Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . c, beetle. Slightly rnag-uifled. INSECTS AFFECTING THE BEAN AND PEA. INJURING THE SEED. The Bean Weevil. Bruchus obsoletus. One often finds beans with numbers of excavationsin them, like those shown at Fig. 98, b. Such beansare affected, by the Bean Weevil—an insect that iswidely distributed over the United States, and oftendoes very serious damage. The adult weevil is represented natural size in theupper middle portion of Fig. 98, and enlarged at aof the same figure. It is asma
Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . c, beetle. Slightly rnag-uifled. INSECTS AFFECTING THE BEAN AND PEA. INJURING THE SEED. The Bean Weevil. Bruchus obsoletus. One often finds beans with numbers of excavationsin them, like those shown at Fig. 98, b. Such beansare affected, by the Bean Weevil—an insect that iswidely distributed over the United States, and oftendoes very serious damage. The adult weevil is represented natural size in theupper middle portion of Fig. 98, and enlarged at aof the same figure. It is asmall, brownish insect thatvery much resembles thenearly related Pea Weevil,to which it is also similar inlife-history and habits. Thefemale beetle deposits eggson the growing bean pods,and the larvae, on hatching, gnaw through the podto the young beans within. They enter these, feed-ing upon their substance, and remaining in them allsummer, most of them pupating before autumn. Aportion of them become adult beetles the same sea-son, while others do not complete their transforma-tions until the following Fig. 98. Beau Weevil: a, beetle,magnified; &, infested bean. 186 INSECTS AFFECTING THE BEAN. Remedies.—Beans infested by these pests shouldbe inclosed in tight vessels, into which a little bisul-phide of carbon, benzine, or gasoline has been fumes of these volatile substances will destroythe beetles. Of course care must be taken that noparticle of fire comes in the vicinity of the planting of the crop has been found a good wayto prevent injury by an extensive Illinois farmerliving in the latitude of St. Louis, Missouri, who, fora number of years, has planted his field beans fromJune 20th to July 10th, with good results. If thebeans, as soon as ripe, are heated to 145° Fahrenheit,,the partially grown larvse will be destroyed withoutinjury to the germinating qualities of the will prevent much of the damage that wouldbe done were the
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