. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICFI CAUSE PLANT DISEASE 45 strict!}' intercellular. Wound inoculations in muskmelon generally gave complete decay in from three to seven days. Similar inocula- tion of citron and cucumbers resulted in decay, though inoculation into squash did not. No decay of musk- melon followed applications of the bacteria to unbroken surfaces. B. mycoides Flugge. (Group number 8-.) Rods thick, x n, usually in long threads, sporiferous. Spores elliptical, X mm. Gelatine colonies white with mycelium
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICFI CAUSE PLANT DISEASE 45 strict!}' intercellular. Wound inoculations in muskmelon generally gave complete decay in from three to seven days. Similar inocula- tion of citron and cucumbers resulted in decay, though inoculation into squash did not. No decay of musk- melon followed applications of the bacteria to unbroken surfaces. B. mycoides Flugge. (Group number 8-.) Rods thick, x n, usually in long threads, sporiferous. Spores elliptical, X mm. Gelatine colonies white with mycelium-like outgrowths; gela- tine liquefied. Pelhcle formed in broth. Gram positive. Tliis common soil organism has been held responsible for a disease of beets.'i*^ B. nicotianEe Uyeda is ascribed as the cause of a tobacco wilt in Japan "'â ^^^ which closely resembles that caused by B. sola- nacearum in America. The bacillus is x m with rounded ends, actively motile by peritri- chiate flagella. Spores are produced. A complete physiological studj^ is to be found in the articles above cited. Bacillus oleae (Arc.) Trev. (Group num- ber â.) C. 0. Smith describes the organism as a motile rod with rounded ends, x /jl. On agar slant growth thin, gray-white, spreading; colonies circular, whitish. On gelatine no liquefac- tion. Milk not coagulated. Distribution of flagella not stated. In oleander tubercles on leaves and twigs, and in olive tubercles C. O. Smith "^ found bacteria which he regards as this species. Upon puncture inocu- lation in both olive and oleander, tubercles were produced. Con- trols were not diseased. The organism was reisolated from the. Fig. 30.âCultures of B. nielonia on silicate jelly slants, 12 davs' growth, (30° C.) After Gid- 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 n
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
