March 2021 - 35

MATING DISRUPTION
assessing effectiveness are needed.
* Treatment thresholds have been
developed using these high dose
lures, but in most cases they are
dependent on levels of injury
from previous seasons or on the
trap catches of pest generations
previous to disruption.
Special considerations are necessary
for type of mating disruption product,
rate, and application method being used.
Borders of disrupted blocks are often
at higher risk because of pest mating
occurring outside the disrupted area,
and therefore efficacy increases with the
size of the block treated. Peach and apple
orchards adjacent to each other benefit
from disruption in both crops for pests
like the Oriental fruit moth. The residual
activities of many of these products vary
greatly. Below are some of the types of
pheromones and special considerations
in use.
Sprayable pheromones
Microencapsulated pheromones
are enclosed in a polymer capsule that
controls the pheromone release rate.
These capsules are small enough and
durable enough to be applied in water
through normal airblast sprays in the
same manner as conventional pesticides.
This makes them very attractive for use
by many fruit growers.
Residual activity is generally up
to 4 to 6 weeks, which gives them
some flexibility in pest management
programs, but also means they may
need to be reapplied several times in
a season for a target pest. Residual
activity may be reduced by rainfall
soon after application and a sticker type
spray adjuvant is often recommended.
Several formulations for codling moth
and several species of leafrollers and
wood-boring insects have been tested
and even sold commercially, but have
not given reliable control.
Hand-applied dispensers
These are systems with an impermeable
reservoir fitted with an impermeable
membrane for regulating pheromone
release. Pheromone impregnated polymer
spirals, ropes, dispensers, or tubes are the
most commonly used products currently.
Wires, clips, or circular twin tubes allow
these dispensers to be twist-tied, clipped,
or draped directly onto the plant. The
larger reservoirs of these products allow
for longer residual activity ranging from
60 to 140 days. This may allow early
season applications to suppress mating
for most or all of the growing season
depending on the type of dispenser and
pest species. Application rates vary from
one to several dispensers per tree (2 to
400 dispensers per acre) and can be labor
intensive. Costs for these products tend to
be significantly higher than the chemical
control programs they are replacing,
especially in high pest pressure situations
where supplemental insecticides would
be needed for acceptable control.
Hand-applied dispensers can be
used to either control a single or
multiple species of pests. FGN
TURNED ON 24-7!
* 2-FOR-1: Disrupts BOTH Female & Male CM
* BETTER Pheromone Distribution
* NO-Maintenance!/NO-Second Guessing!
™
™
Codling Moth!
Mating disruption product for conventional
and organic apples and pears!!
LOWER LABOR COST
32 dispensers/acre
MESO
MESO™
™
™
MATING
DISRUPTION PRODUCT
FOR CODLING MOTH IN APPLES & PEARS
INSECT PHEROMONE & KAIROMONE SYSTEMS
INCORPORATED
Contact your local supplier and order now!
Visit our website: www.trece.com or call: 1- 866-785-1313.
© 2021, Trécé Inc., Adair, OK USA * TRECE, PHEROCON and CIDETRAK are registered trademarks of Trece, Inc., Adair, OK USA * TRE-1907, 2/21
FGN | MARCH 2021 | 35
®

http://www.trece.com

March 2021

Table of Contents for the Digital Edition of March 2021