Thrip, Flower (Frankliniella spp.)
Order: Thysanoptera; Family: Thripidae
Adult, 1/64" (1/2 mm), slender with fringed wings, yellow, brown or black. Egg,
inserted in plant tissue, especially flower parts and young fruit. Larva, like
small adults (nymphs) but lighter and wingless, inhabit flowers, terminal buds and leaves.
Pupa, similar to larva but with wing pads, found in soil.
Life Cycle: Cycle time 10 - 30 days.
Western flower thrips (F. occindentalis), Tobacco thrips (F. fusca)
and sometimes Common blossom thrips (F. schultzei) transfer tomato spotted wilt
virus. Western flower thrips insert their eggs individually in small fruit and cause
dimples, sometimes with a white area surrounding dimples. Florida flower thrips (F.
bispinosa) can cause flower abortion and poor fruit set. Eastern flower thrips (F.
tritici) are not usually a pest.
Cultural - Water plants adequately.
Mechanical - Yellow or blue sticky traps. Use water spray to wash off.
Biological - Green lacewings and predatory mites
Chemical - Sulfur, soap spray, oil spray, pyrethrum, rotenone, ryania and neem. Follow
label instructions carefully to avoid injury to your plant, yourself, your pets or the
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Chemical - zzz Follow label instructions carefully to avoid injury to your plant,
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Last edited: 07/12/98 12:02 AM