Preventing insect or mite pests from entering the greenhouse is easier than attempting to kill them after they have entered the greenhouse. Many greenhouse producers introduce insect and mite pests into greenhouses when they receive shipments of infested plant material from another source. Carefully inspecting new plants before placing them into a greenhouse can minimize problems with insect and mitepests. Exclusion can also be achieved by screening greenhouse openings, including side and ridge vents with specially designed Holland Gaas screening material. It's like a safety net!
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