Gardening in north Orange County, California

Sunday, November 18, 2012

Spider eating a bee


My husband took this photo of a female green lynx spider (Peucetia viridans) eating a bee. He used the camera flash, which is why it is so dark in the background, although it was day at the time.

Wednesday, October 3, 2012

Black widow spider


We caught this in the house this morning. I had brought in some stonecrop that I haven't potted yet, and the spider had apparently been hiding inside it. It is the western black widow spider (Latrodectus hesperus), native to California and famous for its venomous bite.  This is a female; the males are brown and much smaller, in fact hardly resembling this at all.

It was a bit difficult to get a good photo, as the camera wanted to focus on the glass of the jam jar, not on the spider, but the top photo is what you would ordinarily see, and the bottom photo is of course the distinctive red-orange "hour glass" shape on its abdomen. 

More on black and brown widows from the UC Integrated Pest Management program and the Hastings Natural History Reservation.

Sunday, September 30, 2012

Clouds and pine


The sky through the branches of our newly-trimmed pine in the back yard.

Saturday, September 29, 2012

Mealybug destroyer larva?



This is probably the larva of a mealybug destroyer, a beneficial insect introduced into California in 1891, and a little later into Florida as well, to help control the mealybugs harmful to citrus trees.  This one was crawling along the trunk of our lime tree; it is head-down in both photographs.  Cryptolaemus montrouzieri is native to Australia, and is a beneficial predator in both the larval and adult stages.  It does not often survive cold winters, and has to be reintroduced annually.

This one looks a little different from other mealybug destroyer larvae in photographs, especially this one at What's That Bug?, because I thought ours looked white all over, where the others look more like a dark roly-poly with weird white tentacles stuck all over it, like some insectal Halloween costume.

The Bugman finds it interesting that the mealybug destroyer larva looks very like the mealybug it preys on.  Mother Nature News has an article on how to tell "good" bugs from "bad" ones, including the mealybug destroyer larva and the mealybug.

It may also be a Scymnus larva, a ladybeetle; this is a beneficial insect as well.  Apparently the two are both members of the ladybeetle family anyway.  The Scymnus larva does not look at all like the more common ladybeetle larvae, which do not have the white "tentacles".  Of the Scymnus, the University of Florida writes with feeling, "Many owners of plants have sprayed the larvae with chemicals in the mistaken belief that they are pests. This misidentification must be overcome by education."  In the interests of such, here are a few pictures from other sources:

Mealybug (this one is Phenacoccus solani). Source: Wikipedia.

Mealybug destroyer in larval and adult stages, with mealybugs for comparison. Source: Cornell University.

A beneficial ladybeetle (Scymnus) larva. Source: UTIA.