Sooty mildew usually seems as an unpleasant darkish, soot-like substance on the leaves and bark of your crepe myrtle. The first brokers liable for this challenge are bugs akin to aphids, scales, and leafhoppers. These pests produce a sticky fluid generally known as honeydew, creating a great atmosphere for sooty mildew to develop. This mildew can result in leaf discoloration and untimely leaf drop. To eliminate the mildew, you could give attention to eradicating these bugs. You possibly can wash them off of the leaves and bark with a high-pressure water jet or spray an insecticidal cleaning soap.
Powdery mildew is a fungal an infection that seems as a white powdery substance in your tree’s leaves and is extra prone to happen throughout excessive humidity and reasonable temperatures. Leaves can flip brown or yellow and flower buds can fall off the tree. Neem oil or fungicide sprays are helpful therapies for powdery mildew. Apply these within the early summer season to stop the illness from taking maintain.
Lastly, Cercospora leaf spot is infamous for inflicting darkish, spotty marks on the leaves, usually resulting in untimely leaf drop. It usually happens in shaded and damp areas. You will begin noticing the signs of this illness in midsummer or early fall. The preliminary plan of action must be to promptly take away any leaves displaying indicators of the illness, which is able to stop it from spreading. After that, insecticide remedy could be efficient in containing the issue.