Description of powdery mildew with a photo, pathogens and signs of damage!
Presented the powdery dew with a description and photos. We list the pathogens on various plants, shrubs and trees, considering signs of infection with a fungus. We also look at false powdery dew (peronosporosis) and its characteristics.
Fulfillment Tau: description
This is a common fungal disease that affects a large number of species of plants, bushes and trees. It is also called underwear or ash.
Infection is often transmitted by sucking pests – thrips, shield, powdery worm, whitefly, especially often tolerates aphids. Also, spores of the fungus can get when watering with water, transmitted from infected specimens through the air or when contacted with a person.
The development of a fungal disease is facilitated by high humidity (60-85%), moderate air temperature (16-28 ° C), an excess of nitrogen and excessive plant density. Under open ground, the disease appears from the end of May and develops until deep autumn. The peak of Ash’s development falls in June-July.
The causal agent of the disease
In the role of pathogens act microscopic fungi – the order of powdery or eryziph (Erysiphales). At the same time, with damage from different genera of fungi, the symptoms of the disease are similar.
Common types of pathogenic fungi belonging to Birth include: Erysiphe, Microspara, Phylctinia, Podospara (previously Sphaerotheca), and Uncinula. Some types of them affect specific plants, shrubs or trees.
Around the world, the most common pathogens of powdery mildew are Erysiphe Cichoracearum and Podospar a-Fuliginea.
- Blumeria graminis – cereal plants (cereals), turf creter
- Erysiphe Alphitoides—Oak
- Erysiphe cichoracearum – Astrov family. Astra, Marigolds, Georgina, Calendula (nails), Margarita, Sunflower and Zinnia.
- Erysiphe Cichoracearum, Podospara Fuliginea, Podospara Fusca – Pumpkin Family (Watermelon, Cantaloupe, Zucchini, Lagenaria, Squash, and Tsuckini)
- Erysiphe Cruciferarum – Pants, cabbage, turnip, beet
- Levellula taurica—Onions
- Microsphhaera diffusa—Soya
- Monilinia fructigena, Podosparapannosa – The family of pink. Plum subfamily: apricot, quince, cherry plum, hawthorn, cherry, pear, peach, mountain ash, plum, cherries and apple trees. The family is pink: strawberry, strawberry, raspberry, rose and rosehip.
- PODOSPARA CLASTESTINA – Apricot and Peach
- Podospara Leucotricha – pear, apple tree
- Podosparamacularis – hops
- Podosparamors AVAE Goose Helmets, Black and Red Currants
- Uncinulanector – grapes (Oidium – powdery mildew on the vine)
signs of defeat
On the surface of the aerial part of the plant (often leaves, young shoots and trunk) white powdery spots with spores of the fungus are visible, they ripen and freely fill liquid drops resembling dew.
In most cases, the disease appears on the leaves close to the ground when fungi live in the soil. With the development of infection, the spots become larger and denser, a large amount of strife is formed, and the ash can move the plants up or down.
The fruit infected with the fungus crack and rot, and the flowers and buds fall, and the plant grows up.
Puffy dew on a pumpkin leaf
Features of the lesion in different plants, shrubs and trees
Powdery mildew on cucumbers in greenhouses spreads with drafts and insufficient lighting against the background of a weakening plant. Most often, cucumbers near doors and air vents are the first to become infected. A fungal disease can destroy vegetables very quickly. Vegetables from the pumpkin family lose 40-60% of the harvest from ashtrays, and the quality of the fruits also deteriorates.
Strawberry, strawberry, raspberry, rosehip and rose
In these species, the entire aerial part is affected, especially the leaves. Their edges are deformed and the leaves become rough with a bronze tint on the inside. Leaves affected by powdery mildew are particularly noticeable in August-September. A powdery coating is visible on the berries and fruits, and a specific aroma of the mushroom is heard.
On ornamental plants, the leaves darken and fall off white.
Gooseberry and currant
In the early 1960s, powdery mildew pathogens migrated from gooseberries to blackcurrants, and since then gardeners have been fighting the disease on both shrubs. The infection bends the shoots and slows growth, the leaves become smaller and wither. Gooseberries still suffer from fruit – white spots appear on them, which darken over time.
To treat the infestation of gooseberries and currants, it is important to cut off the affected tips of the shoots in spring. Before the flowering of the bushes and after picking the fruits, it is recommended to spray them with preparations or folk remedies.
Pear, peach, plum, apple tree
A fungal disease affects young shoots, leaves, flowers and fruits on trees. Shoots and buds die off in winter, and infection reduces the specimen’s hardiness. The leaves stop growing, deform and crumble.
The infection is particularly active in old trees. Trees growing on the southern and southwestern sides of the hill suffer more from powdery mildew. It is important to prune the affected parts and spray with fungicides while isolating the buds.
Powdery mildew can affect a wide variety of plant species, shrubs and trees. We list the species that the fungus most often affects.
- Vegetables: lettuce, dill, spinach.
- Grain crops (cereals): wheat, barley.
- Ornamental Plants (Flowers): Aster, Marigold (Tagetis), Dahlia, Gerbera, Hydrangea, Larkspur, Daisy, Petunia, Rose, September, Phlox and Chrysanthemum.
- Trees: apricot, quince, cherry, pear, oak, maple, peach, rowan, plum, cherry and apple.
- Other crops: watermelon, lawn grasses, peas, melon, calendula (marigold), mint, sunflower, rosemary, soybeans, tobacco, hops.
- Shrubs: barberry, hawthorn, bunch of grapes, honeysuckle, gooseberry, almond, lilac, currant, hazelnut (filbert, hazelnut) and dogrose.
- Vegetable crops: zucchini, cabbage, potatoes, onions, cucumbers, peppers, turnips, turnips, tomatoes, squashes and garlic.
- Berry crops: strawberries, strawberries, raspberries.
- Indoor plants: balsam, gloxinia, potted gerbera, dracaena, kalanchoe, indoor rose, laurel, orchid, pedilanthus, violet (Saintpaulia), ficus, yucca.
Powdery mildew on grapes
Downy Mildew (Peronosporosis)
Outwardly, mycoses of the disease resemble powdery mildew, but their causative agent are fungal organisms from the class of Oomycetes – the family Peronosporaceae.
Signs of defeat and where it comes from
The infection affects the leaves. Yellow spots of various shapes can be seen on the upper side and a gray coating of spores on the underside. With the development of downy mildew, the spots turn brown and brown (tissue necrosis) and increase in size, and the light spore coating darkens.
Folding infected leaves, turning yellow and fading. The disease destroys the leaf tissue and, in rare cases, affects the trunk or the leaf.
1. Peronosporosis 2. mildew powder
Wrong mildew appears from no n-sterilized land (especially with high acid and low breathability) and not disinfected seeds.
The disease quickly develops under natural conditions – cold nights with long tau periods and in the greenhouse with high humidity and poor ventilation.
This disease is more common in greenhouses and under open diseases than mildew.
Additions to the article:
We then finish the idea of fungal diseases. We hope that the information described will help you determine the disease.
We wish that this disease does not interfere in the garden/garden or greenhouse!
Fulfill dew on trees and crops: apple tree, peach, wheat
The mildew is known to many gardeners and gardeners because it is one of the most common diseases of both street and inner plants. The preferred location of the parasitic mushroom settlement is vegetables and flowers. But a special look is committed to apple trees. This erysiphales mushroom is mentioned. But not only apple trees suffer from their parasitic effects. Pathogenic disputes also opted for peaches, pears and even oaks.
The mildew of the apple tree manifests itself in a classic type of parasite for this type. Disputes are activated in spring with the insertion of heat, namely +16- +24 degrees. First of all, a bright white badge appears, which gradually spreads and escapes on the largest part of the sheet. Then more and more leaves are becoming whitish. After a while, the attack begins to darken until it becomes black at all. This tire in mushrooms. At the end of summer and early autumn, they crumble in the ground for winter or with fallen leaves.
Symptoms of mildew on the apple tree, pear and peach
Persian tree is most susceptible to the effects of a fungal disease. A badge can not only cover leaves, but also inflorescences, with the access of nutrients overlapping. For this reason, the yield is significantly reduced. The leaves of fruit trees on which mildew is available are also twisted, dry and fall off.
In the early stages of the development of the disease, white spots can easily be removed from the surface of the leaf, but after a while they appear again in more quantities. To spread the spore, the mushroom uses different types:
- Insect dishes;
A characteristic of mildew is that disputes of 50 to 90 days can spread.
In order for the Myzel to develop successfully, it needs the following conditions:
- increased humidity that occurs after rain or abundant irrigation;
- Air temperature from +17 to +25 degrees;
- The wel l-kept area in which fallen leaves are not removed;
- Thick vegetation where cultivation plants are mixed with weeds.
The mildew is grain
Cereal plants are also subject to this fungal disease. Particularly strongly affected by rye, barley, wheat, oats and others. The cells are affected by Haustor and the leaves die. The cause of the infection is the infected layer of the earth, the plants of winter plants and plant remains in the fields. As a rule, it is the winter reason that causes the disease in spring.
In order to avoid the appearance of plaque on the leaves of the apple tree, it is necessary to carry out preventive measures, such as: B.:
- Regularly rejuvenate trees;
- Avoid excess irrigation;
- Destroy infected shoots by burning;
- Remove leaves in good time;
- To dig out the floor near the tree trunks.
Such events are not only suitable for the apple tree, but also for other trees such as peach, pear, maple, oak, etc.
Arbat, Goldrausch, Bridgam Delishez, Florin.
Mildew on oak and maple
Mostly young trees under the age of 30 are exposed to infection, but the leading raids can also appear. However, older oaks are ready with the disease alone or live with her for a long time. If the fungus has spread to the run, this means that the tree dies. The task for forest bikes is to struggle with mildew under the conditions of forest planting, and standard pilgicides are used for treatment within the limits of the decorative green zone.
Mildew on sunflower
The difficulty in the fight against the mushroom on the sunflower is that the renewal of the disease comes from the previous harvest. Myceliums were overwintered in the ground and with the insertion of the heat, they are ready to attack plants again. With increased air temperature, active maturation and spread of the dispute occurs. The sunflower can also affect false mildew or peronosporosis. The treatment is the same in both cases.
Powder Dew Gorokha
The disease is caused by the erysiphe communis Ms. Mushroom. f. Pisi Dietr. In the beginning, a white badge appears on the leaves, then it gradually becomes brown and spreads out on the stems and fruits.
Sustainable varieties: Erbsen Oscar, Alpha, Ambrosia, Vera.
Chemical drugs to combat mildew
- One of the correct possibilities for combating the parasite is the treatment of the plant in the early stages of the disease of colloidal gray. Fulgicide is sold in the form of a powder and diluted at a speed of 30 g per 10 liters. Water. The air temperature in which it is recommended to carry out the processing should fluctuate within +20 – +28 degrees.
- The dru g-Tiovit beam has the main substance sulfur of the main actors, so the method of breeding and use is similar to colloidal silver.
- The most common “Topaz” drug is effective both in the early stages of manifestation and later with the fungus. The solution is produced at a speed of 5 liters. Water is taken 2 ml. Middle. It is advisable to repeat the processing after two weeks.
- Many gardeners use scorch, the action of which is most effective at +14 – +25 degrees. The solution is made from 1 ml. Drug and 5 l. warm water.
- Strobi is a system medication that is used for many diseases. In 10 l. Water is bred 2-4 g.
All of them are unsure for one person, but powerful against the disease. You cannot change the dosage specified in the instructions. Make sure you adhere to security measures. Many medications are so effective that they are only recommended once. For muesli and fruit trees, it is recommended to use biofungicides.
Fungicide topaz fungicide thiotive jet fungicide strobe
Popular remedy of the fight against mildew
The advantage of folk methods is their security for humans. But it is best to use it to prevent the disease or in the early stages. An additional advantage is that only a few of the substances used are nutrients.
- Milch serum is one of the bes t-known folk methods to combat the disease. In 5 liters. Water is diluted 1 liter. Add serum and 10 drops of iodine. You have to process plants every 2 weeks.
- Colloidal sulfur effectively not only removes mildew on apple trees, pears and peaches, but also fought perfectly plant mites, ascochitosis, anthracnosis. A solution from 20 g 2% sulfur per 10 liters is produced. Water. The first treatment takes place in front of flowering trees, the second after flowering and the third after 20 days. But absolutely up to 20 days before the harvest.
- An ash solution is effective that is diluted at 1 kg. for 10 l. Water. The solution is infused for 3 days with occasional stirring. Many gardeners add a spoon of grated wash soap. This happens so that the drops do not immediately turn off the leaves, but linger to combat the fungus.
- Baking powder is also used as a preventive remedy for real mildew. The composition is based on 2 tablespoons. Spoon soda, spoon grated soap and 5 liters. Water.
- Cow diligence is taken (preferably fresh) and diluted in a ratio of 1:10. Infused for 10 days. After that, you also have to dilute water in a ratio of 1:10 and process the bushes.
Real mildew is most frequently removed with an ash solution or soap loute. I have been using it for 10 years now and have managed to get rid of a complete infection every year. But it was not possible to completely destroy the fungus. Preventive measures do not help, it still falls on the plants with a white covering.