Show forest diseases spread by wind blown insects OTTAWA aerial in invasions v anions caused by winds blowing large larg e num tiers bers of dangerous insects hundreds 0 ot f miles in a lew few hours hour constitute a menace to our forests forest Ls and agriculture dr E P felt ento entomologist melo of stamford conn told the american association tor for the advancement van cement ol of science here dutch elm disease now a serious problem in the eastern united states is being spread presumably fay by wind drift of the european elm hark bark beetle the principal carrier of the disease doctor felt indicated using balloons to meas measure ure the J travel of insects drifting at considerable heights in air currents he carre carne to the conclusion that this of of travel is more important law hitherto believed winds may carry insects in large ri numbers ambers for miles under exceptional con al circumstances insects drifting at rates of 50 to miles per hour bour are not uncommon the appearance each year of the siu thern cotton moth in new england and southern canada is attributed to wind drift and doctor felt believes tha thai i the recent distribution of the european spruce sawfly in a large part of new england is due to the wind |