Results of work on blister beetles in Kansas . e beets where the beetles were feeding were sprayed with 1pound of lead arsenate in 9 gallons of water. Part of the potatoeswere sprayed with 1 pound of zinc arsenite in 32 gallons of water,part with 1 pound of Paris green and some lime in 40 gallons ofwater, and the remainder left as a check. The beets were so smalland so badly eaten before being sprayed that they never recovered. 24 BULLETIN 967, U. S. DEPARTMENT OF AGRICULTURE. The sprayed potatoes were only slightly injured by the beetles, butthe unsprayed ones were defoliated (fig. 22). On Ju
Results of work on blister beetles in Kansas . e beets where the beetles were feeding were sprayed with 1pound of lead arsenate in 9 gallons of water. Part of the potatoeswere sprayed with 1 pound of zinc arsenite in 32 gallons of water,part with 1 pound of Paris green and some lime in 40 gallons ofwater, and the remainder left as a check. The beets were so smalland so badly eaten before being sprayed that they never recovered. 24 BULLETIN 967, U. S. DEPARTMENT OF AGRICULTURE. The sprayed potatoes were only slightly injured by the beetles, butthe unsprayed ones were defoliated (fig. 22). On July 5 a small patch of potatoes, grown by Dr. CO. Town-send of the Bureau of Plant Industry for experimental purposes, wasattacked by blister beetles of several species. The potatoes werebeing sprayed with Bordeaux mixture, so Paris green was addedthereto for part of the patch and zinc arsenite for another potatoes designed to be left as a check on the Bordeaux treat-ment were sprayed with Paris green alone. These potatoes suffered. Fig. 22.—Field of potatoes attacked by blister beetles ; strip through middle left un-sprayed. Sprayed on left and on extreme right. (Photo by Lill, Bureau of PlantIndustry.) very little during the attack. Another invasion occurred threeweeks later, at which time the potatoes were all sprayed with Parisgreen, 1 pound to 25 gallons of Bordeaux where the latter was used,and the same strength alone on the remainder. No damage resultedfrom the second attack. Three acres of sugar beets belonging to Mr. D. A. Sheaks, ofGarden City, Kans., were attacked by blister beetles that gatheredin one edge of the field, most of them being large beetles (Macrobasisimmacidata). On July 26 about half of the field, including the in-fested portion, was sprayed with lj pounds of Paris green and somestone lime in 50 gallons of water. The beetles ceased their injury onthe sprayed portion of the field, those that escaped collecting onbeets on the unsprayed area.
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