One of the most well-adapted trees for our area of the planet is the Crape Myrtle. Yes, it is a tree and not a bush. The Crape Myrtle suffers from very few ailments. However, several bugs just love them. The aphid and scale are the ones that are encountered most. There are several all-natural products to treat these pests, but one of the most effective controls are ladybugs. Why? I am glad you ask. Ladybugs are selective about what they kill. Insecticidal soaps and horticultural oils are non-selective. Lady Bugs love to eat aphids and scale plus we are not spraying insect killers over our head. Release them at night on the moist ground and they will hang around as long as the aphids and scale are there. When the food is gone most of them will seek out better accommodation. Unfortunately, if the pests return there are usually not enough ladybugs around to keep them under control. Our supply of ladybugs has been spotty this year.
In the synthetic control department, we have two systemic treatments: Tree and Shrub from Bayer Advanced and Tree and Shrub Insect Drench from the folks at Ferti-Lome. The main difference is cost and fertilizer, with the Bayer product taking top honors for both. They both work the same way. Mix per instruction and water the plants. Again we are not spraying insect killers over our head.