Host Orientation Behavior of Dendroctonus ponderosae: Integration of Token Stimuli Host and Defenses

摘要: All phytophagous insects must somehow identify suitable substrates for reproduction and development. For most insect species, the identifying process involves “decisions” about plant species parts. Among polyphagous insects, many can serve as hosts, but some host provide a better substrate than others. In cases, may exhibit preference more (e.g., Barbosaet al. 1983). Even within single of plants, individuals vary in their suitability. example, Cateset (1983) demonstrated that western spruce budworm larvae,Choristoneura occidentalis, from different Douglas fir trees,Pseudotsuga menziesii. yield adults varying size fecundity. The same was true Abies Picea sites (Schmittet 1983) gypsy moth, Lvmantria dispar, trees with histories defoliation (Schultz Baldwin 1982, Valentineet each these effects intraspecific variation on suitability are quantitative. other words, almost any member population is suitable, confer higher fitness to