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Thrips are tiny, almost microscopic, insects that are only about 1/16 of an inch in size. There are many different varieties of Thrips and they can range in color from brown to black to tan. Thrips can be serious pests for hundreds of different garden plants and trees. They cause their damage by ripping or scraping the surface of the leaf and then sucking sap from the leaves.
When Thrips are identified, spray with Bug Buster Pyrethrin Insect Spray. Repeat spraying every seven to ten days, until infestation is controlled.