ABSTRACT
Colorado ranks first in the country in sheep and lambs on feed, third in sugar beet production, fifth in cattle on feed and pear production, seventh in sorghum and corn for silage, thirteenth in winter wheat, and fifteenth in alfalfa hay production. Approximately 80% of the corn in Colorado is grown continuously on the same ground. The major pest problem on sorghum is the sorghum greenbug. The two most important weed problems in Colorado are Canadian thistle and field bindweed. Of less importance in the rangeland and cropland are: bull thistle, Scott's thistle, musk thistle, Russian knapweed, and the poverty weeds. For many years Aldrin and Dieldrin were the main pesticides used for grasshopper control in range. The word sanitation seems to come up in almost every pest control area. In urban areas it is of vital importance. The mountain pine bark beetle is the major forest pest in the Rockies.
