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In page Delta Theta Sigma:

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The Delta Theta Sigma idea was contagious, not only at The Ohio State University but also on many other agricultural college campuses throughout the Midwest.[1] Within a few years chapters had been organized on ten other campuses.[1] At a national convention in 1912, all of the chapters except the original chapter at Ohio State University voted to make Delta Theta Sigma an agricultural honorary fraternity.[1] The local chapter at The Ohio State University retained the original name, Delta Theta Sigma.[1] The other ten chapters, therefore, assumed the name, Gamma Sigma Delta.[1]