A: I believe they are mealy bugs which are soft-bodied insects with a piercing-sucking mouthpart. They produce a covering of clumps of white, waxy threads. A by-product of mealy bug feeding is sticky honeydew which coats infested foliage… Read More
Category: Pests & Disease
Q: I have these small white specks on the back of my magnolia leaves. Can you tell me what they are and will they harm my magnolia?
A: At first I thought it might be some sort of tea scale but a closer look made me realize it was the pupa stage of some insect. I knew we probably needed to be concerned because there… Read More
Q: I have a sago palm that is covered with insects. The fronds actually look as though they are covered with snow. What insect is this?
A: The insect may be a scale insect called the cycad aulacaspis scale, Aulacaspis yasumatsui. It apparently originated from Thailand but it is kept in check overseas by local parasitoids. Of course, here in the U.S. this scale… Read More
A:Diagnosis of spots on leaves is often difficult but I was able to identify these pests easily once you sent them to my office. Believe it or not – they even survived the postal service delivery! The spots… Read More
Q: I have a wonderful area in my front yard with the perennial Gaura planted in it and love to watch the “sunny butterflies” dance around in the breeze. However, this year my gaura has some sort of… Read More
A: After seeing the tree clippings brought into the office, it was easy to diagnose the problem as Powdery Mildew, Erysiphe lagerstroemiae. Powdery Mildew first appears on new shoots as a whitish powder that later spreads to the… Read More
Q: Pesticide labels give a percentage of active and inert or other ingredients with percentage numbers. I understand the active part but what does inert or others mean?
A: I am answering this question by using information from the EPA government website. The EPA issued Pesticide Regulation Notice 97-6 after comments from the public indicated that consumers thought “inert” meant “harmless”. Inert ingredients have not been… Read More
Q: Several oaks in my yard have died. I have noticed numerous growths on the limbs, which are supposedly galls. I want to know if they are killing my trees and if they will spread to the other trees. … Read More
A: Oak leaf blister is a common leaf disease among oaks in Florida and is caused by a fungus. Although infected trees may have unsightly leaves, serious damage is uncommon. The fungus which causes leaf blister attacks only… Read More
Q: I have these growths on the stems of my oak trees. When I crushed the growth I discovered it contained small worms. Are these killing my trees? A: The structures are called galls and are generally caused… Read More