Butte County
University of California
Butte County

Betsy M. Karle

Photo of Betsy M. Karle
Area Dairy Advisor & County Director
Cooperative Extension Glenn County
PO Box 697, 821 E. South Street
Orland, CA 95963
(530) 865-1156
bmkarle@ucanr.edu Create VCard

Also in:
Butte County
Tehama County
Shasta County
Sutter-Yuba Counties


M.S. Ecology, UC Davis. 2003
B.S. Agriculture Systems & Environment, UC Davis. 1999


Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Maier, G.U; Rowe, J.D., et al. (In Press). Development of a novel clinical scoring system for bovine respiratory disease in weaned dairy calves. Journal of Dairy Science.
  • Maier, G.U; Love, W.J., et al. (In Press). Management factors associated with bovine respiratory disease (BRD) in preweaned calves on California dairies: the BRD 100 study. Journal of Dairy Science.
  • Miller, Christine M.; Heguy, Jennifer M., et al. (In Press). Optimizing accuracy of sampling protocols to measure nutrient content of solid manure. Waste Management.
  • Karle, Betsy M.; Maier, Gabriele U., et al. (In Press). Regional management practices and prevalence of bovine respiratory disease in California's preweaned dairy calves. Journal of Dairy Science. https://www.journalofdairyscience.org/article/S0022-0302(18)31007-5/fulltext
  • Meyer, D.; Karle, B.M., et al. (In Press). UC-Industry-Agency partnerships key to success in dairy water quality policy. California Agriculture.
  • Li, X.; Jackson, W., et al. (2019). A Cross-Sectional Study of prevalence and Species of Cryptosporidium spp. in Preweaned Calves and Associated Management Risk Factors on Dairies in Central California, USA. J Vet Med Res. 6:1, 1171-1180. January 24. https://www.jscimedcentral.com/VeterinaryMedicine/veterinarymedicine-6-1171.pdf
  • Tempini, PN; Aly, SS, et al. (2018). Multidrug residues and antimicrobial resistance patterns in waste milk from dairy farms in Central California. Journal of Dairy Science. 101:9, 8110-8122. September 1, 2018.
  • Miller, Christine M.; Fadel, James G., et al. (2018). Optimizing accuracy of protocols for measuring dry matter and nutrient yield of forage crops. Science of the Total Environment. 624, 180-188. May 15, 2018.
  • Love, W. J.; Lehenbauer, T. W., et al. (2016). "Survey of management practices related to bovine respiratory disease in preweaned calves on California dairies." Journal of Dairy Science 99(2): 1483-1494.
  • Davy, J.S.; Karle, B.M., et al. (2015). "Broadleaf weed control in irrigated pasture containing Trifolium repens." Crop and Pasture Science 66: 985-991.
  • Meyer, D.; Price, P., et al. (2011). "Survey of dairy housing and manure management practices in California." Journal of Dairy Science 94: 4744-4750.
  • Harter, T.; Atwill, E.R., et al. (2008). "Developing risk models of Cryptosporidium transport in soils from vegetated, tilted soil box experiments." Journal of Environmental Quality 37: 245-258.
  • Lewis, D.J.; Atwill, E.R., et al. (2005). "Linking on-farm dairy management practices to storm-flow fecal coliform loading for California coastal watersheds." Environmental Monitoring and Assessment 107: 407-425.
  • Lile, D.; Tate, K.W., et al. (2003). "Stubble height standards for Sierra Nevada meadows can be difficult to meet." California Agriculture 57: 60-64.
  • Atwill, E.R.; Hou, L., et al. (2002). "Transport of Cryptosporidium parvum oocysts through vegetated buffer strips and estimated filtration efficiency." Applied and Environmental Microbiology 68: 5517-5527.

Non-Peer Reviewed

  • Martins, J.P.; Karle, B.M. (2018). Dairy needs assessment results. California Dairy Newsletter. 10:2, 7. May 2018. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter75156.pdf
  • Pereira, Richard; Tempini, Paolo, et al. (2018). Feeding Waste Milk to Calves: Reducing Antimicrobial Resistance. California Dairy Newsletter. 10:2, 2. May 2018. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter75156.pdf
  • Karle, Betsy; Aly, Sharif (2018). Improved Detection and Management Reduces Respiratory Disease in Dairy Calves. California Dairy Newsletter. 10:1, 5. February 2018. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter73750.pdf
  • Karle, Betsy (2017). Disbudding with Caustic Paste. California Dairy Newsletter. 9:3, 3. July 2017. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter70312.pdf
  • Karle, Betsy (2017). Research Roundup: Prevalence of Salmonella in Cull Cows in California. California Dairy Newsletter. 9:2, 1-2. April 2017. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter68983.pdf
  • Karle, Betsy (2017). There's an App for that! Respiratory Disease in Dairy Calves. California Dairy Newsletter. 9:1, 6. January 2017. http://ceglenn.ucanr.edu/newsletters/Dairy_Newsletter67331.pdf
  • Heguy, J. M.; Karle, B.M., et al. (2016). First Golden State Dairy Management Conference a Success- California Research for California Farmers. California Dairy Newsletter. 8:2, 1. April 2016.
  • Karle, B.M. (2016). Jumpstart Your Calves. California Dairy Newsletter. 8:2, 6. April 2016.
  • Karle, B.M. (2016). Jump-Start your calves. Progressive Dairyman. May 24, 2016.
  • Karle, B.M. (2016). Pneumonia in dairy calves. Glenn County Farm Bureau Newsletter. February 2016.
  • Karle, B.M. (2016) Pneumonia Prevalence in Pre-weaned Dairy Calves. Dairy Herd Management
  • Karle, B.M. (2015). Antibiotics on Dairies: Change is Coming. California Dairy Newsletter. 7:3, 1. August 2015.
  • Karle, B.M. (2015). Best Management Practices for Silage Harvest. Glenn County Farm Bureau Newsletter. August 2015.
  • Karle, B.M. (2015). Bovine respiratory scoring system for pre-weaned dairy calves.
  • Karle, B.M. (2015). Evitando los Residuos de Medicamentos (Avoiding Drug Residues). California Dairy Newsletter. SPECIAL EDITION, 2. December 2015.
  • Karle, B.M. (2015). Pneumonia Prevalence in Pre-weaned Dairy Calves. California Dairy Newsletter. 7:4, 5.
  • Karle, B.M. (2015). Pneumonia Prevalence in Pre-weaned Dairy Calves. California Dairy Newsletter. 7:4, 5. October 2015.
  • Karle, B.M.; Dubrovsky, S.A., et al. (2015). Prevalence of bovine respiratory disease in pre-weaned calves in Northern California. American Dairy Science Association, Orlando, FL.
  • Karle, B.M.; Dubrovsky, S.A., et al. (2015). Prevalence of bovine respiratory disease in pre-weaned calves in Northern California. UC ANR Strategic Initiatives Conference, Sacramento.
  • Karle, B.M. (2015). Prevalence of Bovine Respiratory Disease in Pre-Weaned Dairy Calves in Northern California. http://ceglenn.ucanr.edu/Dairy/Calves/, University of California.
  • Karle, B.M. (2015). UC Cooperative Extension in Glenn County: Our roots and our future. Glenn County Farm Bureau Newsletter. February 2015.
  • Karle, B.M. (2015). UCCE in Your Community. Buy Fresh, Buy Local: The Eater's Guide to Local Food, North Valley Region. May 2015.
  • Karle, B.M.; Love, W.J., et al. (2014). A Survey of Calf Rearing Practices on California Dairies [abstract]. 47th American Association of Bovine Practitioners Annual Meeting, Albuquerque, NM.
  • Karle, B.M. (2014). Avoiding Drug Residues. California Dairy. December 2014.
  • Karle, B. M. (2014). Avoiding Drug Residues. California Dairy Newsletter. 6:2, 1. April 2014.
  • Karle, B. M.; Love, W.J., et al. (2014). Bovine Respiratory Disease in Dairy Calves- Diagnostic Tools and Management Practices. California Dairy Newsletter. 6:4. November 2014.
  • Karle, B.M. (2014) Feeding Your Project Calf.
  • Tate, K.W.; Dahlgren, R.A., et al. (2014). Management Practices to Improve Water Quality on Central and Western Rangelands. NI R 14-03 Supplemental Paper.. Duke University. Durham, NC.
  • Karle, B. M. (2014). Promote Your Product. California Dairy Newsletter. 6:1, 2. January 2014.
  • Karle, M.S.; Karle, B. M. (2013). Are you Implementing AVMA's new Euthanasia Guidelines? California Dairy Newsletter. 5:2, 2. August 2013.
  • Karle, B. M. (2013). Es ahora el momento para revisar el freestall? (Time for a Freestall Check?). California Dairy Newsletter- Spanish Edition. January 2013.
  • Karle, B. M. (2013). Feeding Calves on a Higher Plane of Nutrition. California Dairy Newsletter. 5:1, 1-2. March 2013.
  • Karle, B.M. (2012). Do You Need to be in the ILRP? California Dairy Newsletter. 4:1, 8. February 2012.
  • Karle, B. M. (2012). Save Money by Sticking to Protocols. California Dairy Newsletter. 4:4, 4. November 2012.
  • Karle, B.M. (2012). Time for a Freestall Check? California Dairy Newsletter. 4:3. August 2012.
  • Karle, B.M. (2011). Summer Silage Sampling Reminders. California Dairy Newsletter. 3:3, 2-3. August 2011.
  • Heguy, J. M.; Karle, B. M., et al. (2010). "Calculating field nutrient removal rates to comply with General Order for Existing Milk Cow Dairies from California's Central Valley Regional Water Quality Control Board." Journal of Dairy Science 93: 412-412.
  • Heguy, J. M.; Karle, B. M., et al. (2010). Research Update: Variability in Dry Matter Content of Harvested Corn for Silage. California Dairy Newsletter. 2:3, 4. August 2010.
  • Karle, B. M. (2010). Sterile Milk Sampling. California Dairy Newsletter. 2:5, 5. November 2010.
  • Karle, B. M. (2009). Calf Feeding Notes. California Dairy Newsletter. 1:3, 6. July 2009.
  • Meyer, D.; Price, P., et al. (2009). Evaluating Dairy Facility Options in the Central Valley. California Dairy Newsletter.
  • Karle, B. M. (2009). Prevent Residue Violations in Animals from Your facility. California Dairy Newsletter. 1:4, 3. November 2009.
  • Silva del Rio, N.; Kistler, P., et al. (2009). Survey of Tail Docking Practices in California Dairies. California Dairy Newsletter. 1:2, 3. May 2009.

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