. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. SPHAEROTHECA 147 dispersed by wind, rain, insects, birds, etc., and each one that ahghts on a young, growing part of a gooseberry bush is capable of infecting the plant, and starting a new centre of disease. This mode of infection may continue until late in the autumn, under favourable weather conditions, or. Fig. 37.—Sphaerotheca mors-uvae. 1, showing mildew on leaf and fruit ; 2, winter stage on a shoot ; 3, perithecium or winter fruit; 4, ascus con- t
. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. SPHAEROTHECA 147 dispersed by wind, rain, insects, birds, etc., and each one that ahghts on a young, growing part of a gooseberry bush is capable of infecting the plant, and starting a new centre of disease. This mode of infection may continue until late in the autumn, under favourable weather conditions, or. Fig. 37.—Sphaerotheca mors-uvae. 1, showing mildew on leaf and fruit ; 2, winter stage on a shoot ; 3, perithecium or winter fruit; 4, ascus con- taining spores ; 5, a chain of conidia or summer fruit ; 6, conidia showing fibrosin bodies in their interior; 7, a branch that has been injured by aphides (green fly) at the tip. The recurved spines and brown colour are characteristic. Figs, i, 2, and 7, nat. size ; remainder highly mag. when an autumnal expansion of buds follows early pruning. As the season advances the white mildew, which at first resembles in general appearance the well-known hop mildew, and rose mildew, becomes denser in substance, more especi- ally on the fruit and shoots, changes to a dingy brown colour, and becomes studded with the dark-brown perithecia or. 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 Massee, George, 1850-1917. New York : Macmillan
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
