Fruit Insects

h-1 Fifty years ago, fruit growers employed many makeshift methods for controlling insects. Some used whiskbrooms for applying sprays to small fruits. Others, like the man in the picture, dusted low growing plants (gooseberries) by using a coarse, mesh-cloth bag containing insecticidal dust.
An early method for controlling the San Jose scale--an insect pest of apples, peaches, and pears--was to spray the trees during their dormant season with oil by using a hand operated pump barrel sprayer. Two men were needed for this operation: one man to do the pumping and the other man the spraying. h-2
h-3 This speed sprayer is blowing insecticides on to orange trees. The air blast is produced by a modified airplane propeller, which rotates at high speed. Modern power applicators save time and labor and provide an efficient method for controlling insects.
Entomologists often need to know how serious a foreign pest might be if it should find its way to this country. Recently, they devised this bioclimatic cabinet in which any climate, including temperature and humidity, can be simulated. They have used it in oriental fruit fly experiments in Hawaii to determine conditions under which the insect thrives. In this way they learn where in the continental United States this pest might flourish if it were brought accidentally to the mainland. h-4


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