Question
Prevention and/or control of Fascista Cererisella on Red Bud Tree Don Egolf

Answer
The most common insect to destroy the leaves of the redbud, the redbud leaffolder, can cause severe damage to the tree. The insects fold the leaves together and secure them with silken webbing. Within the webbing, the larva consume the leaf.
Systemic insecticides have been shown to be successful against the redbud leaffolder,

If the tree is small enough that you can spray all the foliage a spray is best but if the tree is too tall to reach the foliage use a soil applied insecticide. I would spray the foliage with Orthene. Or for larger trees use a product called Bayer Advanced Tree and Shrub Insect Control. This is applied to the soil around the tree and the roots will take it up to the foliage and when the insect feeds on the leaves they are killed. This product will give season long control and can be used on the smaller trees if desired. Here is a web link to this product--check with your local garden type store for these products.
http://www.bayeradvanced.com/tree-shrub-care/products/12-month-tree-shrub-insect...