Insecticides applied for hickory shuckworm and pecan weevil will control the webworm. Control of webworms in the urban area can be accomplished by pruning out webs and removing egg masses. This webbing is from an insect called a psocid, or more commonly called bark lice. These insects feed on molds, fungi, pollen and fragments of dead insect and therefore do not represent a problem to either the crop or to the tree. The powdery mildew fungus develops only on the outside of the shuck where it feeds on the outer layer of plant cells.
Powdery mildew can develop at very low humidity and becomes very obvious during the mid-summer.
This fungus is not a problem and does not warrant any type of control. Powdery mildew has become very obvious but is not a problem. There are no insect problems at this time and pecan scab has been very light. I have not heard of any problems yet that will require a spray very soon. They are out there but at low numbers in the orchards I looked at.