. Carnegie Institution of Washington publication. SMITH'S DISEASE OF AMARANTHS. This disease of amaranths was discovered by the writer in October 1897, in a neglected garden at Mumford, New York. The plants were weeds standing on what had been a cab- bage seed-bed. They were small and seemed to have dried up when half grown. There was no surface indication as to the cause of the disease. The stems were browned internally and there were cavities in the parenchyma in the region of the vascular ring. These cavities were full of bacteria. They were small, actively motile rods with rounded ends. Fu
. Carnegie Institution of Washington publication. SMITH'S DISEASE OF AMARANTHS. This disease of amaranths was discovered by the writer in October 1897, in a neglected garden at Mumford, New York. The plants were weeds standing on what had been a cab- bage seed-bed. They were small and seemed to have dried up when half grown. There was no surface indication as to the cause of the disease. The stems were browned internally and there were cavities in the parenchyma in the region of the vascular ring. These cavities were full of bacteria. They were small, actively motile rods with rounded ends. Fungi were not observed. There was an abundance of the diseased plants, but unfortunately only a small amount of material was collected and the disease has not come again under my observation. No plate cultures were made, but the organisms taken from the interior of two stems were streaked on four tubes of Loeffler's blood-serum—all that happened to be avail- able. It was my intention to keep the organism alive and make some inoculations, but during a winter crowded too full of other duties the cul- tures were allowed to die. The organism may be known as Bacterium ama- ranthi (syn. Pseudomonas amaranthi), but my knowl- edge of it is very incomplete. The bacteria made at first a dirty white or pale yellowish-white, wet growth on the slant tubes of Loef- fler's blood-serum. This subsequently became a yel- low growth, and there was a rather copious yellow pre- cipitate in the fluid at the bottom of the V. At first the growth was slower and looked unlike that of Bacterium campestre, but afterward on this medium the color was the same or very nearly the same. No liquefaction was observed. ()n potato cylinders which were inoculated from a single pale yellow colony on the side of the streak in one of the tubes of blood-serum, the manner of growth and the amount of growth closely resembled that of Bacterium hyacinthi, but the color was quite different. The growth on the potato was homo
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