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Hereford and Red Angus Heifers Recruited for Genomics Research

The University of Missouri is recruiting 2,500 Hereford heifers and 2,500 Red Angus heifers to participate in a heifer puberty and fertility genomic research project. Heifers should be registered Hereford, registered Red Angus, or commercial Hereford or Red Angus. Hereford x Red Angus crossbred heifers targeted for the Premium Red Baldy Program would also be a good fit for the research project. Producers must be willing to work with a trained veterinarian to collect the following data: ReproductiveTract Scores collected at a pre-breeding exam 30 to 45 days prior to the start of the breeding season. PelvicMeasurements (height and width) collected at the same pre-breeding exam 30 to 45 days prior to the start of the breeding season. Pregnancy Determination Using Ultrasound reporting fetal age in days. Ultrasound will need to occur no later than 90 days after the start of the breeding season. In addition, heifers must have known birth dates and have weights recorded eithe

ARSBC 2018: Impact of fly control on cattle performance

Brandon Smythe
New Mexico State University

Three species Smythe works on:

  • Horn flies
  • Stable flies
  • House flies


House flies become an issue when we upset our neighbors. Dairy in New Mexico dealt with litigation from their neighbors.

Everyone knows that flies are horrible.

Both horn fly males and females feed on blood. Horn flies feed 30 to 40 times a day. Stable flies feed once or twice and then find a place to rest. Horn flies almost never leave a cow. Only time they leave is to lay eggs on a manure patch.

There can be 200 to 1000 flies per animal. Flies are reproductively efficient. Flies lay 10 to 200 viable eggs per female. This reproduction efficiency allows for population surges.

Horn flies are a warm weather pest, thus during cattle breeding and growing. Flies go dormant in winter months.

Horn flies reduce performance in feed efficiency, growth and milk production. Horn flies are number one in causing production losses.
We see a $5 to $8 return for every $1 we spend on fly control.
We need to interven when we see >200 flies per animal.

Horn flies don't affect reproductive outcomes.

We need to rotate fly control methods. Need to have seasonal rotations, and even better is intra-seasonal rotations. If you notice that flies are coming back earlier than the previous year, you probably need to rotate fly control method.

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