Volume
5 Issue 10
July 22, 2008
Three New Soybean Aphid Insecticides
All are restricted
use pesticides. Pre –harvest intervals (PHI) and re-entry intervals
(REI) do not necessarily correspond to the duration of insecticide
activity. The following is not intended as an endorsement of any
product. READ THE LABEL!
http://www.cdms.net/LabelsMsds/LMDefault.aspx
Also,
Relax
Marketing pressure for insurance
aphid treatments is at an all time high. Claims of efficacy and
residual control magic abound. One consultant cynically asked if the
claims of elephant repellency could be true.
High crop value does not mean that
detectable crop injury occurs with fewer aphids. Exposing more
aphids (and mites) to insecticide increases the selection pressure
for resistance. We are applying quite enough pressure just treating
fields at Economic Threshold. Remember, soybean aphid populations
are all clones (genetically identical) after the eggs hatch on
buckthorn. Any successful genetic shift cannot be undone until
sexual reproduction on buckthorn in the fall, if at all.
Hero™
FMC Corporation
Contains two pyrethroids (zeta-cypermethrin
same as Mustang) and bifenthrin (same as Capture). The soybean aphid
rate is 4.0 – 10.3 oz/A. This product is labeled for two spotted
spider mite control at 10.3 oz/A. PHI: 21 days. Do not make
applications less than 30 days apart.
Leverage® 2.7
Bayer Crop Science
Contains a pyrethroid (cyfluthrin
same as Baythroid) and a Neonicitinoid (imadicloprid the active
ingredient in Gaucho). Soybean aphid rate is 3.8 fluid oz./A. PHI:
45 days. Do not make applications less than 7 days apart.
Resistance
management guidelines (on the label) indicate that this product
should not be applied to soybeans that have had a neonicitinoid seed
treatment (e.g. Cruiser ).
Warrior II with
Zeon technology ™ Syngenta
This is a new formulation of the
pyrethroid insecticide Warrior (lambda-cyhalothrin). Warrior II is a
2.08 lb/gallon formulation compared to the older 1 lb/gallon
formulation.
There are some
of both formulations out there so pay attention to rate by
formulation.
The soybean aphid rate for Warrior II is 0.96 – 1.6
fl oz./A. PHI: 30 days.
Bruce Potter, IPM Specialist
SWROC, Lamberton
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