*Weed control in greenhouse:*
Prevention: Keep weed  (seed, rhizomes, tubers, etc.) out of the greenhouse
by using sterile media, introducing only "clean" plant materials, and
controlling the weeds outside of the greenhouse. Where possible, *screen
vents and other openings* to limit the introduction of windblown seed as
well as flying pests. Again - Clorox can be your best weapon!
Use a 1:10 solution to spray down floors, growing benches, drip containers
in and wipe propagation tools. Clorox is a very corrosive product. Zerotol
is another option available from vendors like Griffin Greenhouse Supplies
and BWI.

*Controlling Existing Weeds*
If the weeds are already established in the greenhouse, they can be killed
in the following ways:
1.Manual removal (6th graders love this!)
2. Empty the greenhouse during the hot summer months and allow weeds to dry
up (solarization)
3. Treat with a postemergence herbicide
Make sure you use a postemergence herbicides labeled for use inside
greenhouses. There are very specific restrictions on the use of herbicides
in greenhouses. With one exception, the products described below are only
for use under benches, in walkways and around the foundation of the
greenhouse. They are not for use in pots or ground beds where crop plants
are growing. Read the label and carefully observe any precautions. Always
wear personal protective equipment when applying pesticides in a
greenhouse. If the postemergence is in a liquid application form make sure
your air circulation fans are turned off during the application. Avoid
aerial drift by using a low pressure, large droplet type nozzle.

*Preventing Weed Seed Germination*
BareSpot is non-selective residual herbicide may be used under benches, in
gravel walkways and around the foundation of the
greenhouse. The active ingredients in Barespot are sodium chlorate and
sodium metaborate. Do not allow the product to come in contact with
containers or greenhouse ground beds. After application, water-in to
activate the herbicide.

*Outside of the Greenhouse*
The primary objective of weed control outside the greenhouse is to
eliminate a major source of airborne weed seed and to prevent
perennial weeds such as bermudagrass from growing under the foundation and
into the greenhouse.

*Insecticide Basics for the Pest Management Professional - Educational

GGSPro Tech Tips:

This is a great resource. Use the link above to answer many common
greenhouse pest issues. There’s way too much information on this page, so I
would suggest searching within the page (Ctrl F) to find what you might be
looking for.

*Good Greenhouse Rules:*
Here are some other good rules for your greenhouse.
No smoking or tobacco products in greenhouse. If you or students do smoke
or use tobacco products, disinfect your hands before entering the
greenhouse to prevent spreading tobacco mosaic virus.
Clean your boots/shoes before entering or change into a clean pair of
greenhouse shoes or boots.
Keep hose ends off the floor.
Discard pet plants, unnecessary plants, infested plants, and weeds under
Control ants as they can harbor and protect aphids, mealy bugs and scales.
Always wear closed toe shoes when working in the greenhouse.

Josh Allen
North Region Ag Education
1420 Experiment Station Road
Watkinsville, GA 30677
706-202-0770 cell