- Author: Lauren Fordyce
You've likely come across a bee, wasp, or hornet this summer. While these insects can cause painful stings, and allergic reactions for some, they are not usually aggressive. In the landscape, they can be beneficial by providing pollination to plants and, for some, preying on pest insects. And luckily for Californians, there is no need to fear the Asian giant hornet (now officially renamed to northern giant hornet), also known as the “murder hornet”, since this insect has not yet been found in the state.
While sometimes beneficial, these insects can also create nests in unfavorable locations and become a nuisance around picnics and...
- Author: Elaine Lander
The last weeks of summer are here and many are maximizing time outdoors, whether in yards, parks, or natural areas. As you enjoy the sunshine and perhaps a picnic, it is possible you may encounter different types of stinging insects such as bees and wasps.
Here are some resources that can help you avoid getting stung.
- Author: Dong-Hwan Choe
- Author: Kathleen Campbell
- Author: Michael K Rust
- Posted by: Elaine Lander
Many parks, recreational areas, and outdoor venues in California are home to yellowjacket wasps (Vespula spp.). Yellowjackets are commonly attracted to human food items, creating a serious nuisance and a potential stinging threat. If found, nests (usually underground) can be effectively treated with targeted insecticide applications (e.g., dusts containing pyrethroids). However, baiting could be a feasible alternative method to suppress yellowjackets over a wide area, especially if nests cannot be located. Currently, only one active ingredient (esfenvalerate) is registered for use within bait in California to control yellowjackets,...
The red imported fire ant, or RIFA for short, is no ordinary red ant. This invasive pest lives up to its name, delivering a sting that causes a burning sensation when its venom is injected into the skin.
People sometimes confuse RIFA with the native southern fire ant. Both can become very agitated when their nest is disturbed but RIFA are more likely to attack. RIFA can bite and sting its victim repeatedly, and its sting is more serious, causing a burning and itching sensation. This is followed by the formation of a white pustule, which can take several weeks to disappear. If not kept clean, the pustules can become infected and may leave permanent scarring. A small...
