. Fig. 17.—Olpldiuni brassicae. i, zoosporangia in cells of cabbage leaf; 2, zoospores; 3, resting- spores. All highly mag. From a scientific standpoint this fungus should be recog- nised from the similar effects produced by Pythium de barya- ?tum (Hesse), although the practical preventive measures apply equally to both pests. Plenty of sunlight, and absence of excess of moisture in soil and air are the only practical remedies. Where the disease has shown itself is an indication that the locality is too damp. Woronin, Pringsh. Jahrb. (1878), p. 557. Olpidium hmnae (Schrot.). This parasite is m
. Fig. 17.—Olpldiuni brassicae. i, zoosporangia in cells of cabbage leaf; 2, zoospores; 3, resting- spores. All highly mag. From a scientific standpoint this fungus should be recog- nised from the similar effects produced by Pythium de barya- ?tum (Hesse), although the practical preventive measures apply equally to both pests. Plenty of sunlight, and absence of excess of moisture in soil and air are the only practical remedies. Where the disease has shown itself is an indication that the locality is too damp. Woronin, Pringsh. Jahrb. (1878), p. 557. Olpidium hmnae (Schrot.). This parasite is met with in the epidermal cells of the duckweed {Levina minor). Zoosporangia globose, with a long beak, 18-20 /x diam., resting-spores globose, almost colourless, 12-20 /'. diam.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
