Pearl Snaps

Stories of a cowgirl living life by her own lights


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Forage Facts: Hay for Horses

I am amazed sometimes at the lack of knowledge some horse owners possess about what they are feeding their horses. An example of this was a recent story a friend of mine from El Paso, Texas, shared with me a few weeks back about the manager at her boarding stable. My friend purchases her own hay for her horses and had just gotten a good deal on some bermudagrass hay. The manager of this facility proceeded to inform her that the hay she had purchased was of poor quality and even thought that it may be straw.  At this particular stable, all horses are fed alfalfa hay. The manager had no idea what quality grass hay looked like or even was. They just assumed that all horses should eat alfalfa hay.

I’m not saying that alfalfa hay is bad for horses. I just fi nd it disturbing that someone managing a stable would not have even a small knowledge of the different types of forages available for horses. I’ve come across this many times in my many encounters with horse people over the years.

I feel that this issue merits a need on the part of the horse industry, equine educators, veterinarians, etc., to work with horse owners to better understand the basics of forages to better enable owners to make more sound decisions about their horse’s nutritional needs. Through providing knowledge we will hopefully leave the horse industry a better place.

The different types of hay available are going to vary by the particular varieties grown in your area. Take for example, the southern United States where coastal bermudagrass, a warm-season grass is popular forage because it is well adapted to the warm, humid climate. Bermudagrass is rarely found in the northern U.S. because it does not grow well in cool climates. Where I live in Kentucky, the most popular hay choices are alfalfa, timothy, Orchardgrass, and alfalfa-grass mixes. If you’re not familiar with different types of grasses or legumes I suggest consulting your local extension agent. There are also many useful websites available from land grant universities that offer useful forage identification resources.

When choosing hay for your horses there are several factors that need to be taken into account. Most importantly is that the hay is clean hay. If dust and mold are present, respiratory tract problems may develop. Digestive upsets are also a possible occurrence of presence of mold. Another thing that should be taken into account is the nutritive value of the hay you are getting. I think many times owners buy hay completely off the precedent of the color or smell of the hay (i.e. greener is better). Though color and smell do play a part in the final nutritive value, it is a small one. By doing a forage analysis you can save you a lot of time and money in the long run in your nutritional program.

Remember also that not all horses will have the same nutrient needs, so of course, they will not all need to eat the same kind of hay. For example, a racehorse may require nutrient dense forage like alfalfa because of a demanding exercise regime, while a backyard pony can maintain an ideal weight on mature grass hay. Hay will not always provide a nutritionally balanced diet, so it is important to understand your horse’s nutrient and energy requirements and adjust the diet accordingly by changing the quality of forage or adding a concentrate supplement.  For help in formulating a nutritionally balanced feed program for your horse contact your veterinarian or equine nutritionist.

This article was originally featured as my monthly Horse Care column for Tack ‘n Togs. You can access the pdf version here.


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Forage Facts: Potato Leafhoppers

Potato leafhopper (Empoasca fabae) is a major pest of alfalfa and other legume forage crops.  In Pennsylvania, it causes over $15 million in average losses annually.  It reduces yields, quality (especially lower protein content), and stand longevity. The stress leafhoppers trigger has increased root rot and stand failures. This damage is especially evident in new seedings.

Leafhopper nymphs and adults feed on the undersides of the leaves.  By extracting the sap, they cause stunting and leaf curl, as well as a yellowing of leaf tissue known as “hopper burn.”  This discoloration is caused by injection of a toxic substance into the leaf tissue.  “Hopper burn” is characterized by a yellowing of the tissue at the tip and around the leaf margin which continues to increase until the leaf dies.  Many times this can be confused with drought stress.

Leafhoppers overwinter in the southern Gulf states and migrate north in the spring.  After mating, eggs are laid inside the veins on the underside of leaves. A female leafhopper lives about a month, producing only 6 eggs a day.  Eggs hatch in about 10 days, nymphs mature in about 2 weeks, and begin feeding on leaf tissue.  Mating occurs about 48 hours after maturation.  As many as 3-4 generations can be produced in one year.

For more information on when and how to sample your forage stand for potato leafhoppers and how to determine your economic injury threshold, visit Penn State’s Entomology website.

Options for control of potato leafhopper available in today’s market are insecticides and recently, new varieties of leafhopper-resistant alfalfa. To read more about chemical control options, you can consult this University of Delware publication or the Penn State Agronomy Guide.


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Forage Facts: Alfalfa Weevil

Alfalfa weevil (Hypera postica) can be a major problem insect in the first cutting of alfalfa.  This insect is one of the primary defoliators of alfalfa.  The alfalfa weevil was introduced into the United States from southern Europe and was first found in 1904 in Utah.  It can be found in all 48 mainland states today.  Alfalfa weevil along with it’s other insect counterpart, the potato leafhopper, are responsible for hundereds of millions of dollars in losses annually for farmers.  It is estimated that a 10-15% reduction in yield alone (not considering forage quality) can be seen from alfalfa weevil damage.

Adult weevils lay eggs in the stems and stubble of alfalfa plants in the Fall.  The eggs overwinter and hatch in early spring.  Spring laid eggs hatch immediately.  The larvae stage lasts approximately 3 weeks followed by the spinning of a cocoon.  The larvae remains in the cocoon for about 10 days and upon emergence is a fully mature adult weevil.  During mid-summer adults become inactive.

The larvae feed within the growing tips of the alfalfa plant, on the upper leaves as they emerge, and later on lower leaves.  Eventually plants become skeletonized from feeding and leaves die, giving the field a frosted appearance.  Larvae may also feed on new emerging shoots and can severely inhibit regrowth after cutting.  Adult weevils feed on the entire alfalfa plant.  Conditions that favor pest development are excessive pesticide use (which destroys biological control agents), mild winters, and warm dry spring weather.

Methods to control alfalfa weevil include management practices, biological agents, and pesticides.  Management practices that maximize alfalfa growth will minimize the effect of alfalfa weevils.  Several species of parasitic wasp and a fungus exist that will help control alfalfa weevil populations biologically.  If infestation levels are above the economic threshold, pesticides must be used, but always remember that insecticides kill beneficial insects too!

To sample for alfalfa weevil in your stand you can take the following steps:

  1. Collect 30-50 stems randomly from throughout the field.
  2. Shake larvae out of stems. Open young leaves to dislodge young larvae.
  3. Count larvae.
  4. Determine average length of stems.
  5. Use charts below to determine if control is warranted.

via Penn State Entomology

For more in-depth descriptions of life cycle, crop injury, crop scouting techniques, and crop management please consult the following links:

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