UCCE Master Gardeners of Sacramento County
University of California
UCCE Master Gardeners of Sacramento County

UC Gardening Blogs

Farewell Ken

 

 

MG Ken Williams leaving for Florida

He trained almost all MG's

We will surely miss you

 

ken williams 2021 bougainvillea
ken williams 2021 bougainvillea

Posted on Wednesday, August 11, 2021 at 9:25 AM

Humble to be a Bumble

I was aghast when my neighbor walked up to me and asked, "how do I get rid of the bumble bees around my house? They might be carpenter bees and I have to get rid of them." So, it got me thinking, maybe I should do a blog about carpenter bees and bumblebees.

Carpenter bees

The carpenter bee is mostly a solitary bee and doesn't live in a colony. Sometimes they a have small family living in the nest. Only the females drill out holes in wood to create the nest. Once the nest is built the female will lay her eggs, each in a separate chamber, and then pack them full of nectar. Carpenter bees live up to three years, which is a long life for such big bees. The young daughters often live in the nest with their mothers. The mated female and the male will die in their nest.

Carpenter bees only seek out wood that is untreated, especially redwood, cedar, pine, and cypress. They prefer wood that is weathered and not rotting. They do not eat the wood. If you do have a problem with the drilling at your house or favorite chair, try these solutions. Paint or stain your wood. Try playing loud music, they don't like the vibrations. Carpenter bees are useful and beneficial, they are nature's recyclers.

They are very territorial but their defensive buzzing is more for show. These gentle giants very rarely sting. The male carpenter bee is the defender of the nest and doesn't have a stinger. Female bees can sting but only if provoked while protecting their nest.

The female California carpenter bees have little to no hair on their lower abdomen and it looks shiny. These female carpenter bees have all black or black with metallic blue lower abdomens. While the male bees can be fuzzy and yellow, aka the “teddy bear” or only have yellow markings, on the lower parts of their face and top of their thorax.

They have an interesting way of getting pollen from the flower's anthers. Carpenter bees use sonic vibrations to fragment the cells of dry pollen. This type of pollen gathering is called “buzz pollination”. When it comes to nectar, they have a unique way of foraging it from flowers they can't fit into.  They cut a slit at the base of the corolla (all the petals of a flower) and retrieve the nectar without ever pollinating the flower. But there are lots of flowers that are large enough for them to fly into to get nectar. The flowers that carpenter bees like are California poppies, Palo Verde, California Lilac, California Flannel bush, Redbud, and Sage.

Bumblebees

The bumblebee has soft, fuzzy hairs all over their bodies. They are mostly plump and stout-bodied. They have a proboscis, which is a tongue-like apparatus and used to gather pollen and nectar.

There are approx. 40 species of Bumblebees (Bombus) in the U.S. There are approx. 250 species of Bombus in the world and 16 subgenera.

Some bumblebee species have evolved longer faces and tongues to extract nectar from flowers with long corollas. They are a vital pollinator of native flowers in our natural ecosystem. Bumblebees inhabit temperate regions worldwide. They are the dominant pollinators in northern climates. They are important in boreal forests, prairies, coastal plains, and mountain areas. They have the ability to survive in cold climates, which makes them important pollinators of alpine flowers.

Different species live in various microhabitats. The diversity of bumblebees can be found in along stream beds, burned or fallen logs, and a variety of flowers. Each different microhabitat provides a different resource and a greater chance to see a new species of bumblebee. Most bumble bee nests are found underground in abandoned rodent burrows, holes in building foundations, and stacks of firewood. Some species have over 1,000 bees in the nest, while other species rarely have over 50 bees.

Bumblebees are crucial to pollinating wildflowers and very effective at pollinating plants in the Solanaceae family. Even though many of the nightshade plants (eggplants, peppers, and tomatoes) are self-pollinating, the bumblebees help release pollen from within the flower. They also pollinate a variety of our fruits and vegetables such as apples, apricots, blueberries, melons, squash, raspberries, and onions. 

Be humble to the big bees, they are adorable and essential to our ecological system. 

Posted on Wednesday, August 11, 2021 at 1:00 AM

All Systems 'Go' for the International Olfaction/Taste Symposium

All systems are "go" for a first-of-its-kind  international olfaction/taste symposium...

UC Davis distinguished professor Walter Leal (far right) preparing for the chat session of the international symposium on olfaction and taste. Assisting him are students Efrain Vasquez (foreground) and Kelly Brandt.
UC Davis distinguished professor Walter Leal (far right) preparing for the chat session of the international symposium on olfaction and taste. Assisting him are students Efrain Vasquez (foreground) and Kelly Brandt.

UC Davis distinguished professor Walter Leal (far right) preparing for the chat session of the international symposium on olfaction and taste. Assisting him are students Efrain Vasquez (foreground) and Kelly Brandt.

Posted on Tuesday, August 10, 2021 at 3:23 PM

Some Thoughts about Using Insecticides

While thinking about ideas for this blog, I happened upon an advertisement for a well-known “big box” store.  On the front were listings of “needed” garden products: namely a known brand of insecticide NEEDED for keeping the yard and garden safe from insects (180 varieties!) that are chewing their way through gardens and yards with great glee!

I got to thinking of my knowledge of insects and discovered that I could not even name that many!  Yes, aphids and thrips are on my radar, BUT 180 different varieties (?), no way.  To be perfectly honest, without insects, there would be no fruits, vegetables, or flowers – THEY are the reason we have food to eat and beautiful flowers to look at.  Sorry, but a garden without “bugs” would be a sad-looking picture of green for the 1st year, and then nothing the 2nd year, especially for annuals.

People often want to plant a butterfly garden, and then complain about the caterpillars eating the plants:  “They are eating the plants I put out for the butterflies!”  Well, the caterpillars are the butterflies to come; these folks will stop complaining when those little munchers will disappear and reappear as the butterflies they wanted in the yard, flitting among the flowers, and stopping here and there to rest or sip nectar from the blooms for a snack.

Yes, there are times when some management of insects is needed, mainly on food plants or roses (how the aphids and thrips love them). For caterpillars munching their way through the veggie patch, a product like Bt (Bacillus thuringiensis) is just the thing to stop those mighty jaws in mid-bite.  If you have chickens, or your neighbors do, pick off the little munchers (or big in the case of tomato worms) and give those chickens a real protein snack, or otherwise toss them into a can of soapy water until they drown and then toss into garbage.

For other insects, sticky traps placed near plants can get rid of pests; blowing off aphids with a strong stream of water will do the trick, or running your fingers down the stem and squishing them works too.  Soapy water is another cheap trick to get rid of insects – just spray it on.

Please do not use an indiscriminate spray – not only will you kill off the “bad” guys, but the “good” guys as well.  Remember that pollinators like the bees are having enough problems as it is – do not add to them!

Fritillary caterpillar. photo by Sharon Rico
Fritillary caterpillar. photo by Sharon Rico

Posted on Tuesday, August 10, 2021 at 10:21 AM

To Be an Underwing Underfoot

You can be an understudy or you can be an underwing. Or underfoot. Have you ever seen...

An underwing moth,  maybe a Catocala amatrix, with tattered wings. (Photo by Kathy Keatley Garvey)
An underwing moth, maybe a Catocala amatrix, with tattered wings. (Photo by Kathy Keatley Garvey)

An underwing moth, maybe a Catocala amatrix, with tattered wings. (Photo by Kathy Keatley Garvey)

Posted on Monday, August 9, 2021 at 4:29 PM

Read more

 
E-mail
 

4145 Branch Center Road, Sacramento, CA 95827       Master Gardener Phone:  916.876.5338       Fax:  916.875.6233

Webmaster Email: mgsacramento@ucanr.edu