Damaging Insects & Diseases
Japanese BeetleJapanese Beetles are small (1/2 inch) metallic green insects with bronze wing covers. The adults feed during the day on a wide variety of plants. They devour flowers, ripening fruit, and tender leaves with small veins, but only eat the tissue between the veins on tree leaves. The adults live for thirty to forty-five days and are most abundant in late July.
Lace BugLace Bugs are small (1/8 inch) insects. The adults have delicate, clear wings that they hold over their bodies. They commonly feed on azaleas, sucking the cell contents from the underside of the leaves, producing a mottling or speckling on the upper surface. There are many species of lace bugs. The most common is the (Stephanitis) on Azaleas and Rhododendrons.
Leaf MinerA leaf miner is the larva of an insect that lives in and eats the leaf tissue of plants. They feed by creating shallow tunnels, or mines, in young leaves of citrus trees. The damage is unsightly, and if left untreated, can end up causing serious damage to a plant.
Leaf SpotLeaf spot is a common descriptive term applied to a number of diseases affecting the foliage of ornamentals and shade trees. The majority of leaf spots are caused by fungi, but some are caused by bacteria. Leaf spot may result in some defoliation of a plant.
MoleMoles are small grey to black mammals with fine velvety fur. They have hairless snouts and inconspicuous eyes and ears. Their eyesight is poor but they have superior senses of smell, touch and hearing. Their front feet are much larger than their hind feet and have long trowel-like claws used for tunneling in the ground. Moles live in burrows made up of many interconnecting runways that are usually about 6-8 inches underground.
Powdery MildewPowdery mildew is probably the most familiar plant disease. Unlike most other fungus diseases of plants, it grows on the outside of leaves, forming a gray or white “powder”. Also, unlike other fungus diseases, which only infect wet leaves, powdery mildew invades dry leaves as well.
Symptoms of Pythium blight are evident during warm, humid weather when turfgrass leaves are wet for at least 12 hours. The disease is particularly severe when daytime temperature exceed 82 degrees F and night temperature fail to fall below 68 degrees F. Initial symptoms appear as dark green to purple water-soaked leaves that aggregate into circular or irregularly shaped patches in turfgrass. Patches of infected grass can enlarge causing severe damage to lawns.