March 2022 - 5

FruitGrowersNews.com
Office 616-887-9008
Editorial
Editor
GARY PULLANO | 616-520-2144
fgnedit@fruitgrowersnews.com
Assistant Editor
DOUG OHLEMEIER | 616-520-2162
dohlemeier@greatamericanpublish.com
Western Editor
CRYSTAL NAY | 616-520-2151
cnay@greatamericanpublish.com
Digital Content Strategist
ANA OLVERA | 616-520-2171
aolvera@greatamericanpublish.com
Advertising Sales
Associate Publisher
GREG SEBEL | 616-520-2146
fgnads@fruitgrowersnews.com
Client Success Representative
KIM MEYERS | 616-520-2137
kmeyers@greatamericanpublish.com
Vice President/Group Publisher
GERRY BOGDON | 616-520-2150
gbogdon@greatamericanpublish.com
Production
Senior Graphic Designer
ERIC HADDEN | 616-520-2147
fgnproduction@fruitgrowersnews.com
Creative Director
KRISTINA HOWELL | 616-520-2168
khowell@greatamericanpublish.com
Circulation
Audience Development
BECKY STOVALL | 616-520-2138
circulation@fruitgrowersnews.com
Corporate
Chief Financial Officer
DEB CARNES | 616-520-2169
dcarnes@greatamericanpublish.com
COO & Chief Marketing Officer
KIMBERLY BAKER | 616-520-2135
kbaker@greatamericanpublish.com
CEO
MATT McCALLUM | 616-520-2133
mmccallum@greatamericanpublish.com
Editorial Advisory Board
Mike Biltonen
John Clark
Rob Crassweller
Wanda Heuser Gale
Frank Gasperini
Simon Huntley
Mark Longstroth
Nathan Nourse
Gregory Peck
Roger Pepperl
Mark Seetin
USPS 576-420, ISSN 1533-6840
PERIODICAL POSTAGE PAID AT SPARTA, MI AND
ADDITIONAL OFFICE
Published monthly by Great American Media Services Inc.
Office at 75 Applewood Dr., Suite A, Sparta, Michigan 49345.
POSTMASTER
Send address changes to:
Great American Publishing,
PO Box 318, Lincolnshire IL 60069
SUBSCRIPTION RATES
United States: $35.50 per 3 years,
$15.50 per year
Canada: $56 per year,
Foreign Countries: $100 per year
Digital Editions: $9.95 per year,
Back Issues: $6 each
The opinions and views expressed by authors, contributors and
advertisers in Fruit Growers News do not necessarily reflect those
of the editors and publisher. Appearance in Fruit Growers News
does not constitute endorsement by Great American Media Services
or Fruit Growers News of the advertiser, its products, or services.
Great American Media Services and Fruit Growers News accepts no
responsibility of liability for the validity or accuracy of information
supplied by contributors, vendors, advertisers, or advertising agencies.
Great American Media Services and Fruit Growers News do not make
any claims or guarantees as to the accuracy or validity of information
supplied by contributors, vendors, advertisers or advertising agencies.
Copyright 2022
Fruit Growers News is a publication of
M
aximizing science and
minimizing guesswork
could be the winning
formula to control codling moth in
apples and pears.
Localized degree-day and trapcatch
information can help fruit
producers make more informed
decisions, reduce crop production
risk, and improve control of
codling moth and other pests.
While the 2020 and 2021
growing seasons were similarly
warm, the frequency of fruit
load rejections for Pennsylvania
producers differed starkly
between the two years.
" In 2020, Pennsylvania fruit
processors rejected almost as
many fruit loads as they did in
2005 and 2007, and those were
both considered disaster years.
Fortunately, in 2021, the numbers
of rejected loads were much
lower than in 2020, " says Greg
Krawczyk, Penn State University
tree fruit entomologist.
In southern Pennsylvania,
codling moth flights normally start
at the beginning of May with two
generations expected per season.
In comparison, Oriental fruit moth
flights often start three to four
weeks earlier.
" Adult codling moth are active
when the temperature is above
62, " says Krawczyk. " Codling
moth, when it is flying, responds
to the temperature. If it is cool,
they are not flying and may not
be observed in sex pheromone
traps. "
No matter the year, effective
codling moth control requires
correct timing and adequate
coverage with effective
insecticides before pests
enter fruit.
" After egg hatch, the larvae can
be inside the fruit in less than 24
hours, " says Krawczyk.
Seasonal management of
codling moth, as recommended
by Extension entomologists,
generally includes two to three
Data Key to
Codling Moth Control
insecticide applications each for
the first and second generations.
In Krawczyk's bioassay studies,
most products within three
classes of chemistry effectively
controlled codling moth when
sprayed at optimum timings. He
recommended rotating modes
of action, including IRAC Group
5 (Delegate®
WG insecticide),
Group 24 (diamides) and Group
32 (granuloviruses).
Delegate provides a unique
mode of action in insecticide
rotations because the active
ingredient, spinetoram, is
the only Group 5 insecticide.
Delivering fast knockdown
and long-lasting codling moth
control, Delegate also controls
a broad spectrum of key pests,
including Colorado potato
beetle, armyworms, leafrollers,
thrips, leafminers and more.
Preliminary laboratory bioassay
data on larvae collected during
the 2020 and 2021 seasons
showed consistent efficacy within
each mode of action, with some
exceptions.
Including mating disruption
with scheduled insecticide sprays
further improved the marketability
of apples in Krawczyk's studies.
" Every year since 2009, it
seems that mating disruption plus
insecticides help us keep fruit
clean, " he says.
Unfortunately, very heavy
pressure from internal fruit
worms during Krawczyk's 2021
on-farm studies, resulted in some
orchards still experiening more
than 10% fruit damage at harvest
despite the season-long use of
mating disruption along with
insecticide treatments.
Because anticipating moth
flights is key to codling
moth control, entomologists
recommend using degree days
and trap data to better time
insecticide treatments. Krawczyk
recommends the Network for
Environment and Weather
Applications, based at Cornell
University, for localized weather
and degree-day data. The site
offers data from more than 700
weather stations throughout the
Northeast and Mid-Atlantic
apple-growing regions.
Visit NEWA.Cornell.edu to
view weather-related IPM tools.
To learn more about the role
Delegate can play in your codling
moth control program, visit
DelegateWG.Corteva.US.
™ ®
Trademarks of Corteva Agriscience and its affiliated companies. Always read and follow label directions.
CA38-359-020 (03/22) BR CAAG1INTE054
ADVERTISEMENT | © 2022 Corteva
a division of Great American Publishing
FGN | MARCH 2022 | 5

http://www.FruitGrowersNews.com http://NEWA.Cornell.edu http://DelegateWG.Corteva.US

March 2022

Table of Contents for the Digital Edition of March 2022