Pests & Diseases
Greenhouse Pests 101
What types of visitors can
you expect? Some of the most common greenhouse pests are
aphids,
whiteflies, and spider mites.
In the early stages of infestation, your students can handpick
and squash problem pests. For larger infestations, you might
try a diluted solution of insecticidal soap sprayed on the entire
plant, especially leaf undersides. You can purchase these commercially
or use mild dish liquids or soaps like Ivory Liquid (3 to 6
tablespoons per gallon of water). If you have a bad infestation,
spray every 3 to 5 days, first testing the solution on a small
portion of a leaf. While soap sprays can be effective with a
range of pests, they can also harm the good ones, so use them
judiciously.
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