Soft scales are aphid-like creatures that feed on the nutrient rich sap of trees. Immature scales, called crawlers feed on leaves whereas mature scales will mainly feed on branches. Soft scales also secrete a waxy covering, but unlike armored scale it is an integral part of their body. All soft scales feed [...]
Keep reading →Mites are common pests in landscapes and gardens that feed on many fruit trees, vines, berries, vegetables, and ornamental plants. Although related to insects, mites aren’t insects but members of the arachnid class along with spiders and ticks. Spider mites, also called webspinning mites, are the most common mite pests and among the most ubiquitous [...]
Keep reading →Aphids (Aphidoidea) feed on the sap tissue using a proboscis. They produce enormous amounts of honeydew as their waste. Honeydew produces a sticky film on and underneath infested trees. Due to their feeding on sap tissue, they are easily controlled by systemic insecticides. Aphids do not need to mate, and are essentially [...]
Keep reading →The redgum lerp psyllid (Glycaspis brimblecombei) was originally from Australia. It was found in Los Angeles in 1998 and has spread throughout much of California since then. It also occurs in Arizona, Florida, Hawaii, and Mexico on a variety of eucalyptus.
Psyllids are plant-juice sucking insect in the insect family Psyllidae. [...]
Keep reading →The avocado lace bug, Pseudacysta perseae, occurs in the Caribbean, French Guyana, Mexico, and southeastern United States. As of 2006 it only appears in San Diego County. This bug is also known as the camphor lace bug, because it feeds on certain plants in the family Lauraceae. Hosts are the avocado fruit tree, other Persea [...]
Keep reading →The Diaprepes root weevil, Diaprepes abbreviatus (L.), is a large, colorful weevil, 3/8 to 3/4 inch (10 to 19 mm) long, with numerous forms, or morphs, ranging from gray to yellow to orange and black. Because of its broad host range, the Diaprepes root weevil poses a great threat to the citrus, avocado, ornamental, and [...]
Keep reading →Two closely related species of longhorned borer beetles are known to attack eucalyptus trees in California.
Phoracantha semipunctata, is native to Australia, was introduced into Southern California in the 1980s. It rapidly became a pest and now appears throughout the state wherever eucalyptus trees grow. Natural enemies were introduced from Australia, and [...]
Keep reading →Citrus leafminer larvae feed by creating shallow tunnels, or mines, in young leaves of citrus trees. The pest is most commonly found on citrus (oranges, mandarins, lemons, limes, grapefruit, and other varieties) and closely related plants (kumquat and calamondin). The citrus leafminer is the only mining insect that commonly attacks citrus leaves. Citrus leafminer, Phyllocnistis [...]
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