. Fig. 63. Black-rot spots fiilargccl to show the pycnidia. After Anderson. with the fungus, kill it. Below the temperature at which sulfur is effective the fungus will make but Httle progress. When the air, shade temperature, is from 32° to 35° C. (90° to 95° F.), the killing effect of the sulfur may be seen within 24 hours; if above 38° C. (100° F.), one or two days are suf- ficient to rid the vineyard of the disease. The sulfur must be distributed to every part of the vine. Sulfur upon the ground is of no use. The vines should be dusted from one to seven times, according to conditions, susc
. Fig. 63. Black-rot spots fiilargccl to show the pycnidia. After Anderson. with the fungus, kill it. Below the temperature at which sulfur is effective the fungus will make but Httle progress. When the air, shade temperature, is from 32° to 35° C. (90° to 95° F.), the killing effect of the sulfur may be seen within 24 hours; if above 38° C. (100° F.), one or two days are suf- ficient to rid the vineyard of the disease. The sulfur must be distributed to every part of the vine. Sulfur upon the ground is of no use. The vines should be dusted from one to seven times, according to conditions, susceptibility, climate, etc. The first sulfuring should be done when the blossoms
Size: 2641px × 1892px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
