The losses to livestock from insects are much more subtle than losses from animal diseases such as "Red Nose" or calf scours but real and costly nevertheless. The Federal Extension Service tries each year to get some estimate on the losses from insects on both crops and animals. These data are not too difficult to obtain for crops because the insect damage is quite visible and yield comparisons make it accurate data. The data on livestock losses from insects, however, are much more subject to guesswork. The estimates are that the livestock industry suffers around a 500 million dollar loss annually from insects. If we use this figure, you could divide it evenly and say each state would lose 10 million annually. The Great Plains states, of course, would lose by far more than 10 million because of the numbers of livestock produced in those states.
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Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Campbell, John B., "The Economics of Livestock Insects at the Feedlot and on the Range" (1977). South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1977. 12.