Ontario Sessional Papers, 1898-99, . Fig. 8. leaves have developed, there is seldom any further attack, provided the weather is dry andwarm. But the second growth of leaves so exhausts the tree that the succeeding yearscrop is light, if any. The mycelium is perennial. It passes the winter months in thetissue of the leaf buds, and in the spring grows out with the developing leaves. In thisway the disease is perpetuated from year to year. The disease spreads, no doubt, chiefly through the agency of affected buds used in budding young seedlings in the nursery. Spores are developed in asc
Ontario Sessional Papers, 1898-99, . Fig. 8. leaves have developed, there is seldom any further attack, provided the weather is dry andwarm. But the second growth of leaves so exhausts the tree that the succeeding yearscrop is light, if any. The mycelium is perennial. It passes the winter months in thetissue of the leaf buds, and in the spring grows out with the developing leaves. In thisway the disease is perpetuated from year to year. The disease spreads, no doubt, chiefly through the agency of affected buds used in budding young seedlings in the nursery. Spores are developed in asci on both sur-faces of the leaves. The number of spores in each ascus varies from four to eight. 2 17 62 Victoria. Sessional Papers (No. 18). Remedies. To secure good results from any treatment, it is well to head back thebranches in the spring,carefully removing any that were injured by the curl the previousyear, lest the mycelium, which is perennial, might spread in the neve leaves when Fig. 9 With proper pruning and spraying of fungicides it is possible to hold this disease incheck. Apply Bordeaux mixture—the first application just before the buds, the secondas soon as the trees are out of bloom, and the third, about ten days or two weeks after thesecond. With each application of the Bordeaux mixture Paris green should be used forthe curculio, at the rate of one pound to 300 gallons of the mixture. If the weather iswet, a more frequent use of the fungicide may be necessary, and an additional applica-tion can often be made with profit.—M. W. D. All of which is respectfully submitted. Guelph, Dec. 31, 1 WILLIAM LOOHHEAD, Professor of Biology and Geology 18 PA&T IV. THE REPORT OF THE DEPARTMENT OF CHEMISTRY. To the President of the Ontorio Agricultural College ; Sir,—Owing to Prof. Shuttleworths continued absence in Germany, it again becomesmy duty to report upon the work of the Chemical Department. Besides the regular class-room and laboratory wo
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