Show U Useful Parasites Today the economic use of ot part Pra Is I. world-wide world at house there Is U a catalogue of ot OO COMB parasites with Information about abott their habits hosts and the coun where they are found available for tor use uEle by the government go of ot the empire A timber pest yes u recently despoiling the forests of ot Canada A suitable parasite wj wart sought and found In the forests of Europe In 1932 the labors laboratory shipped to Canada to-Canada Canada cocoon cocoons of or that parasite Last year the export exports exceeded four tour million million presumably with correspondingly large to the C Canadian timber The t tm me may come when so 80 far as Its Insect friends and enemies are concerned economic vegetation throughout th the world will be completely under the control of ot man Manchester Manchester En Eng Guardian |