| host-associated allozyme variation in tree cambium miners, phytobia spp. (diptera: agromyzidae). | the larvae of the agromyzid flies that belong to the genus phytobia lioy feed by mining in the differentiating xylem just below the cambium of growing forest trees. the genus, which is apparently one of the most primitive groups in the agromyzidae, comprises over 50 currently recognized species. most of the species are mono- or oligophagous, and the host plants belong to numerous genera in about 60 families. thus, phytobia is an attractive candidate for studies on the evolution of insect-plant r ... | 2002 | 12399999 |
| allergic contact dermatitis from salicyl alcohol and salicylaldehyde in aspen bark (populus tremula). | salicyl alcohol or 2-methylolphenol is a well-known allergen in phenol-formaldehyde resins and a strong sensitizer in guinea pigs. there is 1 previous report of allergic contact dermatitis from salicyl alcohol in aspen bark. we describe a second case with concomitant allergy to salicylaldehyde. an elk researcher who had handled leaves from various trees presented with eczema of the hands, face, flexures, trunk and extremities. patch testing showed sensitivity to salicyl alcohol, salicylaldehyde, ... | 2005 | 15725287 |