2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Powdery mildew of a rose is dangerous in that it spreads at an incredible speed not only throughout the plant, but also is transferred to the bushes growing in the neighborhood. As a result, beautiful rose buds are deformed and dry out, and the bushes of the queen of flowers wither before our eyes and often die. Especially often the ill-fated attack affects indoor and greenhouse roses. By the way, powdery mildew has been attacking roses since time immemorial - the first mention of it dates back to 300 BC. NS
A few words about the disease
On the leaves with stalks attacked by powdery mildew, as well as on young pink shoots, the formation of a whitish bloom similar to flour begins. And after the spores mature, a liquid similar to dew drops is also released. In general, the appearance of plaque can vary depending on the climate and various characteristics of the varieties of roses.
At first, the spots are easy enough to wipe off with your fingers, and under them there will even be no visible damage to the living tissue of roses. However, gradually they will begin to spread over all pink plantings, turning into a solid, clearly visible bloom. The leaves curl and begin to fall off, young shoots die off, the stems bend, and the flowers become very ugly.
The causative agent of the infection is a fungus called Sphaerotheca pannosa. The infection develops especially quickly if humid and hot weather sets in during the day, and with the onset of night, the temperature drops significantly and condensation forms on the pink leaves as a result. If the weather is cool and dry, powdery mildew hardly appears.
How to fight
It is much easier to prevent powdery mildew than to fight it later. In the fall, it is necessary to eliminate all infected shoots from the plots, as well as remove all leaves from under the rose bushes and burn them. It is advisable to periodically apply ash under the bushes, and after its introduction, carefully dig up the soil with its obligatory turning over in order to significantly impede the access of air to the pathogen.
For preventive purposes, it is recommended to spray pink bushes with a 3% solution of copper sulfate.
In the event of powdery mildew, all nitrogen-containing dressings should be excluded, since they stimulate the development of the fungus to a large extent. And the above-mentioned ash and potash fertilizers will help increase the resistance of roses to an unpleasant ailment.
If the rose powdery mildew is in the initial stage of development and has not yet managed to cover the entire rose garden, it is best to deal with it with organic preparations: dilute 200 grams of wood ash or 1 kilogram of manure in ten liters of water, insist for five days, strain and start spraying bushes. Powdery mildew mycelium usually dies rather quickly from microelements of ash and from bacteria contained in manure. Such treatments are carried out every five to seven days until the moment when the symptoms of powdery mildew disappear completely. In addition, these funds simultaneously perform the function of an incredibly effective foliar feeding, which increases the resistance of roses to various diseases and gives strength to the bushes.
By the way, spraying with manure and ash is a good idea to alternate with treatments with soda ash, 50 grams of which is dissolved in ten liters of water.
Another effective remedy, and much stronger than the ones described above, is a copper-soap solution. For its preparation, a piece of laundry soap grated on a grater is dissolved in nine liters of water. It is recommended to pre-soften strongly hard water with baking soda. Then, 20 to 30 g of copper sulfate are diluted in a liter of water, after which it is poured into soapy water in a thin stream, stirring with a wooden stick.
You can also purchase products specially designed for getting rid of powdery mildew: Benomil and Topsin. Roses are treated with these preparations three to four times, observing an interval of one and a half to two weeks.
Recommended:
Saving Gooseberries From American Powdery Mildew
American powdery mildew, also called spheroteka, is one of the most dangerous and unpleasant fungal diseases of the gooseberry. In addition to gooseberries, this ailment can also overwhelm currants from time to time: black - to a greater extent, and white and red - to a lesser extent. Mainly fruits suffer from this scourge, as well as vulnerable shoots and leaves. In gooseberries, berries are predominantly affected, and in currants - stalks with fruit twigs, and only sometimes berries
The Simplest Remedies For Powdery Mildew
Powdery mildew is an extremely unpleasant problem that gives summer residents a lot of trouble. Bright pumpkin, juicy zucchini, spectacular roses, wholesome gooseberries or crunchy cucumbers - all of them can be amazed by this ill-fated ailment. However, not only them - powdery mildew attacks a truly incredible number of other cultures. How to overcome it? You should not think for a long time in search of an answer to this question, because this can be done using the simplest means that it will not be difficult to prepare with your own hands
Get Rid Of Powdery Mildew On Plants
Powdery mildew is an unpleasant fungal disease that spreads at a tremendous speed. Fungi, drawing nutrients from plants, make them look unsightly. So that the vegetation does not die, it is necessary to take prompt measures to cure such an unpleasant ailment
Apple Powdery Mildew
Powdery mildew is usually found on apple trees in early spring, when tiny buds begin to bloom on the trees. Leaves with shoots are affected by this scourge almost simultaneously. The growth of apple trees when affected by powdery mildew slows down or stops altogether, and the leaves slowly fade and, having dried, fall off. Flowers and buds are scattered, and with them the chances of a good harvest are gradually melting. Often, as a result of the defeat of this scourge, the yield of the fall
Powdery Mildew Of Pumpkin Crops
Powdery mildew attacks almost all pumpkin crops, and cucumbers with melons in particular. She also does not bypass pumpkin, watermelons and squash with zucchini. And it does not matter at all in what kind of soil these crops are grown - in the open or in the protected. In a warm and dry climate, powdery mildew is incredibly harmful. To a large extent, its spread is also facilitated by excessively sharp fluctuations in humidity and temperature
