For a number of years the three industries of seed growing, canning, and trucking, through their national organizations, have discussed the need for accurate descriptions of the important varieties in the crop plants with which they are concerned.

This publication is a revision of the third in a series called Market Diseases of Fruits and Vegetables. The series is designed to aid in recognition and identification of pathological conditions of economic importance affecting fruits and vegetables in the channels of marketing, in order to facilitate the market inspection of these food products and to prevent losses from such conditions.