VIEW ARTICLE

Light Affects Penetration and Infection of Pines by Dwarf Mistletoe. Robert F. Scharpf, Pacific Southwest Forest and Range Experiment Station, Forest Service, USDA, Berkeley, California 94701; Phytopathology 62:1271-1273. Accepted for publication 16 May 1972. DOI: 10.1094/Phyto-62-1271.

Light appears necessary for the infection of Digger pine, Pinus sabiniana, by Arceuthobium occidentale. Highest percentage of infection occurred under full and half sunlight. Little infection occurred in the absence of light.