. Fio. 69.—Sphaerotheca jtannosa on Peach. The mycelium and conidiophores are shown on the epidermis of a leaf. (After Tulasne.) Kose-mildew is propagated during summer by ovoid, vuii- cellular conidia abjointed in acropetal series from erect conidio- phores. The perithecia have short simple appendages, and contain elliptical spores. The disease may be combated by " sulphuring "; according to liitzema-Bos, spraying with Bordeaux mixture has also shown good results.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897