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Title: CALCULATING ECONOMIC INJURY LEVELS FOR STABLE FLIES (DIPTERA: MUSCIDAE) ON FEEDER HEIFERS

Author
item CATANGUI, MICHAEL - SO DAK STATE UNIV
item CAMPBELL, JOHN - UNIV NEBRASKA
item Thomas, Gustave
item BOXLER, DAVID - UNIV NEBRASKA

Submitted to: Journal of Economic Entomology
Publication Type: Review Article
Publication Acceptance Date: 9/17/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: A procedure for calculating the economic injury levels for stable flies, Stomoxys calcitrans (L.), on feeder heifers was developed from reduction of average daily weight gain-stable fly population level data in 8 independed replicated experiments over 17 yr. A negative exponential was fitted to the data using nonlinear regression. Regression coefficients were then used to derive a simple predictive equation for calculating the economic injury level in relation to cost of controlling stable flies in the feedlot, and the market value of heifers. Examples for calculating the economic injury level under practical feedlot situations are presented. Also included are recommendations for a simple random sampling design for stable flies in feedlots.