January/February 2024 - 12

PEST UPDATE
This image shows an almond
with a tunnel caused by
carpophilus feeding. Photo
by Houston Wilson, Dept.
Entomology, UC Riverside.
Crop sanitation is the key to
controlling this new beetle pest
BY DEBBIE EISELE
EDITORIAL DIRECTOR
T
ree nut crops in California
are faced with a new threat.
The pest is called Carpophilus
beetle (Nitidulidae: Carpophilus
truncatus). Houston Wilson, associate
cooperative Extension specialist at
the UC Riverside Department of
Entomology, provided National Nut
Grower some important details about
this pest.
" Carpophilus beetle has been a key
pest of almonds in Australia for about
10 years. More recent reports have
found it on walnuts in Argentina and
Italy, so it appears to be spreading, "
Wilson said. " So far, in California, we
have found it on both almonds and
pistachios in multiple counties across
the San Joaquin Valley. "
If the beetle is present in an
orchard, Wilson said that growers
may observe a " fine powdery frass
on infested nuts " and added that
" feeding activity from adults and/or
larvae can also sometimes result in
oval-shaped tunnels in the kernel. "
Tree nut growers can obtain
more information on Carpophilus
truncatus and remain updated on the
latest observations in several ways.
" I'm working with my UC
Cooperative Extension (UCCE)
colleagues, as well as growers and pest
control advisors (PCAs), to conduct a
All almond, pistachio and walnut growers must remain
vigilant for this new threat. If you suspect that you
have this beetle in your orchard, please contact your
local UCCE farm advisor (ucanr.edu/About/Locations),
County Agricultural Commissioner (cacasa.org/county)
and/or the CDFA Pest Hotline www.cdfa.ca.gov/plant/
reportapest) at 1-800-491-1899.
12 JANUARY/FEBRUARY 2024
broader regional survey across the San
Joaquin Valley, and we'll be posting
the findings online and in upcoming
presentations as new data come
in, " Wilson said. So far, confirmed
populations of Carpophilus beetle have
been in Stanislaus, Merced, Madera and
Kings counties, which suggests the pest
is already fairly widespread, he said.
Crop sanitation is key to controlling
the beetle. " Like navel orangeworm,
this new Carpophilus beetle also
overwinters in remnant mummy
nuts, and so winter sanitation is
fundamental to controlling it, "
Wilson said " We cannot emphasize
this enough, especially after the high
levels of navel orangeworm damage
we saw this year: timely and effective
sanitation should not be a choice this
year, it is an imperative. "
Wilson shared that both he and
David Haviland, a UCCE Kern
County farm advisor, are working
with Australian colleagues to obtain
resources and information that
can assist California growers with
Carpophilus truncatus infestations.
He noted that Australia's decade of
experience with the pest will provide
" a lot of good information, which will
hopefully allow us to quickly get up to
speed on best management practices to
control Carpophilus truncatus. "
http://www.ucanr.edu/About/Locations http://www.cacasa.org/county http://www.cdfa.ca.gov/plant/

January/February 2024

Table of Contents for the Digital Edition of January/February 2024

Editor's Letter
Precision pollination
Sustainable innovations
Pest Management
Data and novel technologies
A trusted name
Business
Company Spotlights
Industry Events
Ad Index
January/February 2024 - 1
January/February 2024 - 2
January/February 2024 - 3
January/February 2024 - Editor's Letter
January/February 2024 - 5
January/February 2024 - Precision pollination
January/February 2024 - 7
January/February 2024 - 8
January/February 2024 - 9
January/February 2024 - Sustainable innovations
January/February 2024 - 11
January/February 2024 - Pest Management
January/February 2024 - 13
January/February 2024 - Data and novel technologies
January/February 2024 - 15
January/February 2024 - 16
January/February 2024 - 17
January/February 2024 - A trusted name
January/February 2024 - 19
January/February 2024 - 20
January/February 2024 - 21
January/February 2024 - Business
January/February 2024 - 23
January/February 2024 - Company Spotlights
January/February 2024 - Industry Events
January/February 2024 - Ad Index
January/February 2024 - 27
January/February 2024 - 28
https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2024
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2024
https://www.nxtbook.com/greatamericanmediaservices/NNG/november-december-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/september-october-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/july-august-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/may-june-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2023
https://www.nxtbook.com/greatamericanmediaservices/NNG/november-december-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/september-october-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/july-august-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/may-june-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/march-april-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/january-february-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/winter-2022
https://www.nxtbook.com/greatamericanmediaservices/NNG/fall-2021
https://www.nxtbook.com/greatamericanmediaservices/NNG/summer-2021
https://www.nxtbook.com/greatamericanmediaservices/NNG/winter-2021
https://www.nxtbookmedia.com