[From the February 2013 issue of the UC IPM Green Bulletin newsletter]
During the last 10 years, a new widow spider has moved into parts of Southern California. The brown widow spider, Latrodectus geometricus, is closely related to the well-known black widow spider, L. hesperus, (Figure 1) that occurs throughout much of California.
A recent survey of widow spiders in Southern California led by retired UC Riverside entomologist Richard Vetter revealed new information about the distribution of brown widows. Currently brown widow spiders.../span>
Are you frustrated trying to pull out dandelions by hand? Do they just keep coming back? If so, have you considered using a specialized weed removal tool? There are many different styles to choose from, and some can make removing dandelions a breeze.
A new video produced by UC IPM demonstrates a variety of long-handled and short-handled tools that will help you successfully remove the whole dandelion, taproot and all, to limit regrowth and further spread of the weed in your lawn or landscape.
Watch this and other videos on the UC IPM YouTube channel.
Psyllids are small insects that suck plant juices. Few of the over 140 native species of psyllids in California ever cause significant damage to plants. However, about 18 exotic species accidentally introduced from other countries can be pests on ornamentals or fruit trees. Some are often controlled by natural enemies; others occasionally require suppression with pesticides. Learn about biology, identification and management of psyllids in a revised UC IPM Pest Note: Psyllids authored by John Kabashima, UCCE Orange County; Tim Paine, UC Riverside; Kent Daane, UC Berkeley; and Steve Dreistadt, UC IPM Program. This publication features color photographs of all the...
- Author: Mary Louise Flint
Many retail nurseries and garden centers sell lady beetles for controlling aphids in gardens and landscapes. Gardeners often ask, “Does releasing lady beetles really work?”
University of California research has demonstrated that lady beetle releases can effectively control aphids in a limited landscape or garden area if properly handled and applied in sufficient numbers. However, because of inadequate release rates or poor quality, lady beetles often fail to provide satisfactory control; other low toxicity aphid management practices such as hosing off or insecticidal soap or oil sprays may be more effective. Here are some things to consider if you decide to try lady beetle releases:
- Author: Cheryl A. Wilen
[From the May 2013 issue of the UC IPM Green Bulletin newsletter]
For the last 30 years, the primary mollusk (snail and slug) baits used in the landscaping industry have been those containing metaldehyde as the active ingredient. About 10 years ago, iron phosphate came on the market and is now also widely used, particularly in areas where people and pets may encounter the molluscicide. Recently a new active ingredient, ferric sodium EDTA, has become available for both home use and professional pest management.
You can find this active ingredient in new formulations.../span>