Content
- Correct the causes of white plaque on grapes
- The classic symptoms
- Combat white plaque on grapes biologically
- Preventive measures
- Tips & Tricks
Correct the causes of white plaque on grapes
If grapes are covered with a white coating, this symptom indicates the attack by powdery mildew. The fungus genus Oidium has specialized in grapevines. How to combat the infection in the hobby garden.
The classic symptoms
The mushroom spores overwinter within the vines in a mycelium. Here they lurk from spring on suitable weather conditions to spread. Moist and warm summer weather with cool nights and warm days is especially convenient for the parasites, as the dew on the leaves promotes germination. Based on these symptoms, the infection can be recognized:
In continuous rain the infestation pressure decreases, because mildew on grapevines depends on changing weather conditions.
Combat white plaque on grapes biologically
In an early stage of infestation, the chances are good to counteract the mildew on grapes by natural means. Among the home remedies, soda has proved to be quite effective. Dissolve 1 heaped tablespoon of soda in 2 liters of water and add 15 milliliters of curd soap or vegetable oil. Fill this mixture in a hand sprayer and treat the infected grapes every 2-3 days.
In addition, milk has proven to be excellent in preparing the fungal spores. Dissolved in water at a ratio of 1: 5, spray the mixture repeatedly. Alternatively, add 3 sachets of baking soda and 4 tablespoons of vegetable oil to 5 liters of water. After each downpour, the treatment is refreshed until no white coating is visible.
Preventive measures
So that it does not even come to the unappetizing white mushroom lawn, these measures make a valuable contribution:
Tips & Tricks
Experienced hobby gardeners consider the use of biological fungicides a timely change of active ingredient. The Oidium fungal spores and all conspecifics have the ability of resistance to the natural control agents. A consistent anti-resistance management counteracts this.
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