It has long been hypothesized that invasive pests may be facilitated by the evolutionary naïveté of their new hosts, but this prediction has never been examined in a phylogenetic framework. To address the hypothesis, we have been studying the invasive viburnum leaf beetle (Pyrrhalta viburni), which is decimating North American native species of Viburnum, a clade of worldwide importance as under...

—The apparently aposematic immature stages of a tropical shining leaf beetle, Lema insularis, are described, the host plant is revealed to be Dioscorea mexicana, and observations on the camouflaged larvae of a co-existing herbivore, the sawfly Acorduloceridea compressicornis, and the adults of a co-mimic, Diabrotica godmani, are made.

Materials and Methods Varieties selected for the 2003 organic soybean variety trial included the following: IA3011, IA3021, IA3022, Pioneer 9305, Schillinger 240F.Y, and Schillinger 290F.HP. Plots measuring 20 × 40 feet were laid out in a completely randomized block design with four replications of each variety. Soybeans were planted at a depth of 2 inches on May 28, 2003, at a rate of 200,000 ...