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New Trillium species discovered

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Spider Mites

We are having a terrible time with spider mites this year in our
greenhouses due to the excessive heat early in the year. They have even
migrated to the hostas. How do you kill them!? We have tried Diazinon,
Cygon, Malithion, Avid, dormant oil spray, and insecticidal smoke bombs.
The damn things are invincible.

Mike Groothuis
Niles, MI
Maplewood Nursery

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