. Bacteria in relation to plant diseases. Bacteriology; Plant diseases. 242 BACTERIA IN RELATION TO PLANT DISEASES. (87.) Hubbard squash. This was a very thrifty vine, about 16 inches high, with 6 good leaves. About 50 pricks were made on the middle and apical part of the blade of the fourth leaf which was about 4 inches broad. The eighteenth day there "was no sign of the blight. On February 27 the vine was entirely dried up but an examination of the stem showed no bacilli in the vessels or the parenchyma. The Hubbard squashes were planted October 31 and were in small pots. (88.) Summer c
. Bacteria in relation to plant diseases. Bacteriology; Plant diseases. 242 BACTERIA IN RELATION TO PLANT DISEASES. (87.) Hubbard squash. This was a very thrifty vine, about 16 inches high, with 6 good leaves. About 50 pricks were made on the middle and apical part of the blade of the fourth leaf which was about 4 inches broad. The eighteenth day there "was no sign of the blight. On February 27 the vine was entirely dried up but an examination of the stem showed no bacilli in the vessels or the parenchyma. The Hubbard squashes were planted October 31 and were in small pots. (88.) Summer crookneck squash. This vine was about i foot high and had 4 good leaves: 75 pricks were made in the blade of the second leaf which was about inches broad. The wilt did not appear. February 27 the vine was wholly dried up but no bacilli were found in the vessels or in the parenchyma. (89.) Summer crookneck squash. This vine was about a foot high and had 4 good leaves: 60 pricks were made on the blade of the second leaf which was about 2 inches broad. February 6 the vine was nearly dried up. There was not a trace of bacteria in the stem. Three shoots in a 3-inch pot sufficiently explains the early death of the plant. (go.) Potato {Solatium tubernsum). A shoot about 16 inches high was selected for inoculation. Many pricks were made in the middle and upper part of the stem over a distance of about 8 inches. Two leaflets were pricked may times also. No sign of disease appeared on shoot or leaves. On February 6 the vine was brought into the laboratory and examined. It was still green and there was no trace of bacteria in the stem. (91.) Cucuvabex {Cucuniis sativus). This vine, which was about 16 inches high, was rather badly mildewed at the time of inoculation and some aphides were present. The first and second leaves had shriveled from the mildew. Six good leaves remained. The blade of the fourth leaf which was about inches broad was pricked many times. At II a. m. the eight
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