Help On The Way For Soybean Aphid by bigbro22

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									                                                                                         White County
                                                                                         Greg Bossaer, Ag Extension Educator
                                                                                         April 25, 2008




Help On The Way For Soybean Aphid
Entomologists throughout the Midwest seem to be in agreement that soybean aphid will probably not be a
major pest in 2008. Since its’ arrival at the turn of the century, soybean aphid outbreaks have been following a
pattern of occurring every other year. The belief is that natural predator populations, such as Asian Lady Bug,
build quickly when aphid populations are high. While aphid populations crash with cooler fall temperatures,
Asian Lady Bugs remain active and dramatically consume a high percentage of the soybean aphids left to
overwinter. In fall of 2007, suction traps throughout the Midwest registered extremely low numbers of adult,
winged soybean aphid. For example, in Indiana, last fall 59 soybean aphid were trapped, while in the fall of
2006 that total was 8322.

Information from the Indiana Soybean Alliance indicates that check-off funded research for the development of
soybean varieties resistant to soybean aphid look promising. However, the commercial release of soybean
varieties resistant to soybean aphid is probably still at least a few years away. Scientists are actively involved
with trials to determine which soybean lines seem to attract fewer aphids. Resistance may be associated with
lines that have more natural pubescence, small hairs on the leaves and stems; or lines that when fed upon by
the aphid, reproduction is disrupted; or lines that can be fed upon without yield loss.




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