Select-A-Herb uses several abbreviations and words that may require definition. Below are several words and abbreviations that you may encounter in these tools.
A - B - C - D - E - F - G - H - I - J - K - L - M - O - P - Q - R - S - T - X - U - V - W - X - Y - Z
a.e. This is an abbreviation for "acid equivolent". The active ingreadientce of seveal herbicides can be formulated several different ways. In some cases, the active ingredient is formulated as a salt. This allows the ingedience to go into water better or aids in moving into the plant. When comparing different products with the same active ingredient it a.e is often used to refer to the basic herbicide molecule.
  ai The abbreviation 'ai' is used for 'active ingredient.' This is the component of the herbicide that has the herbicidal activity. This active ingredient may be formulated in several differen ways. Many herbicides come with inert ingredients that aid in absorbtion, mixing, etc. These inert ingredients are not included when "ai" is used.
Basal A basal applicatin or often refered to as basal bark application, is an applicaiton of the herbicide to the lower 18 inches of a woody stem or tree trunk. The herbicide soaks through the bark and into the cambiam. This is a common applicaiton method used to control woody species.
  Broadcast A broadcast application is an applicaton where the herbicide is applied indiscrimenetly over the vegetation. In many cases this involves a boom and tractor application equipment. All species suseptable to the herbicides being applied can be damaged.
Cut Stump A cut stump application is applied to the cut surface of the stump. It is most effective when the stem is sprayed within 1 hour of cutting. In the case of woody species it is imparitive that the herbicide is appied to the cambium layer. This is an outer ring just under the bark which contains most of the tree's vascular tissue (gray area on figure).
Girdle & Frill A herbicide applicaiton were cuts are made at 1 inch intervules around the stem of a woody plant then a herbicide is sprayed into the open cuts. This introduces the herbicide to the woody species' cambium. Girdle and Frill
  Gal An abreviation for gallons
fl oz/A Fluid ounces per acre
Hand-Held Spot and foliar applications made with spray cannesters and/or back pack application equipment. Herbicide is generally applied to the foliage. Foliage is generally thourowly covered but not to the point where it starts to run off the leaves. These often put out high volumes.
Injection This application proceedure uses specific equipment designed to inject the herbicide directly into the plant. It is most commonly used for woody plants, trees, and shrubs. In most cases it is recommended that the injections be done aound the tree at 1 inch intervals.
POST The abreviation of postemergence. An applicaiton performed after either the emergence of the weed or crop. If it appears in the 'Site Timing' column then it refers to before the crop or desired plant. If it appears in the 'weed size' column then it refers to what you are trying to control.
  PRE An abreviation of postemergence. An applicaiton performed before either the emergence of the weed or crop. If it appears in the 'Site Timing' column then it refers to the crop or what you are wishing to grow. If it appears in the 'weed size' column then it refers to what you are trying to control.
Spot These applications or done on isolated small areas. Some labels specify that 1/10 of an acre constitutes a 'spot' applicaiton. They are often applied by back packs or sprayer mounted on allterain vehicles. In most cases labels will provide a volume to volume (v/v) percent rate. In other cases a per acre rate may be provided.
v/v Some labels provide rates in volume per volume quantities.

Ex. A 3% v/v allows you to calculate the amount depending on how much of carrier you are using. If you are using a 2 gallon mix do the following:

3% divided by 100 = 0.03, so 0.03 x 2 gallons = 0.06 gal, which is (0.06 x 128 = 7.68) 7.68 floz in 2 gal.


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