OCR Text |
Show Useful Parasite Today the economic use of parasitology para-sitology Is world-wide; at Farnhaui house there Is a catalogue of (30,000 parasites, with Information about their habits, hosts, and the countries where they are found. Instantly available for use by the governments of the empire, A timber pest was recently despoiling the forests of Canada. A suitable parasite was sought and found In the forests of Europe, In 1932 the laboratory shipped to Canada 3,;ilK.i cocoons ot that parasite. Last year the exports exceeded four million presumably with correspondingly large benefit to the Canadian timber. The time may come when, so far as Its Insect friends and enemies are concerned, economic vegetation throughout the world will be completely under the control ot man. Manchester (Eng.) Guardian. |