. Manual of fruit diseases . Fruit. 240 MANUAL OF FRUIT DISEASES withers, turns brown or red, and finally shrivels into a mummy (Fig. 63). Diseased fruits shell very easily. Cause. The downy-mildew pathogene is a fungus, Plasmopara Viticola. It has both a sexual and an asexual stage, the former 11^^. Fig. 63. — Downy-mildew on grape-berries. represented by oospores, the latter by conidia. It is generally agreed that the oospores carry the fungus through the winter in the old fallen leaves. In the spring these oospores germinate, forming a conidiophore, on which is borne another spore, a conidi
. Manual of fruit diseases . Fruit. 240 MANUAL OF FRUIT DISEASES withers, turns brown or red, and finally shrivels into a mummy (Fig. 63). Diseased fruits shell very easily. Cause. The downy-mildew pathogene is a fungus, Plasmopara Viticola. It has both a sexual and an asexual stage, the former 11^^. Fig. 63. — Downy-mildew on grape-berries. represented by oospores, the latter by conidia. It is generally agreed that the oospores carry the fungus through the winter in the old fallen leaves. In the spring these oospores germinate, forming a conidiophore, on which is borne another spore, a conidium. The conidium in turn, at maturity, germinates, but instead of forming a germtube, its contents break up into. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hesler, L. R. (Lexemuel Ray); Whetzel, Herbert Hice, 1877-1944. New York : Macmillan
Size: 1618px × 1544px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
