Trinity County Cooperative Extension
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Trinity County Cooperative Extension

Bug Squad Blog

A Sign of the Times: Why This Black Walnut Tree Is Dying

Forest entomologists Steve Seybold (right) and Jackson Audley stand by a 150-year-old black walnut tree on the 100 block of E Street. It is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)

If you've ever walked into the courtyard on the 100 block of E Street in downtown Davis, Calif., you've probably noticed the massive black walnut tree near Sophia's Thai Bar and Kitchen. It's about 150 years old, measures about five feet in diameter,...

Forest entomologists Steve Seybold (right) and Jackson Audley stand by a 150-year-old black walnut tree on the 100 block of E Street. It is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)
Forest entomologists Steve Seybold (right) and Jackson Audley stand by a 150-year-old black walnut tree on the 100 block of E Street. It is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)

Forest entomologists Steve Seybold (right) and Jackson Audley stand by a 150-year-old black walnut tree on the 100 block of E Street. It is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)

Walnut twig beetles tunnel into branches and trunks of walnut (Juglans) where they create galleries for mating and reproduction. In association with a canker producing fungus, Tthey cause a disease known as thousand cankers disease. This tree is in downtown Davis, Calif. (Photo by Kathy Keatley Garvey)
Walnut twig beetles tunnel into branches and trunks of walnut (Juglans) where they create galleries for mating and reproduction. In association with a canker producing fungus, Tthey cause a disease known as thousand cankers disease. This tree is in downtown Davis, Calif. (Photo by Kathy Keatley Garvey)

Walnut twig beetles tunnel into branches and trunks of walnut (Juglans) where they create galleries for mating and reproduction. In association with a canker producing fungus, Tthey cause a disease known as thousand cankers disease. This tree is in downtown Davis, Calif. (Photo by Kathy Keatley Garvey)

This massive, 150-year-old black walnut tree on the 100 block of E Street, Davis, is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)
This massive, 150-year-old black walnut tree on the 100 block of E Street, Davis, is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)

This massive, 150-year-old black walnut tree on the 100 block of E Street, Davis, is dying of thousand cankers disease. (Photo by Kathy Keatley Garvey)

The Buzz About Bees: UC Davis Apiculturist in 'Science Friday' Program May 24

Extension apiculturist Elina Lastro Niño opens a hive at the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis. (Photo by Kathy Keatley Garvey)

"Bee" sure to tune in Science Friday, the National Public Radio program, tomorrow (May 24) at noon to hear the buzz about honey bees. Guests will be Extension apiculturist Elina Lastro Niño of the UC Davis Department of Entomology and...

Extension apiculturist Elina Lastro Niño opens a hive at the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis. (Photo by Kathy Keatley Garvey)
Extension apiculturist Elina Lastro Niño opens a hive at the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis. (Photo by Kathy Keatley Garvey)

Extension apiculturist Elina Lastro Niño opens a hive at the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis. (Photo by Kathy Keatley Garvey)

Professor Tom Seeley (right) of Cornell University chats with UC Davis Professor Neal Williams following Seeley's keynote address to the 2018 UC Davis Bee Symposium. (Photo by Kathy Keatley Garvey)
Professor Tom Seeley (right) of Cornell University chats with UC Davis Professor Neal Williams following Seeley's keynote address to the 2018 UC Davis Bee Symposium. (Photo by Kathy Keatley Garvey)

Professor Tom Seeley (right) of Cornell University chats with UC Davis Professor Neal Williams following Seeley's keynote address to the 2018 UC Davis Bee Symposium. (Photo by Kathy Keatley Garvey)

Hey, I'm Eating as Fast as I Can!

An immature lady beetle (larvae) chowing down on an oleander aphid. This photo was taken on a milkweed plant in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Have you ever seen the larva of a lady beetle (aka ladybug) dining on an aphid? Lights! Camera! Action! So here is this charming little immature lady beetle chowing down on an oleander aphid that has the audacity to infest the milkweed in our...

An immature lady beetle (larvae) chowing down on an oleander aphid. This photo was taken on a milkweed plant in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
An immature lady beetle (larvae) chowing down on an oleander aphid. This photo was taken on a milkweed plant in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

An immature lady beetle (larvae) chowing down on an oleander aphid. This photo was taken on a milkweed plant in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

A well-fed adult lady beetle (aka ladybug) ignores a fat Oleander aphid. (Photo by Kathy Keatley Garvey)
A well-fed adult lady beetle (aka ladybug) ignores a fat Oleander aphid. (Photo by Kathy Keatley Garvey)

A well-fed adult lady beetle (aka ladybug) ignores a fat Oleander aphid. (Photo by Kathy Keatley Garvey)

Posted on Wednesday, May 22, 2019 at 5:27 PM

This Bug's for You--And That One, Too!

UC Davis entomology student and Bohart associate Lohit Garikipati shows butterfly specimens to Olivia Bingen, 4, and her father, Steve Bingen of the UC Davis Department of Music. (Photo by Kathy Keatley Garvey)

This bug's for you. And this one, too. And that one over there! When UC Davis employees and their offspring visited the Bohart Museum of Entomology during the recent "Take Your Daughters and Sons to Work" Day, reactions ranged from awe to "wow!" They...

UC Davis entomology student and Bohart associate Lohit Garikipati shows butterfly specimens to Olivia Bingen, 4, and her father, Steve Bingen of the UC Davis Department of Music. (Photo by Kathy Keatley Garvey)
UC Davis entomology student and Bohart associate Lohit Garikipati shows butterfly specimens to Olivia Bingen, 4, and her father, Steve Bingen of the UC Davis Department of Music. (Photo by Kathy Keatley Garvey)

UC Davis entomology student and Bohart associate Lohit Garikipati shows butterfly specimens to Olivia Bingen, 4, and her father, Steve Bingen of the UC Davis Department of Music. (Photo by Kathy Keatley Garvey)

It tickles! Camilla Fuerte, 7,  reacts to a tarantula as her brother Joel Fuerte, 10, takes it all in stride. They are the children of Gabby Sanchez Fuerte of the Department of Materials Science and Engineering, College of Engineering. In the foreground is senior museum scientist Steve Heydon of the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)
It tickles! Camilla Fuerte, 7, reacts to a tarantula as her brother Joel Fuerte, 10, takes it all in stride. They are the children of Gabby Sanchez Fuerte of the Department of Materials Science and Engineering, College of Engineering. In the foreground is senior museum scientist Steve Heydon of the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

It tickles! Camilla Fuerte, 7, reacts to a tarantula as her brother Joel Fuerte, 10, takes it all in stride. They are the children of Gabby Sanchez Fuerte of the Department of Materials Science and Engineering, College of Engineering. In the foreground is senior museum scientist Steve Heydon of the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

Ilyssa Boco, first-year entomology student at UC Davis, shows stick insects to Camellia Aranda, 8, and her sister, Isabella, 4. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the Department of Political Science, and Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)
Ilyssa Boco, first-year entomology student at UC Davis, shows stick insects to Camellia Aranda, 8, and her sister, Isabella, 4. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the Department of Political Science, and Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)

Ilyssa Boco, first-year entomology student at UC Davis, shows stick insects to Camellia Aranda, 8, and her sister, Isabella, 4. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the Department of Political Science, and Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)

Ximena Aranda, 6, and her sister, Isabella, 3, check out the insect specimens at the Bohart Museum of Entomology. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the UC Davis Department of Political Science and the Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)
Ximena Aranda, 6, and her sister, Isabella, 3, check out the insect specimens at the Bohart Museum of Entomology. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the UC Davis Department of Political Science and the Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)

Ximena Aranda, 6, and her sister, Isabella, 3, check out the insect specimens at the Bohart Museum of Entomology. Their mother, Laura Aranda, works with the administrative Orange Cluster, which serves the UC Davis Department of Political Science and the Department of Communication and Linguistics. (Photo by Kathy Keatley Garvey)

Bohart associate and UC Davis graduate Emma Cluff shows tomato hornworms (Manduca quinquemaculata) to Isabella Aranda, 3, and her sister Ximena Aranda, 6. (Photo by Kathy Keatley Garvey)
Bohart associate and UC Davis graduate Emma Cluff shows tomato hornworms (Manduca quinquemaculata) to Isabella Aranda, 3, and her sister Ximena Aranda, 6. (Photo by Kathy Keatley Garvey)

Bohart associate and UC Davis graduate Emma Cluff shows tomato hornworms (Manduca quinquemaculata) to Isabella Aranda, 3, and her sister Ximena Aranda, 6. (Photo by Kathy Keatley Garvey)

Katie Eting, 6,  wearing a shirt,
Katie Eting, 6, wearing a shirt, "Girls Are Heroes" and her sister, Lily Eting, wearing "Every Day is Caturday," check out stick insects with their mother and UC Davis employee, Jennifer Eting (center) and Ilyssa Boco (far left), first-year entomology student. In back is Tabatha Yang, the Bohart Museum's education and outreach coordinator. (Photo by Kathy Keatley Garvey)

Katie Eting, 6, wearing a shirt, "Girls Are Heroes" and her sister, Lily Eting, wearing "Every Day is Caturday," check out stick insects with their mother and UC Davis employee, Jennifer Eting (center) and Ilyssa Boco (far left), first-year entomology student. In back is Tabatha Yang, the Bohart Museum's education and outreach coordinator. (Photo by Kathy Keatley Garvey)

McKenzie Kennedy, 8, granddaughter of UC Davis employee Sherly Blackshire, proudly holds a stick insect. (Photo by Kathy Keatley Garvey)
McKenzie Kennedy, 8, granddaughter of UC Davis employee Sherly Blackshire, proudly holds a stick insect. (Photo by Kathy Keatley Garvey)

McKenzie Kennedy, 8, granddaughter of UC Davis employee Sherly Blackshire, proudly holds a stick insect. (Photo by Kathy Keatley Garvey)

Katie Eting, 6, and her mother Jennifer Eting learn about the insect specimens at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)
Katie Eting, 6, and her mother Jennifer Eting learn about the insect specimens at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

Katie Eting, 6, and her mother Jennifer Eting learn about the insect specimens at the Bohart Museum of Entomology. (Photo by Kathy Keatley Garvey)

C. J. Babowal (center), 5, delights in seeing a stick insect on the arm of his brother, Roger Babowal, 9. At left is Katie Eting,6. The boys' mother, Crystal Babowal, works in UC Davis Continuing Education. Katie's mother, Jennifer Eting, works in Finance Operations and Administration. (Photo by Kathy Keatley Garvey)
C. J. Babowal (center), 5, delights in seeing a stick insect on the arm of his brother, Roger Babowal, 9. At left is Katie Eting,6. The boys' mother, Crystal Babowal, works in UC Davis Continuing Education. Katie's mother, Jennifer Eting, works in Finance Operations and Administration. (Photo by Kathy Keatley Garvey)

C. J. Babowal (center), 5, delights in seeing a stick insect on the arm of his brother, Roger Babowal, 9. At left is Katie Eting,6. The boys' mother, Crystal Babowal, works in UC Davis Continuing Education. Katie's mother, Jennifer Eting, works in Finance Operations and Administration. (Photo by Kathy Keatley Garvey)

Camellia Aranda (foreground) likes a Madagascar hissing cockroach. In the background, Julianna “Ju Ju” Smith, 4, isn't so sure, as she hides behind the  her father, Justin Smith of Animal Science. (Photo by Kathy Keatley Garvey)
Camellia Aranda (foreground) likes a Madagascar hissing cockroach. In the background, Julianna “Ju Ju” Smith, 4, isn't so sure, as she hides behind the her father, Justin Smith of Animal Science. (Photo by Kathy Keatley Garvey)

Camellia Aranda (foreground) likes a Madagascar hissing cockroach. In the background, Julianna “Ju Ju” Smith, 4, isn't so sure, as she hides behind the her father, Justin Smith of Animal Science. (Photo by Kathy Keatley Garvey)

Simon Dvorak, who works with UC Davis Academic Technology Services, visited the Bohart Museum of Entomology with his son Max, 7. (Photo by Kathy Keatley Garvey)
Simon Dvorak, who works with UC Davis Academic Technology Services, visited the Bohart Museum of Entomology with his son Max, 7. (Photo by Kathy Keatley Garvey)

Simon Dvorak, who works with UC Davis Academic Technology Services, visited the Bohart Museum of Entomology with his son Max, 7. (Photo by Kathy Keatley Garvey)

Hear That Buzz? It's World Bee Day!

Beekeeper Adelaide Grandia smiles through a pollinator cut-out board.  Her grandfather is teaching her beekeeping. (Photo by Kathy Keatley Garvey)

Hear that buzz? Today is World Bee Day! We celebrate honey bees every day, but they are especially celebrated on May 20, World Bee Day. It's an annual day to raise awareness about the importance of bees and beekeeping. It's a day to acknowledge the...

Beekeeper Adelaide Grandia smiles through a pollinator cut-out board.  Her grandfather is teaching her beekeeping. (Photo by Kathy Keatley Garvey)
Beekeeper Adelaide Grandia smiles through a pollinator cut-out board. Her grandfather is teaching her beekeeping. (Photo by Kathy Keatley Garvey)

Beekeeper Adelaide Grandia smiles through a pollinator cut-out board. Her grandfather is teaching her beekeeping. (Photo by Kathy Keatley Garvey)

Adelaide Grandia and her grandfather, Dwight Grandia of Gulf Shores, Ala., confer on a bee vacuum device. He is teaching her how to keep bees and recently set up a hive for her. (Photo by Kathy Keatley Garvey)
Adelaide Grandia and her grandfather, Dwight Grandia of Gulf Shores, Ala., confer on a bee vacuum device. He is teaching her how to keep bees and recently set up a hive for her. (Photo by Kathy Keatley Garvey)

Adelaide Grandia and her grandfather, Dwight Grandia of Gulf Shores, Ala., confer on a bee vacuum device. He is teaching her how to keep bees and recently set up a hive for her. (Photo by Kathy Keatley Garvey)

Ariel Cormier, who works in the chancellor and provost offices as manager of Budget and Financial Analyis, guides her twin daughters Casey and Gabrielle, 8, in the Häagen-Dazs Honey Bee Haven. The garden, located on Bee Biology Road, was installed in the fall of 2009. (Photo by Kathy Keatley Garvey)
Ariel Cormier, who works in the chancellor and provost offices as manager of Budget and Financial Analyis, guides her twin daughters Casey and Gabrielle, 8, in the Häagen-Dazs Honey Bee Haven. The garden, located on Bee Biology Road, was installed in the fall of 2009. (Photo by Kathy Keatley Garvey)

Ariel Cormier, who works in the chancellor and provost offices as manager of Budget and Financial Analyis, guides her twin daughters Casey and Gabrielle, 8, in the Häagen-Dazs Honey Bee Haven. The garden, located on Bee Biology Road, was installed in the fall of 2009. (Photo by Kathy Keatley Garvey)

Ariel Cormier shows her daughter, Gabrielle, how to use the bee vacuum device, a catch-and-release activity. At right is daughter Casey. The 8-year-old girls are twins. (Photo by Kathy Keatley Garvey)
Ariel Cormier shows her daughter, Gabrielle, how to use the bee vacuum device, a catch-and-release activity. At right is daughter Casey. The 8-year-old girls are twins. (Photo by Kathy Keatley Garvey)

Ariel Cormier shows her daughter, Gabrielle, how to use the bee vacuum device, a catch-and-release activity. At right is daughter Casey. The 8-year-old girls are twins. (Photo by Kathy Keatley Garvey)

Ariel Cormier with eight-year-old twin daughters Casey (left) and Gabrielle at the Miss Bee Haven sculpture. It's a six-foot-long mosaic and ceramic sculpture of a worker bee. (Photo by Kathy Keatley Garvey)
Ariel Cormier with eight-year-old twin daughters Casey (left) and Gabrielle at the Miss Bee Haven sculpture. It's a six-foot-long mosaic and ceramic sculpture of a worker bee. (Photo by Kathy Keatley Garvey)

Ariel Cormier with eight-year-old twin daughters Casey (left) and Gabrielle at the Miss Bee Haven sculpture. It's a six-foot-long mosaic and ceramic sculpture of a worker bee. (Photo by Kathy Keatley Garvey)

UC Davis employee David Hernandez (left) with sons Aayden, 10 (center) and Evan, 8, pose behind the pollinator cut-out board. (Photo by Kathy Keatley Garvey)
UC Davis employee David Hernandez (left) with sons Aayden, 10 (center) and Evan, 8, pose behind the pollinator cut-out board. (Photo by Kathy Keatley Garvey)

UC Davis employee David Hernandez (left) with sons Aayden, 10 (center) and Evan, 8, pose behind the pollinator cut-out board. (Photo by Kathy Keatley Garvey)

UC Davis employee Chunying Xu with her son, Andy, look for bees in the bee garden. (Photo by Kathy Keatley Garvey)
UC Davis employee Chunying Xu with her son, Andy, look for bees in the bee garden. (Photo by Kathy Keatley Garvey)

UC Davis employee Chunying Xu with her son, Andy, look for bees in the bee garden. (Photo by Kathy Keatley Garvey)

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