Gall mites are often found behind a white coating
In the case of yucca, the cause of a floury-white coating that can be wiped off is rarely the real thing Powdery mildew, a fungus that is otherwise not uncommon in many plants cultivated in the house and garden occurs. If you discover this type of damage on your yucca, you should start with it Gall mites think - tiny little animals that bare with eye are not to be discovered. Pesticides based on sulfur or rapeseed oil help against gall mites - just as they do against powdery mildew.
also read
- White toppings on the yucca palm are not just powdery mildew
- Yucca Palm Fungal Infection - And What To Do About It
- Powdery mildew on yucca is very rare
Mealybugs and mealybugs
However, a white coating is not only on gall mites, but sometimes also on plant lice such as Mealybugs or mealybugs traced back. In contrast to gall mites, lice cause sticky leaves with their sweet excretions, which can also cause the soil around the affected plant to stick. The stubborn little animals are best combated with tea tree oil: Mix 10 drops of tea tree oil with one liter of water and wash the leaves with it regularly. In the case of a strong infestation, however, the only thing that helps is to remove the relevant leaves and dispose of them with household waste.
Powdery mildew is rather rare on yucca
That’s on a yucca Powdery mildew (not to be confused with downy mildew, the whitish coating of which cannot be wiped off) seldom, but it does happen occasionally. The cause is a location that is too dry and / or too warm, which is why you should use the yucca during the The winter months should never be placed directly next to a heater and it is best to follow them in the summer put outside. Remove the infected leaves and spray the plant with horsetail tea. a tea tree oil and water mixture.
Tips
Downy mildew also has a white coating, but only develops in places that are too damp and too cool. Here, too, horsetail or tansy tea and the generous removal of infected parts can help.
