The common affection of various grasses, commonly known as “Silver-top,” has received the attention of such well-known investigators as Professors Comstock, Lintner, Forbes, Fletcher and others, and it is not with the expectation of completely solving the problem which has perplexed these careful students that I venture to present my experience, but in the hope that by comparisons of experience and observation we may arrive at a better knowledge of a subject at once important and complex.