Archive image from page 67 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 FiE. 62. Ridge formed by Marcy implement for protection agamst chinch-bugs. Post-holes are dug beside the ridge about fifty feet apart. This barrier is smooth and compact, and very little affected by the rain. The line of coal-tar along the top has been successful in all weather conditions. 'Kansas Experiment Station Report, 7.) (Fig. 60.) Sticky bands have long been used effec- tively
Archive image from page 67 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 FiE. 62. Ridge formed by Marcy implement for protection agamst chinch-bugs. Post-holes are dug beside the ridge about fifty feet apart. This barrier is smooth and compact, and very little affected by the rain. The line of coal-tar along the top has been successful in all weather conditions. 'Kansas Experiment Station Report, 7.) (Fig. 60.) Sticky bands have long been used effec- tively to prevent the wingless female moths of canker-worms ascending trees to lay their eggs. (Fig. 61.) For a quarter of a century before the advent of spraying, the principal mfans em- ployed to reduce the numbers of the (.-(Klling-moth were various kinds of cloth or hay-rope bands around the trunks of the trees to form more attrac- tive places for the caterpillars to Large numbers of the caterpillars gather under these bands, where they are easily killed. This effective banding method can now be used with profit to supplement the poison spray when a second brood of the insect occurs. Farmers often use the barrier method to prevent chinch-bugs, cutworms or army- worms from „ marching into other fields. Two furrows plowed to- gether and a narrow strip of coal-tar poured along the ridge thus formed, effec- tively stop chinch - bugs. (Fig. 62.) To stop army- worms a deep furrow is plowed w i't h the perpendic- ular side to- ward the field to be protected, and post-holes are then dug in the furrow at intervals of a rod or less. The caterpil- lars can not readily scale the furrow and so wan- der along it, finally dropping into the holes, where they can be killed with kerosene or crushed; bushels of the worms are often killed by this bar- rier method. Some insects may be jarred on sheets or into catchers. (Figs. 63, 64.) Farm practices. The American farmer who grows field
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