David Held, david.held@msstate.edu, Mississippi State University, Coastal Research and Extension Center, 1815 Popps Ferry Road, Biloxi, MS and David W. Boyd, dboyd@ars.usda.gov, USDA, ARS, P.O. Box 287, 306 S. High St, Poplarville, MS.
Gynaikothrips uzeli Zimmerman (Thysanoptera: Phlaeothripidae) was inadvertently introduced into at least five southern states from 2003–2005. This thrips is the primary gall maker (i.e., leaf folder) on
Ficus benjamina, the weeping fig, and this species of Ficus is the only reported host on which
G. uzeli can successfully complete its life cycle. Gall formation permanently disfigures leaves and protects developing thrips and adults from most insecticides. Our objective was to develop a means to monitor this thrips and evaluated control strategies to protect plants form gall formation. Yellow sticky cards are an effective method for monitoring thrips. Yellow is superior to blue, green, and white in attracting adults. Because this is an exotic species there were no published insecticide recommendations. We evaluated foliar and soil applied insecticides for control of adult thrips in order to prevent gall formation. Most systemic, neonicotinoid insecticides (e.g., Celero, Safari, Discus, Marathon, Flagship, Tri-Star) and conventional insecticides (e.g., Dursban, Sevin, and Orthene) provide only 7 days of effective control of adults. Similarly, biorationals such as Safer insecticidal soap, Conserve, Avid, and Azatin provide moderate to poor control of adults. Monitoring and management results are already being implemented by growers. This may slow or reduce the continued spread of this species.
Species 1: Thysanoptera Phlaeothripidae
Gynaikothrips uzeliKeywords: Gall Maker, Management