The Nineteenth Biennial Meeting of the International Plant Resistance to Insects (IPRI) Workshop was held 28–31 March 2010 in Charleston, SC. This workshop was attended by 71 participants from six countries. There were 17 symposium papers (three symposia), 22 submitted papers, 9 student competition papers, and 21 posters presented. The abstracts of 52 of the 69 presentations and posters are presented herein.

Long-term efficacy of neonicotinoids (clothianidin, imidacloprid, and thiamethoxam), acephate, bifenthrin, and fipronil in suppressing the tunneling activity of mole crickets (Orthoptera: Gryllotalpidae) was investigated in athletic fields in Florence, SC from June to December 2008 and 2009. The proportions of tawny mole cricket (Scapteriscus vicinus Scudder) and southern mole cricket (Scapteriscus borellii Giglio-Tos) were 87% and 13% in 2008 and 78% and 22% in 2009, respectively. Plots treated with insecticides had lower ratings of tunneling damage than the untreated plots, which had the most severe damage in October of 2008 and 2009. Fipronil was the most effective insecticide, which reduced tunneling activity from 4.0 ± 0.9 to 0.8 ± 0.3 and 5.3 ± 0.3 to 1.1 ± 0.1 within two weeks after treatment (WAT) in 2008 and 2009, respectively, and maintained effective residual control until December. Neonicotinoids (all active ingredients and formulations), acephate, and bifenthrin did not perform as well as fipronil, but contributed to lowering the damage in the treated plots. The long-term efficacy was not significantly different among products containing clothianidin, imidacloprid, and thiamethoxam. The combination of clothianidin and bifenthrin (Aloft™) and imidacloprid and bifenthrin (Allectus®) improved the suppression of tunneling activity only in the first two WAT when compared to products containing only clothianidin (Arena™) or imidacloprid (Merit®). The efficacy of Aloft and Allectus against mole crickets was not different between broadcast and granular formulations on most sampling dates. This study demonstrated that products containing fipronil provided turf managers with long-term suppression of mole cricket tunneling damage, while products containing acephate, bifenthrin, and neonicotinoids would only provide suppression for 20 weeks.

Odontotermes formosanus (Shiraki) and O. hainanensis (Light) (Isoptera: Termitidae) are two dominant termite species that damage earthen dikes in China. This paper describes behavioral biology (mating, egg caring, hatching, and molting) and development of incipient colonies of these two species under laboratory conditions. Oviposition of O. formosanus and O. hainanensis began 8–11 d and 2–5 d after mating, respectively. The eggs of both species were laid in batches. Egg hatching of O. formosanus and O. hainanensis required assistance from parents or nestmates. Average hatching periods of these two species were 31 d and 27 d, respectively. The molting process of O. formosanus and O. hainanensis also required help from nestmates. Such assistance was more essential for O. hainanensis than for O. formosanus. Average developmental times from newly hatched O. formosanus to adult workers and to soldiers were 16.7 d and 23.8 d, respectively. For O. hainanensis, these times were 18.1 d and 19.6 d, respectively. The survival rate of the incipient colonies of O. formosanus at 6 mo after establishment was below 50%. Colony death probably was due to unsuccessful culture of the fungus, Termitosphaeria duthiei.