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Q.How do I prevent wasp infestation in my greenhouse?

Zone 4 | alithompson added on March 24, 2012 | Answered

I have a stand alone greenhouse with automatic vents. Every spring and summer it becomes infested with aggressive paper wasps. They tend to build their nests behind and under the planting beds so it is nearly impossible to see them until they are large. Any suggestions on how to deter them this year?

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Certified GKH Gardening Expert
Answered on March 26, 2012
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