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/IFAS Miami-Dade County Extension office began receiving numerous phone calls about heavy leaf loss in weeping fig ( Ficus benjamina ) hedges and plant death, which was a new problem. The cause was identified as the fig whitefly Singhiella simplex (Singh) in

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Brian K. Hogendorp, Raymond A. Cloyd, and John M. Swiader

mortality of sweetpotato whitefly B-biotype ( Bemisia tabaci Gennadius) feeding on cucumber. It is possible that the threshold silicon concentration value for providing silicon-mediated host-plant resistance to insect pests with piercing·sucking mouthparts

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Antonios E. Tsagkarakis, Michael E. Rogers, and Timothy M. Spann

applied to cotton ( Gossypium sp.) reduced cotton bollworm ( Helicoverpa zea ), cotton jassid ( Amrasca biguttula ), onion thrips ( Thrips tabaci ), and sweetpotato whitefly ( Bemisia tabaci ) infestations ( Ahmad et al., 2003 ; Zummo et al., 1984 ) and

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James D. McCreight and Michael D. Coffey

PI 313970. Materials and Methods Two naturally infected field tests were planted at DREC in 2005 and 2009. The fields were watered using subsurface drip irrigation for germination and subsequently as needed. Imidacloprid for control of sweetpotato

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Karen R. Harris, W. Patrick Wechter, and Amnon Levi

also are typically susceptible to root-knot nematodes ( Meloidogyne arenaria , M. incognita , M. javanica ) ( Thies and Levi, 2007 ), to arthropods including two-spotted spider-mite ( Tetranychus urticae ) ( Lopez et al., 2005 ), and to sweetpotato

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Toshio Shibuya, Ryosuke Endo, Yoshiaki Kitaya, and Saki Hayashi

Preference of sweetpotato whitefly adults to cucumber seedlings grown under two different light sources HortTchnology 20 873 876 Smith, H. Whitelam, G.C. 1997 The shade avoidance syndrome: Multiple responses mediated by multiple phytochromes Plant Cell

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Heidi Marie Wollaeger and Erik S. Runkle

specific R:B responses have varied among studies ( Goins et al., 1997 ; Kato et al., 2011 ; Yang et al., 2011 ). An R (peak = 660 nm) to B (peak = 450 nm) ratio of 8:1 produced sweetpotato ( Ipomoea batatas ) plants with the greatest root-to-shoot ratio