January 2020 - 14

dr. bugs
BY RAYMOND A. CLOYD
Ryanodine Receptor Modulators -
IRAC Group 28
Question: I have heard there are a number of new insecticides associated with the
Insecticide Resistance Action Committee (IRAC) group 28. Can you please provide
information on this group of insecticides?
Raymond A. Cloyd
is professor and
Extension specialist
in horticultural
entomology/
plant protection
at Kansas State
University. He
can be reached at
rcloyd@ksu.edu.
Answer: Yes, there are three
insecticides in the chemical class
antranile diamide that are in the
IRAC group 28 registered for use
in greenhouse production systems.
These include: cyantraniliprole
(Mainspring), cyclaniliprole (Sarisa)
and chlorantraniliprole (Acelepyrn).
The insecticides are labeled for use
against sucking and chewing insect
pests, and are slower-acting than
other insecticides due to their low
water solubility, which ranges from
0.15 to 14.2 mg/L.
INSECTICIDES
Cyantraniliprole (Mainspring,
Syngenta Crop Protection LLC) can be
applied as a foliar spray or drench to
the growing medium. The insecticide
is labeled for use against aphids,
leaf-feeding beetles, leaf-feeding
caterpillars, thrips and whiteflies. The
restricted entry interval (REI) of the
product is four hours. Cyantraniliprole
has contact, translaminar and systemic
activity. When applied to the growing
medium as a drench, cyantraniliprole
may provide between eight to 12 weeks
of activity (insect control).
Cyclaniliprole (Sarisa, OHP Inc.)
can only be applied as a foliar
spray. The insecticide is labeled for
use against aphids, leaf-feeding
caterpillars, mealybugs, thrips and
whiteflies. The product has a four-hour
REI. Cyclaniliprole has contact and
translaminar activity, and provides
between three to four weeks of
residual activity (insect control) when
applied to plant leaves.
14 JANUARY 2020 GPNMAG.COM
Aphids.
Caterpillar (Tobacco Budworm).

http://www.GPNMAG.COM

January 2020

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