Resin midges in Monterey pine Christmas trees

Ecological Notes on the Pine Midges Retinodiplosis

Status of conservation for Monterey pine

Genetic Improvement of Christmas Trees

While seed source selection is an important initial step in the genetic improvement of Christmas trees, continuously returning to seed collections from natural stands precludes any further improvement in genetic quality. In addition, the genetic variation within most seed sources is tremendous and varies from year to year. In order for the Christmas tree industry to move past the current level ...

Increased resin flow in mature pine trees growing under elevated CO2 and moderate soil fertility.

Warmer climates induced by elevated atmospheric CO(2) (eCO(2)) are expected to increase damaging bark beetle activity in pine forests, yet the effect of eCO(2) on resin production--the tree's primary defense against beetle attack--remains largely unknown. Following growth-differentiation balance theory, if extra carbohydrates produced under eCO(2) are not consumed by respiration or growth, resi...

1958 - 07 Ecological Notes on the Pine Midges