. Bakterien in Bezug auf Pflanzenkrankheiten. Bakteriologie; Pflanzenkrankheiten. Willst von KÜRBISGEWÄCHSEN. 265 Zwei weiter unten Die pilzentwicklung Blatt. Der Rest waren normal. Der fünfundzwanzigsten Tag der Apikalen 10 Zoll, darunter drei Internodien unterhalb der Gestochenen Blatt trocken waren - Runzelig. Die wirst langsam zur Verlängerung nach unten. Ein weiteres großes Blatt - Blade, der vierte, hatte Ungleichförmigkeitsgrad-drehzahlregler für den vorhergehenden Tag. Weiter unten wurden fünf gute Blätter getrennt durch lange Internodien. Die stammzellen horizontal war. Die ganze Weinstock schließlich verdorrte auf den Boden. (246.) Gurke. Der achte Tag (10 Uhr) gab es willst des Apex und die Ränder der

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. Bacteria in relation to plant diseases. Bacteriology; Plant diseases. WILT OF CUCURBITS. 265 two next below the pricked leaf. The rest were normal. The twenty-fifth day the apical 10 inches including three internodes below the pricked leaf were dry-shriveled. The wilt was slowly extending downward. Another big leaf-blade, the fourth down, had drooped the preceding day. Farther down were five good leaves separated by long internodes. The stem was horizontal. The whole vine finally shriveled to the ground. (246.) Cucumber. The eighth day (10 a.m.) there was wilt of the apex and margins of the pricked leaf, extending outward mostly from the groups of pricks, involving 10 to 12 sq. cm. The leaf was 4 inches broad. There had been no wilt up to the preceding afternoon, therefore the period of incuba- tion was nearly eight days. The tenth day the terminal three-fourths of the pricked blade had wilted and was a dull yellowish green (it was more green than yellow but looked faded). The petiole and remaining leaves were normal. By January 16 the blade of the pricked leaf had shriveled. The upper half of the petiole was flabby and the extreme upper end was shriveling. The terminal six leaves (6 inches of stem) had wilted and also the blade of the first leaf down, the separating internode being 4 cm. long. The rest were normal. The twenty-first day the upper half of the vine had wilted. It was now brought into the laboratory and by direct transfer four slant agar-cultures were made from it (tubes I to 4, January 21, 1896) as follows: No. I from base of wilted part of stem (interior) ; No. 2 from interior of a young shriveling fruit near the top of the vine; No. 3 from middle of wilted part of the stem which had begun to shrivel; No. 4 from interior of stem not far from the lowest external sign of wilt (in leaf) and where the stem was sound externally but sticky within. Nos. I and 4 yielded pure cultures of Bacillus tracheiphilus. (247.) Squash. Groups of pricks were made on a

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