. I funghi che causano malattia vegetale . Le malattie delle piante; funghi. I FUNGHI WHICFI causare malattia vegetale 45 rigorosa!}' intracellulare. Avvolte le vaccinazioni in muskmelon ha generalmente dato completo decadimento in da tre a sette giorni. Gli inoculi di simili- zione di cedro e cetrioli ha comportato il decadimento, sebbene l'inoculazione in squash non ha. Nessun decadimento del muschio- melone seguita applicazioni dei batteri per superfici integre. B. mycoides Flugge. (Numero del gruppo -22.1 8-.) Le aste di spessore, 0,95 x 1.6-2.4 n, solitamente in lunghi fili, sporiferous. Spore ellittiche, 1.3-1,50 X 0.7-0,9 mm. La gelatina di colonie di colore bianco con il micelio

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. 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 -22.1 8-.) Rods thick, 0.95 x 1.6-2.4 n, usually in long threads, sporiferous. Spores elliptical, 1.3-1.48 X 0.7-0.9 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 1-1.2 x 0.5-0.7 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 -22.333-0â.) C. 0. Smith describes the organism as a motile rod with rounded ends, 1.5-2.5 x 0.5-0.6 /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- dings.. 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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• bookcentury1900
• bookdecade1910
• booksubjectfungi
• bookyear1913