Pest Management & Plant Health

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The gold-winning video "Diagnosing Herbicide Injury" includes several interactive features to make it more engaging and entertaining, and to help viewers remember the information.
UC Weed Science (weed control, management, ecology, and minutia): Article

Video based on Al-Khatib, Hanson course wins Gold Award

August 7, 2022
By Gale Perez
A cartoon character that looks suspiciously like a Department of Plant Sciences professor leads an animated, online tutorial that recently won a 2022 Gold Award from the Association for Communication Excellence.
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Figure 1. Ligule and auricle on a rice plant. Watergrass species do not have ligules and auricles.
UC Weed Science (weed control, management, ecology, and minutia): Article

Weedy Rice Scouting and Reporting 2022

August 4, 2022
By Whitney B Brim-Deforest
It is getting close to the time we need to scout for weedy rice. Our team will be scouting known infested fields that are planted to rice this year. Troy Clark, our Rice Junior Specialist, will be starting in the next few weeks, and will be reaching out to growers and PCA's.
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Wide angle shot of a western spotted cucumber beetle, Diabrotica undecimpunctata, chewing a hole in a petal of a Mexican sunflower, Tithonia rotundifola. (Photo by Kathy Keatley Garvey)
Bug Squad: Article

Spotted Cucumber Beetles: They Know How to Hit the Spot

August 4, 2022
By Kathy Keatley Garvey
Western spotted cucumber beetles know how to hit the spot. Make that "multiple spots." These beetles, Diabrotica undecimpunctata, are agricultural pests that feed on roots, seedlings, flowers and foliage. And they can transmit diseases.
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Clusters of dark spots on a satellite image of a green pasture indicate an infestation of an undesired plant. The clusters are most dense on the west side of the pasture.
UC Weed Science (weed control, management, ecology, and minutia): Article

A different perspective on weeds

August 1, 2022
Several months ago, I got a question about weeds in an irrigated pasture. The mystery plants were slowly but surely taking over a significant proportion of the pasture, and the owner asked me to visit the property to identify the plants and options to control them.
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The larvae of the Greater Wax Moth (Galleria mellonella) inside a bee hive. The black dotes are small hive beetles. (Photo by Kathy Keatley Garvey)
Bug Squad: Article

National Moth Week: Here's One Moth that Beekeepers Won't Celebrate

July 29, 2022
By Kathy Keatley Garvey
During the 11th annual National Moth Week, one thing's for sure: Beekeepers won't be celebrating the beauty, life cycle, or habitat of the Greater Wax Moth (Galleria mellonella), also known as "the honeycomb moth." It's a major pest of bee colonies that aren't maintained well.
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Thinning canopy is an early sign of Bot canker. [Credit: J. Downer]
Pests in the Urban Landscape: Article

Bot Canker: Have You Heard of It?

July 28, 2022
By Karey Windbiel-Rojas
Ever heard of Bot canker? "Bot" stands for Botryosphaeria which is a plant disease that results in cankers of trees and other woody plants. This fungal disease can be worse under drought conditions when trees are stressed.
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Leaves of a river red gum eucalyptus tree covered with redgum lerp psyllids. The white growths are the “lerp” produced by the immature (nymph) stage of the insect. [Credit: Jack Kelly Clark]
Pests in the Urban Landscape: Article

Redgum Lerp Psyllid Resource Updated

July 25, 2022
By Karey Windbiel-Rojas
If you have eucalyptus trees, you might have noticed white, crusty growth on the leaves. Or maybe you saw a sticky, blackened mess of fallen leaves under a eucalyptus tree. These are signs of the redgum lerp psyllid, one of the most common psyllid pests that damages eucalyptus trees in California.
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Figure 1. Figure 1. Distribution of Echinochloa spp. samples collected in August and September 2020 from California rice fields. ID = identification
UC Weed Science (weed control, management, ecology, and minutia): Article

Herbicide Susceptibility Survey of Watergrass (Echinochloa spp.) in California Rice

July 24, 2022
By Whitney B Brim-Deforest, Troy L Clark, Taiyu Guan
From the CAPCA Adviser magazine :: June 2022 Whitney Brim-DeForest is a UCCE Rice and Wild Rice Advisor for Sutter, Yuba, Sacramento, and Placer Counties; Taiyu Guan is an Assistant Specialist in UCCE Sutter-Yuba Counties; Troy Clark is a Rice Junior Specialist for UCCE Butte County.
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