J. Anim Sci.
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J. Anim Sci. 1982. 54:632-639.
© 1982 American Society of Animal Science
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Effects of Xanthene Dyes in Cattle Diets for Insect Control: Diet Digestibility and Fecal Excretion1,2,

T. E. Fairbrother3, W. A. Peeples, II4, H. W. Essig3, J. R. Heitz4 and R. L. Combs5

Mississippi State University, Mississippi State 39762

Abstract

The effects of rose bengal, erythrosin B and fluorescein on ruminant digestion were evaluated by an in vitro rumen technique. Rose bengal reduced in vitro dry matter disappearance (IVDMD) values starting at .5 mM in the nutrient media and erythrosin B reduced IVDMD values starting at .05 mM in the nutrient media. Maximum reduction in IVDMD values was observed at 3.0 mM of rose bengal and erythrosin B. Fluorescein depressed digestion but not as severely as rose bengal or erythrosin B. Dry matter digestibility (DMD) values for steers given erythrosin B at a daily dosage of 6.5 mg/kg body weight were higher (P<.05) than DMD values for control steers. DMD values were higher for steers given 16.3 or 26.1 mg erythrosin B/kg body weight daily than for the control steers, but the differences were not significant. There were no significant differneces among animals given the different dosages in digestible energy. Recovery of erythrosin B from feces of treated steers varied with time, indicating that steers fed erythrosin B at a dosage of 6.5 mg/kg body weight might excrete feces during some periods of the day which would not control facefly development; however, administration of erythrosin B at a dosage of 16.3 mg/kg body weight would provide enough erythrosin B in feces to control face fly development throughout a 24-h period.

Footnotes

1 Mississippi Agr. and Forestry Exp. Sta. Journal Article No. 4499

2 Data taken from a disertation submitted by the senior in partial fulfillment of the requiresments for the Ph.D. degree at Mississippi State University.

3 Dept. of Anim. Sci.

4 Dept. of Biochem.

5 Dept. of Entomol., Mississippi Agr. and Forestry Exp. Sta., Mississippi State Univ., Mississippi State 39762.






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Copyright © 1982 by the American Society of Animal Science.