Use potato plugs to monitor for larvae during cool, cloudy weather. Use yellow sticky cards to monitor for adults. Azadirachtin Bacillus thuringiensis subsp. Aster, Campanula, Chrysanthemum, Coreopsis, Digitalis, Eupatorium, Lamium, Lupinus, Penstemon, Platycodon, Rudbeckia , and Sedum Inspect and quarantine incoming plants for evidence of thrips larvae or adults. Use yellow sticky cards to monitor for adults.
Check cards weekly to track population levels and evaluate treatments.
Aquilegia, Astilbe, Dicentra, Hibiscus, Lavandula, Lupinus, Malva, Mentha, Mondara, Primula, Salvia and Rudbeckia Use yellow sticky cards to monitor for adults. Powdery white adults will be on underside of uppermost foliage. Larger, more mature crawlers will be on the lowermost leaves. Alcea, Aquilegia, Buddleia, Campanula, Gaillardia, Hemerocallis, Japanese Iris, Lirope, Phlox, Primula, Rudbeckia, Salvia, Thalictrum, Verbascum, Viola , and many herbs. Overwinter as adult females in protected areas.