Search Results
You are looking at 1 - 2 of 2 items for
- Author or Editor: Catherine D. Carter x
Abstract
Spider mite behavior was characterized on leaflets, varying in extent of expansion, from mite-resistant Lycopersicon hirsutum and mite-susceptible L. esculentum plants. Survival, mortality, avoidance, and fecundity of the mites were related to Type VI trichome density and/or other covariants of leaflet development. At equivalent Type VI densities L. hirsutum leaflets were more resistant than those of L. esculentum. Thus, differential density of the Type VI trichome did not account fully for the resistance of the L. hirsutum plants. Mite mortality was associated with the presence of the L. hirsutum Type VI trichome tips and mite avoidance was associated with other factors that covaried with L. hirsutum leaflet development and leaflet surface.
Abstract
A full-sib family of F2 individuals from a cross between mite-susceptible Lycopersicon esculentum Mill and mite-resistant Lycopersicon hirsutum Humb and Bonpl. was assayed for trichome characters and resistance to spider mites (Tetranychus urticae Koch). Mite responses primarily were associated with density of the Type IV trichome and, to a much less degree, with the leaflet surface bioassayed and phenol content of the Type VI trichome tip. Mite survival on F2 hybrids with at least 5.6 Type IV trichomes per mm2 was comparable to that on L. hirsutum.