The importance of interspecific competition is a highly controversial and unresolved issue for community ecology in general, and for phytophagous insects in particular. Recent advancements, however, in our understanding of indirect (plant- and enemy-mediated) interactions challenge the historical paradigms of competition. Thus, in the context of this rapidly developing field, we re-evaluate the...

study of phytoseiid mites in some regions of western and north–westerniranwere carried out during 2008–2011. in this study, 21 species belonging to the six genera were collected and identified. they were associated with aerial parts, soil and litter under cultivated, uncultivated plants and some phytophagous mites and insects.

The hypothesis that rapid [gamma]-aminobutyrate (GABA) accumulation is a plant defense against phytophagous insects was investigated. Increasing GABA levels in a synthetic diet from 1.6 to 2.6 [mu]mol g-1 fresh weight reduced the growth rates, developmental rates, and survival rates of cultured Choristoneura rosaceana cv Harris larvae. Simulation of the mechanical damage resulting from phytopha...

This review reevaluates the importance of interspecific competition in the population biology of phytophagous insects and assesses factors that mediate competition. An examination of 193 pair-wise species interactions, repre­ senting all major feeding guilds, provided information on the occurrence, frequency, symmetry, consequences, and mechanisms of competition. Inter­ specific competition occ...