Show WOODCHUCK 1 HAVE A VE SPREAD AND D MUCH DAMAGE co control rol was an important important important tant part of the work of the Biolo Biological Biological i- i ical cal Survey SUney of or t e United States Department Department De- De Deto of A e during th the past year Ori all ally confined chiefly to rough ston stony and where they die did relatively little woodchucks have invaded a as s devoted to or- or orchards or orchards and grai and root crops and have established themselves along alon levees i and other favor favor- favorable favorable favorable able retreats I r gir girdling lh g orchard 11 trees and upon the products product of the farm farm farm- th the tha c e rodents have become be- be become be become come a pest of considerable importance importance importance tance In the b of levees their burrows l ly make costly breaks in time high water and flood adjacent f mars and destro destroy crops They are responsible also for fOI serious washout in roads at bridge abutments and a ng culverts Practical met ds of fumigating woodchuck burr burros burro s fI with carbon fide or 01 calcium anide have been worked out In diana idiana Illinois New NewYork NewYork NewYork York and Mary ind nd demonstrations demonstrations demonstrations were atten d by approximately landowner landowners In 24 counties in Indiana 9 92 dem lem were at- at attended attended at attended tended by more hap han 2000 farmers and as a result pounds of cal cal- calcium calcium cal calcium cyanide we e used in poisoning campaigns again the posts In the Rocky fountain and Coast States woo chucks consume con considerable considerable considerable meador meado and locally invade orchards alfalfa and other farm truck uck and garde crops The use of bythe poisoning metho s demonstrated by the field ives of the Biological Biological Biological cal Survey SUr has p t a stop to to much of the damage I |