WINNIPEG, Jan. 4, 2013 /CNW/ - Warm weather during the 2012 grain
harvest benefited producers, but it also benefited insects that feed in
stored grain, says Brent Elliott, Infestation Control and Sanitation
Officer at the Canadian Grain Commission. However, cold winter weather
can help producers control insects.
"Now that winter's here, producers need to reconsider how they're
managing insects in their stored grain," explained Mr. Elliott.
"Because fumigation does not work below 5oC, it's not the preferred method for insect control. The good news is
cold temperatures are very helpful for controlling insect populations."
Colder temperatures allow producers to control insects by using a
combination of aeration and grain movement.
Aeration systems preserve stored grain and keep it dry by reducing the
temperature of grain and reducing moisture migration. If you use an
aeration system for your bins, you should turn it on during the winter
months to cool your grain. The temperature of the grain and the ambient
temperature outside will dictate how long to leave aeration on. More
information about aeration is available on the Canadian Grain
Commission's web site, www.grainscanada.gc.ca.
Prairie winters are usually quite cold, making winter the ideal time for
cooling grain. At minus 20 oC, it only takes one week to disinfest or control all life stages of
stored insect pests. The time needed for disinfestation changes
depending on the grain's temperature as shown in the table.
Disinfestation time periods
Constant grain temperature
Time period for disinfestation
Using grain movement
You can also use grain movement, which can kill insect pests such as the
rusty grain beetle and red flour beetle.
Augering grain out of a bin and then back in will reduce the insect
population. Augering also helps to break up any hot spots in the grain.
Molds and secondary insect pests, such as the foreign grain beetle, can
develop in hot spots.
In cold weather, grain exposed to cold air during augering will cool off
quickly. This may help to reduce your aeration time. However, you
should always monitor the temperature of the grain in storage to be
About the Canadian Grain Commission
The Canadian Grain Commission is the federal agency responsible for
establishing and maintaining Canada's grain quality standards. Its
programs result in shipments of grain that consistently meet
specifications for quality, safety and quantity. The Canadian Grain
Commission regulates the grain industry to protect producers' rights
and ensure the integrity of grain transactions.
SOURCE: Canadian Grain Commission
For further information:
Infestation and Sanitation Control Officer
Canadian Grain Commission
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