The Chemical Residue Problem in Replacement Heifers |
Previous | 1 of 3 | Next |
|
small (250x250 max)
medium (500x500 max)
Large
Extra Large
large ( > 500x500)
Full Resolution
All (PDF)
|
This page
All
|
(
(
~
COO:Jperotive Ex tension
OCT 02 1981
NEW ,
UNIVEf..::iJrY I
THE CHEMICAL RESIDUE PROBLEM
IN REPLACE~r HEIFERS
- - New M fJ.1{ ico Stote U n ive rsity
T:te DHIA report for Apr i l presented some questions and ans~~ers on the problem
0:: c~euri.cal resiciues. Since that report was prepared , considerable publ icity has
be~D given to fourteen dairy producers i n Pennsylvania and Maryland supplying the
.... -~::.icgton. D. C. , market. These producers had their permits suspencied because of
a:tionable residue l evels in their milk. The offendi ng substance was heptachlor
,,;:oxide ".hieh has been taken off the appr oved chemical list since that time. This
5:;:;;4::£"0 emphasizes the seriousness of the chemical residue problem in the nation.
During recent months. some New Hexico dairymen have been grazing replacement
~i.fers on cotton stalks . No doubt, this was due to the high cost of feed . Hc;wever,
t:::is could be a very expensive practice in the long run. The heifers m2.y be l oaded
'Io"iti:. DDT and other chemicals which were applied to the cotton. These are stored in
a teifer's body fat nnd remain there until she comes into production. Then the
s':::Jrec t:'.8terials are released into the milk.
"ecent experiments indicate some heifers raised on feeds containing large
.. ':::_:".:5 of chanicals resulted in concentrations RS high as 400 parts per million
.~~~'c s:c:"ec i" ~ he body. I t i;o known that animals fed a constant daily a:;:>ount of
:_: :" U:.c:t an equi librium in e to 12 ' .. ;eeks and the DDT in the body fat levels off .
:~. :> t ::!:~ ;,'ords , t he body is eliQ.inating the chemical at t he S(l~.e rate that it is
~i::l& fed. Such ani c>.als appeared perfectly hC.:llthy .
At present , the only way to detect such an animal is to have a veterinarian
5'= g ically remove a sample of body fat for analysis . This is impractical to apply
S1..-::h a procedure to all replaceoent heifers.
Researeh is being conducted to determine if a single substance Id l l be for:ned
i=. the urine that I~ill indicate the presence of DDT in body fat and its &pproximate
ccncentration. The University of California is studying the rate of elimination of
I:DT fro::! cows detected by the t est. Studies on methods for has t ening the eliminat:'
on pr:)cess are also under consideration, such as the effec t of feedi.ug green-chop ,
~arti~ l sta::vation to remove body fat, and the use of iodinated casein to stimulate
::eta:"olisl:l.
Object Description
| Title | New Mexico Dairy Herd Improvement, May, 1964 |
| Series Designation | Dairy Herd Improvement Association Monthly Report |
| Description | The monthly report of the Dairy Herd Improvement Association (DHIA) was initiated by E.E. Anderson, Extension Dairyman in the 1940s. From the 1960s forward a cooperative report had been prepared jointly by staff members of the NMSU Dairy Department, Agricultural Engineering, Agronomy, Veterinary and sent primarily to dairy herds on test (OS, DHIA, DHIR), County Extension Agents, and Instructors of Vocational Agriculture. The publication of the DHIA report was overseen by Philip Leyendecker, a director of the NMSU Agricultural Extension Service in cooperation with U.S. Department of Agriculture. The title of the report had changed over time; it had a couple of variations, New Mexico Dairy Herd Improvement and Dairy Improvement Notes. This digital collection includes historical issues published between 1961 and 1980. |
| Subject | dairy cattle (NAL); dairy farming (NAL); dairy industry (NAL); Dairy cattle--New Mexico; Dairying--New Mexico; Dairy cattle--New Mexico--Periodicals; Milk and milk products; |
| Creator | Ells, Borden; |
| Date Original | 1964-05 |
| Digital Publisher | New Mexico State University Library |
| Rights | Copyright, NMSU Board of Regents |
| Collection | NMSU Cooperative Extension Service and Agricultural Experiment Station Publications |
| Digital Identifier | UAAPdhi196405 |
| Source | Call number J87.N6 X313.99 D13; http://libcat.nmsu.edu/vwebv/holdingsInfo?bibId=24889 |
| OCLC number | 7474909 |
| Type | Text |
| Format | application/pdf |
| Language | eng |
Page Description
| Title | The Chemical Residue Problem in Replacement Heifers |
| Series Designation | Dairy Herd Improvement Association Monthly Report |
| OCR | ( ( ~ COO:Jperotive Ex tension OCT 02 1981 NEW , UNIVEf..::iJrY I THE CHEMICAL RESIDUE PROBLEM IN REPLACE~r HEIFERS - - New M fJ.1{ ico Stote U n ive rsity T:te DHIA report for Apr i l presented some questions and ans~~ers on the problem 0:: c~euri.cal resiciues. Since that report was prepared , considerable publ icity has be~D given to fourteen dairy producers i n Pennsylvania and Maryland supplying the .... -~::.icgton. D. C. , market. These producers had their permits suspencied because of a:tionable residue l evels in their milk. The offendi ng substance was heptachlor ,,;:oxide ".hieh has been taken off the appr oved chemical list since that time. This 5:;:;;4::£"0 emphasizes the seriousness of the chemical residue problem in the nation. During recent months. some New Hexico dairymen have been grazing replacement ~i.fers on cotton stalks . No doubt, this was due to the high cost of feed . Hc;wever, t:::is could be a very expensive practice in the long run. The heifers m2.y be l oaded 'Io"iti:. DDT and other chemicals which were applied to the cotton. These are stored in a teifer's body fat nnd remain there until she comes into production. Then the s':::Jrec t:'.8terials are released into the milk. "ecent experiments indicate some heifers raised on feeds containing large .. ':::_:".:5 of chanicals resulted in concentrations RS high as 400 parts per million .~~~'c s:c:"ec i" ~ he body. I t i;o known that animals fed a constant daily a:;:>ount of :_: :" U:.c:t an equi librium in e to 12 ' .. ;eeks and the DDT in the body fat levels off . :~. :> t ::!:~ ;,'ords , t he body is eliQ.inating the chemical at t he S(l~.e rate that it is ~i::l& fed. Such ani c>.als appeared perfectly hC.:llthy . At present , the only way to detect such an animal is to have a veterinarian 5'= g ically remove a sample of body fat for analysis . This is impractical to apply S1..-::h a procedure to all replaceoent heifers. Researeh is being conducted to determine if a single substance Id l l be for:ned i=. the urine that I~ill indicate the presence of DDT in body fat and its &pproximate ccncentration. The University of California is studying the rate of elimination of I:DT fro::! cows detected by the t est. Studies on methods for has t ening the eliminat:' on pr:)cess are also under consideration, such as the effec t of feedi.ug green-chop , ~arti~ l sta::vation to remove body fat, and the use of iodinated casein to stimulate ::eta:"olisl:l. |
