The investigations to determine what part, if any, insects take in
the transmission of the chestnut blight have been continued under the
immediate direction of Prof. A. G. Ruggles. A number of interesting
facts have been determined, but several important studies were just
well under way when the work was suspended.
The relation of insects to blight dissemination comes under three
headings; first, insects that carry the spores of the fungus and
actually start new infections at the time; second, insects that carry
the spores but do not directly start infections; and third, insects
that make wounds in which infection readily takes place through spores
carried by some other agency.