Onion Thrips - Utah Pests - Utah State University

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In general, more thrips occurred on caged than open plants 2-3 wk after treatment • Egg reservoir in leaves is important to reinfestation of plant • Exceptions: Lannate, Movento, & Radiant – longer-term suppression of thrips on plants Flying thrips adults: highly abundant • ~ 150-300 adults per trap per week after insecticide id applications
Egg survival and immigrating adults following insecticide applications help perpetuate thrips population on onions Suppression strategies: include prevention of egg-laying and egg hatch Future studies: • Larger sample sizes (improve consistency) • Evaluate survival of non-feeding 3 rd and 4 th instar larvae (pre-pupae p p & pupae) p
Page 1 and 2: Egg Diane Alston Entomologist Utah
Page 3 and 4: Adults Eggs, Larvae, & Adults Prepu
Page 5 and 6: Examples from 2006 & 07 insecticide
Page 7 and 8: Insecticide efficacy Motile thrips
Page 9 and 10: Insecticide efficacy Adult Western
Page 11 and 12: In 2006: • Success, Carzol, and W
Page 15 and 16: Effect of immobile life stages on p
Page 17 and 18: Insecticide efficacy Thrips Eggs (S
Page 19 and 20: Egg hatch from leaves Egg hatching
Page 21 and 22: er leaf thrips pe hatched t an # of
Page 23 and 24: Eggs are the major contributor to p
Page 27 and 28: Importance of egg survival Influenc
Page 29 and 30: Influence of exclusion (caging) on
Page 31: Abundance of Immigrating Adults Inf
Page 35 and 36: Mortality factor (insecticide): •
Page 37: Make onions as tolerant / unattract

Onion Thrips - Utah Pests - Utah State University

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