Field resistance

Resistance that is apparent in the field but not in the laboratory. This vague term has been widely misused and is best avoided. It is sometimes used, incorrectly, as a synonym for horizontal resistance. See also: Tolerance. Field screening

A screening operation that is conducted in the field, as opposed to the greenhouse, or the laboratory. Because of the necessity for on-site selection, amateur breeders working with horizontal resistance should always employ field screening, except for a final laboratory screening for certain aspects of quality, which cannot be determined in the field.

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