. Fig. 2.—Spore pustules of rust on asparagus tops. choke," p. 7 ; "Wet Rot" under "Beet," p. 23; "Root Rot" under "Cruci- fers," p. 42; and other diseases caused by species of Phytophthora.) A satisfactory method of disinfecting the water used for washing aspara- gus has not been found. Rust.—The principal symptom of this disease is a dusty, red rust of the bushy tops which grow up each year after the asparagus cutting stops (fig. 2). Such tops when disturbed give off clouds of red dust, which consists of spores of the fungus Puccinia asparagi. The
. Fig. 2.—Spore pustules of rust on asparagus tops. choke," p. 7 ; "Wet Rot" under "Beet," p. 23; "Root Rot" under "Cruci- fers," p. 42; and other diseases caused by species of Phytophthora.) A satisfactory method of disinfecting the water used for washing aspara- gus has not been found. Rust.—The principal symptom of this disease is a dusty, red rust of the bushy tops which grow up each year after the asparagus cutting stops (fig. 2). Such tops when disturbed give off clouds of red dust, which consists of spores of the fungus Puccinia asparagi. The rust pustules afterward turn black. The tops die prematurely and the plants are weak- ened more and more each year, which reduces the yield and shortens the
Size: 1780px × 2808px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectagriculturalpests, booksubjectplantd
