Revised Grades and Requirements for Field Tomatoes 1. Application These standards apply to field-grown tomato varieties derived from Lycopersicum esculentum that are cultivated in open-field conditions and not under permanent artificial protection such as glasshouses or covered structures, except during the early stages of growth. These requirements do not apply to cherry tomatoes. Field tomatoes are classified under the following grades: Canada No. 1 Canada No. 2 3. Requi...