- Author: Karey Windbiel-Rojas
Originally posted August 26, 2016; edited July 10, 2018
Have you seen big green beetles in your California yard or garden? Or beetles feeding on your roses or other plants? There are many kinds of beetles commonly found in our landscapes, but the Japanese beetle is not one of them.
Many people think they've seen the Japanese beetle, a small scarab beetle with metallic green wings with white spots on the margins. However, Japanese beetles are generally not found in California.
The Japanese beetle is an exotic and potentially invasive pest for which the California Department of Food and Agriculture (CDFA) is conducting eradication efforts to limit its spread.../h2>
If you grow roses, you might be noticing damage on the flowers caused by hoplia beetles (Hoplia callipyge). Hoplia beetles, which are common between March and May, especially in the Central Valley, feed on the blossoms of light-colored roses and other flowers in your landscape.
Hoplia beetle adults are small, reddish-brown scarab beetles that are often found resting inside a blossom. If you hold one in your hand, you'll notice that most of the body is a beautiful, iridescent silvery green color in the sunlight.
These beetles may also occasionally be found feeding on other plants with light-colored petals.
Some people believe they have the rose chafer or Japanese beetle in their landscape, however...
Spring is a good time to begin monitoring for any lawn insect pests. Pest examples include various root, crown and leaf-feeding caterpillars, grubs like masked chafers, billbugs and chinch bugs.
Although insects can be serious pests of lawns, lawn damage is more frequently due to lack of proper cultural care and/or improper grass species selection for your area. An unhealthy lawn is more easily attacked by insects, weeds and diseases.
Insects are sometimes are blamed for lawn damage when the culprit may actually be disease-causing pathogens, dog urine, or abiotic causes such as leaving an item on the lawn for some time and inappropriate use of garden chemicals such as fertilizers and herbicides.
It's important to...
- Author: Andrew Mason Sutherland
[From the July 2015 issue of the UC IPM Retail IPM Newsletter]
Insect pests, though actually quite rare in well-managed lawns and turf, can sometimes jeopardize a flawless appearance, potentially sending people running to their local nursery or garden center for help.
The recently revised UC IPM Pest Note: Lawn Insects can prepare you with answers to keep lawns pest-free and BBQ ready this summer. This resource contains a wealth of information about lawn insect.../span>
Contrary to popular belief, insects are not a common cause of residential lawn damage in California, Lack of proper cultural care and use of inappropriate grass species in a particular location are much more likely to cause unhealthy or dying lawns than insects.
However, certain insects may occasionally damage or kill turfgrass. Insect feeding can cause grass to turn yellow or brown or die, especially if the grass is already stressed. Damage usually begins in small, scattered patches, which may merge into large dead areas. Insects that may cause damage in California lawns include various root-, crown-, and leaf-feeding caterpillars; grubs, which include the larvae of scarab beetles such as the black turfgrass ataenius and...