Powdery Mildew:
Powdery Mildew is a fungal disease that can cause distorted growth of foliage and cause witches brooms on new growth in trees and shrubs. Powdery mildew infections are readily diagnosed by the white to gray powdery growth on leaves and shoots. Causes of powdery mildew are due to a combination [...]
Keep reading →Hard or Armored Scales are aphid-like insects that produce a hard waxy shell to protect themselves from predators and environmental conditions. Armored scale females resemble legless bumps and damage plants with their sucking mouthparts. The smaller male scales have wings and while in the nymph stage also feed on plants. Female scale [...]
Keep reading →Many insects have the potential to devastate a single specimen of tree or a whole stands of trees. However, insects that bore into a tree to feed on living wood tissue are at the top of the list of destructive pests. Almost all trees and shrubs are able to be attacked from boring insects. Healthy [...]
Keep reading →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 [...]
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