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UC Agriculture & Natural Resources News

The science of DRAAWP on display

Logo of the Aquatic Plant Management Society

The Delta Region Areawide Aquatic Weed Program has been focusing science and the application of science onto the management of invasive aquatic weeds such as water hyacinth, Brazilian egeria, and water primrose in the Delta. As part of the conclusion of the DRAAWP, a special session has been...

Logo of the Aquatic Plant Management Society
Logo of the Aquatic Plant Management Society

Logo of the Aquatic Plant Management Society

Posted on Tuesday, June 18, 2019 at 1:11 PM
Tags: aquatic (43), aquatic weeds (51)

Spring Fever 2019

Figure 1. Cabernet Sauvignon in SLO County with magnesium deficiency symptoms.

Numerous vineyards throughout this region and elsewhere in California have displayed unusual leaf symptoms this spring, consisting of yellowing and/or bronzing of the leaf blades along with necrotic margins in some cases or even necrotic interveinal areas. The affected leaves are always the most...

Posted on Tuesday, June 18, 2019 at 2:00 AM

In Praise of Bumble Bees

A yellow-faced bumble bee,Bombus vosnesenskii, foraging on a tower of jewels, Echium wildpretii, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

When was the last time you sighted a bumble bee? Photographed it? It's National Pollinator Week and one of our favorite bumble bees is the yellow-faced bumble bee, Bombus vosnesenskii. It was also a favorite of internationally renowned bee expert Robbin Thorp, distinguished emeritus professor of...

A yellow-faced bumble bee,Bombus vosnesenskii, foraging on a tower of jewels, Echium wildpretii, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
A yellow-faced bumble bee,Bombus vosnesenskii, foraging on a tower of jewels, Echium wildpretii, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A yellow-faced bumble bee,Bombus vosnesenskii, foraging on a tower of jewels, Echium wildpretii, in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A yellow-faced bumble bee, Bombus vosnesenskii, leaving a foxglove in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
A yellow-faced bumble bee, Bombus vosnesenskii, leaving a foxglove in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A yellow-faced bumble bee, Bombus vosnesenskii, leaving a foxglove in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

The California's 2019 wildfire season takes off

As California grappled with a record-breaking heatwave last week and 236 wildfires, officials are bracing for the worst, reported Maanvi Singh in the Guardian.

The fires have been mostly fueled by grass and brush that came up during the state's especially wet winter and mild spring, according to a CAL FIRE official. UC Cooperative Extension fire advisor Lenya Quinn-Davidson said California's annual wildfire season is growing longer – beginning earlier in the spring and stretching later in the fall.

“It's not unusual for us to see this many small fires in June,” she said. “But 50 years ago, so many fires this early on – plus these extreme, high temperatures in June – would have been abnormal.”

It is difficult to predict how bad the rest of this fire season will be based on the number of fires so far, said UCLA climate scientist Daniel Swain.

"Our worst fire years aren't necessarily the years that we've had the highest number of fires,” he noted. “All it takes is one – one huge, destructive fire to ruin the whole year."

Lenya Quinn-Davidson, center, is the UC Cooperative Extension fire scientist serving Humboldt, Siskiyou, Trinity and Mendocino counties. She is pictured with Jeanne Pincha-Tulley, left, and Kelly Martin, right, at a Women-in-Fire Prescribed Fire Training Exchange session.
Posted on Monday, June 17, 2019 at 9:36 AM
Tags: Lenya Quinn-Davidson (16), wildfire (151)
Focus Area Tags: Environment

Let's Celebrate National Pollinator Week

A ceramic/mosaic sculpture,

Did you know that next week is National Pollinator Week? It is. June 17-21 is the week set aside to celebrate pollinators and how we can protect them. Actually, National Pollinator Week should be every day. Launched 12 years ago under U.S. Senate approval,  National Pollinator Week zeroes...

A ceramic/mosaic sculpture,
A ceramic/mosaic sculpture, "Miss Bee Haven," anchors the Häagen-Dazs Honey Bee Haven on Bee Biology Road, UC Davis. It is the work of self-described rock artist Donna Billick of Davis. (Photo by Kathy Keatley Garvey)

A ceramic/mosaic sculpture, "Miss Bee Haven," anchors the Häagen-Dazs Honey Bee Haven on Bee Biology Road, UC Davis. It is the work of self-described rock artist Donna Billick of Davis. (Photo by Kathy Keatley Garvey)

Visitors to the Häagen-Dazs Honey Bee Haven can learn what to plant to attract pollinators. (Photo by Kathy Keatley Garvey)
Visitors to the Häagen-Dazs Honey Bee Haven can learn what to plant to attract pollinators. (Photo by Kathy Keatley Garvey)

Visitors to the Häagen-Dazs Honey Bee Haven can learn what to plant to attract pollinators. (Photo by Kathy Keatley Garvey)

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