. Circular. Agriculture -- Massachusetts. Circular No. 52 (Revision of No. 41; March, 1915. MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION. AMHERST. THE CONTROL OF ONION SMUT. By George E. Stone. Onion smut has been known in Massachusetts for about forty years, Mr. Benjamin P. Ware having referred to the injury caused by this fungus in the Massachusetts State Board of Agriculture Report for 1869"—70. The smut spores infect the seedlings at a very early stage, the disease taking the form of dark-colored or sooty masses, and as the onion matures the black areas of pustules may be noticed on
. Circular. Agriculture -- Massachusetts. Circular No. 52 (Revision of No. 41; March, 1915. MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION. AMHERST. THE CONTROL OF ONION SMUT. By George E. Stone. Onion smut has been known in Massachusetts for about forty years, Mr. Benjamin P. Ware having referred to the injury caused by this fungus in the Massachusetts State Board of Agriculture Report for 1869"—70. The smut spores infect the seedlings at a very early stage, the disease taking the form of dark-colored or sooty masses, and as the onion matures the black areas of pustules may be noticed on the leaves and bulbs. Since infection takes place in early stages of the seedling, onion sets being immune, any method which will kill the spores on the seed or in the soil must be beneficial. Where onions are grown year after year on the same land the smut shows a marked tendency to increase, but even here it can be controlled by the use of proper preventive Fic. I. Showing" Planet Jr. cultivator with formalin drip. Positive results have been obtained by applying sulfur thoroughly mixed with air-slaked lime in the drills, at the rate of 100 pounds of sulfur and 50 pounds of lime to the acre. Ground lime, drilled in. 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 Massachusetts Agricultural Experiment Station; Massachusetts Agricultural Experiment Station. Special circular. Amherst
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