. Biology and man. Biology; Human beings. Adult beetle feeding on gypsy moth larvae ENGAGED TO FIGHT OTHER INSECTS Pupae. Gypsy moth pupae destroyed by beetle larvae Bureau of Entomology and Plant Quarantine, This beautiful green calosoma beetle (Calosoma sycophanta) was used by a French scientist in 1840, in a campaign against the gypsy moth (Porthetria dispar). In recent years this method of combating undesirable insects by encouraging the spread of their natural enemies has been rapidly developed milky fluid. Dead larvae, the skin containing now millions of spores, are dried and gr
. Biology and man. Biology; Human beings. Adult beetle feeding on gypsy moth larvae ENGAGED TO FIGHT OTHER INSECTS Pupae. Gypsy moth pupae destroyed by beetle larvae Bureau of Entomology and Plant Quarantine, This beautiful green calosoma beetle (Calosoma sycophanta) was used by a French scientist in 1840, in a campaign against the gypsy moth (Porthetria dispar). In recent years this method of combating undesirable insects by encouraging the spread of their natural enemies has been rapidly developed milky fluid. Dead larvae, the skin containing now millions of spores, are dried and ground to dust, and mixed with an inert powder. The mixture is dis- tributed on the soil of an infested area, and the larvae become infected. Other insects have been successfully combated with parasitic bacteria and fungi. In South America and in Yucatan this method has been used against locusts. Quantities of the insects are caught alive, infected with the parasitic fungus, and then set free again. The escaped animals transmit the infection to their fellows, and millions are killed off. One epidemic is made to over- come another, until a balance is restored. Man the Disturber Man has been extending his domination over the earth at an ever-increasing pace. He has succeeded not by growing stronger muscles, longer teeth or sharper claws, but through his scheming, planning, devising, manipulating. He began by handling sticks and stones that he could pick up. These enabled him to exert power and to produce effects at a dis- 596. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965; Bingham, N. Eldred (Nelson Eldred), 1901-. Boston, New York, [etc. ] Ginn and company
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Keywords: ., book, bookcentury1900, booksubjectbiology, booksubjecthumanbeings
