culture that is prone to fungal, viral and bacterial infections. Peppers are often attacked by garden pests, and in addition, plants die from improper care and lack of trace elements. That is why plants especially need processing and, last but not least, foliar top dressing.
Causes of diseases
If you notice that your peppers are withering and drying, pale or brown spots, pimples and holes appear on the leaves, the green parts turn red or yellow, become lemon-colored and turn over - most likely the plant is affected by the disease. The causes of pepper diseases are very diverse, they can be divided into several categories:
- fungal;
- viral;
- bacterial;
- non-infectious.
Fungi are the most common cause of crop problems - their spores are literally everywhere, so they can easily get on a young plant and lead to its defeat.
Bacterial and viral problems are associated with pathogenic microorganisms that penetrate the soil and cause the death of the green part of the plants. In addition, they are often transmitted from one bush to another and infect plants both in the greenhouse and in open areas.
Non-infectious causes have a different origin:
- unsuitable temperature conditions;
- illiterate moistening - excessive or vice versa insufficient watering;
- soil poor in organic and mineral substances;
- improperly carried out fertilizer;
- drafts and prolonged exposure to wind;
- temperature fluctuations.
The most common fungal infections include black leg, late blight, powdery mildew, fusarium wilt, and oedema and gray rot also often appear.
Among bacterial lesions, soft bacterial rot, bacterial wilt, black spot and bacterial canker, as well as verticillium are most common.
Among the viral ones, the most common are cucumber and tobacco mosaic, streak and stolbur.
Quite often, the wilting of a plant is associated with non-infectious causes - they are caused by care errors, namely:
- excessive soil moisture – typically caused by over-watering or clogging container drains;
- dry air - this applies to plants at the stage of growing seedlings: many make a fairly common mistake and put boxes near the battery, in which case the leaves die and quickly fall off;
- lack of protection against wind and drafts - the plant should be planted near higher crops (eg corn) that will hold back gusts of wind.
There are other problems that often cause foliage to turn yellow:
- root underdevelopment - the cause of such a pathology may be the cultivation of seedlings in a small container or an incorrect pick;
- poor watering - peppers are very sensitive to lack of moisture, with a lack of water, the leaves very often dry and fall off.
With a lack of certain minerals, the plant may show the following symptoms of diseases:
- nitrogen - leads to yellowing of the leaves and their fall;
- calcium - causes the appearance of gray-yellow spots;
- potassium - manifested in the twisting of sheet plates.
By the way, twisting, the appearance of holes and deformation of sheets are often signs of an attack by a spider mite and other garden pests.
And of course, garden parasites have a detrimental effect on peppers: slugs, aphids, and the Colorado potato beetle.
Choosing a tool
The modern market for products for gardeners and gardeners offers a wide selection of all kinds of drugs that successfully fight many different diseases of peppers and other crops. They may have a specialized, or they may have the most general effect.
For example, Bactofit and Fitosporin help with black leg and gray rot, Previkur has proven itself well to combat late blight, and Fusarium disappears after treatment with Gliocladin or Trichodermin.
For all types of fungal infections, copper-based fungicides can be used - copper sulfate, oxychom or Bordeaux mixture.
Folk remedies help well. So, to eliminate powdery mildew, experienced gardeners advise spraying the plant with a soap-salt solution, as well as a decoction of horsetail or whey.
In diseases caused by bacterial lesions, copper-containing compounds are most often used, for example, copper oxychloride. By the way, these drugs should be purchased even if the causes of the disease cannot be determined. However, keep in mind that such products are very toxic and can cause harm not only to pathogens of peppers, but also to people, therefore, protective equipment is required during work - gloves and, if possible, a respirator.
But viral pathologies are not treated, the diseased plant should be uprooted and burned.However, for prevention, it can be recommended to treat the green parts of the seedlings with a weak solution of potassium permanganate or skimmed milk.
As a preventive measure, decoctions of various herbs have also proven themselves: wormwood, onion, tansy, dandelion, and yarrow. It will not be superfluous to add plant immunity stimulants to the resulting infusions and decoctions - aloe juice, succinic acid or ready-made formulations such as Zircon, Immunocytofit or Inta-Vir. Such manipulations give a very good effect: - they destroy all pathogenic microflora, repel unwanted insects and their larvae, and in addition, stimulate natural immunity.
Many problems can be avoided if you plant peppers with the right neighbors, for example, if you plant peppers and potatoes or tomatoes in close proximity, then most likely you will not be able to avoid "acquaintance" with the Colorado potato beetle. In this case, you should purchase special insecticides that are updated and improved almost every year.
When attacked by slugs, you can pollinate the leaves with a mixture of tobacco dust and dry wormwood - for these unpleasant mollusks, this combination works very effectively, in addition, you can use a decoction of celandine.
When infested with aphids, insecticides should be preferred. The best reviews were won by the drug "Decis", which allows you to get rid of even aphid colonies, as well as their companions - ants.
Pests such as whiteflies and garden spider mites cause great harm to the green parts of the plant. To get rid of the misfortune, peppers should be sprayed with an infusion of green garlic or onions, and for the greatest adhesion to the leaf plate, it is advised to add a little laundry soap to the solution.
Keep in mind that any disease should be treated at the very initial stage, when there are too many pests, it is much more difficult to get rid of them. In addition, at the stage of formation and ripening of fruits, the possibilities of using insecticides are seriously limited, since they can get into the fruits and impair their nutritional and taste properties.
Peppers respond very well to a variety of foliar top dressing. Most often, in order to feed the pepper, potassium sulfate, superphosphate and nitrogen-rich urea are used, in addition, experienced gardeners recommend making an infusion of nettle.
plant processing process
Spraying the leaves of plants can be carried out in two cases - for pest control and as a foliar top dressing. It has been proven that plants absorb nutrients through the leaves and young stems no worse than through the roots, and the digestibility of such compounds is quite high. That is why plants can be fertilized and treated by spraying the green parts - stems and leaves.
The use of foliar processing is recommended in the following situations:
- excessively high or low soil temperature - in this case, the absorption of nutrients by the roots is problematic;
- too high a degree of moisture in the earth;
- overestimated soil acidity - in this case, the plant practically does not absorb phosphorus, potassium, nitrogen and calcium.
And of course, spraying is used to combat diseases that affect the green parts of the crop.
Foliar spraying is widely used by gardeners when stressful situations arise for plants - with temperature fluctuations, transplanting, or the risk of developing infections.
Spraying is a fairly popular way to fertilize a plant, as it contributes to:
- growth of deciduous mass;
- active formation of ovaries;
- rapid ripening of fruits;
- better absorption of all minerals and vitamins.
Keep in mind that for foliar top dressing, more concentrated solutions are used than when fertilizing the ground, but try to avoid too high dosages, since in this case it is quite easy to burn the leaf plate.
Regardless of the purpose of spraying - top dressing or treatment, treatment should be carried out in the evening, best at 18-19 hours, since at this moment there are no direct ultraviolet rays, so that the plant has time to absorb the applied funds. It is advisable to carry out procedures at a temperature not higher than 22 degrees. It has been noticed that in cloudy weather, nutritional and therapeutic components are absorbed much more efficiently, but rainy weather is not suitable for processing - drops of water will simply wash off the preparations from the surface and the effect of their application will be zero.
Pay special attention to spraying the inside of the sheet - in this place the plates have a highly porous structure, so absorption is much faster.
Spraying requires special tools. If you plan to process single bushes, then a simple spray gun will suffice, and if large areas need processing, then you need to purchase a large capacious sprayer.
Prevention measures
As they say, the disease is easier to prevent than to cure, and sweet pepper diseases are no exception.The vast majority of lesions of this culture cannot be cured, therefore, maximum measures must be taken to prevent the development of pathology.
To strengthen the plant's resistance to crop diseases, it is necessary to spray them every 1.5-2 weeks with special biological products or decoctions and infusions according to folk recipes. Most gardeners agree that pests can be repelled by spraying the leaves with infusions of strongly smelling plants: wormwood, garlic, onions or marigolds.
In addition, measures related to the treatment of bushes with solutions of potassium permanganate and boric acid are highly effective - such measures will help prevent a lot of problems by protecting plants from the moment the first sprout appears until the end of the harvest.
And of course, it must be remembered that the prevention of the development of bell pepper diseases cannot be reduced to spraying alone. Only a set of measures, including seed disinfection, soil disinfection, compliance with crop rotation rules, fertilizing and digging the soil for the winter, will help minimize the risk of encountering infections with any garden crop.
For information on what to do if the pepper leaves curl, see the next video.