. The fungi which cause plant disease . Plant diseases; Fungi. 578 THE FUNGI WHICH CAUSE PLANT DISEASE The form is an atypical one in that it produces two kinds of spores; one kind which is usually septate Heald ^ also Stewart and Hodg- kiss^"* have described it as the cause of bud rot of carnations, while the latter authors also mention it in connection with a disease known as "silver top" of June grass in Fig. 387.—s. poae. ^ which the panicles wither'as they ing conidiophores and macrooo- i ,i .i_ nidia. 13, Hypha bearing co- expand, thougli the authors express &a
. The fungi which cause plant disease . Plant diseases; Fungi. 578 THE FUNGI WHICH CAUSE PLANT DISEASE The form is an atypical one in that it produces two kinds of spores; one kind which is usually septate Heald ^ also Stewart and Hodg- kiss^"* have described it as the cause of bud rot of carnations, while the latter authors also mention it in connection with a disease known as "silver top" of June grass in Fig. 387.—s. poae. ^ which the panicles wither'as they ing conidiophores and macrooo- i ,i .i_ nidia. 13, Hypha bearing co- expand, thougli the authors express &HeSd. '^^ "^«"<»"idi^ doubt as to its actual causal relation to the disease. A mite appears to be the carrier of the spores. Cultural studies and cross-inoculation showed the fungus form on the two hosts to be identical. Botrytis (MicheU) Link (p. 576) Hyphse creeping; conidiophores simple or more or less markedly dendritic branched, erect, branches various, thin and apically pointed, thick and obtuse or cristate; conidia variously grouped at the apex of the branches, never in true heads, continuous, globose, elliptic or oblong, hyaline or light colored. In part =Sclerotinia. See p. 136. A genus of some two hundred or more species, several of them of great economic importance. This form-genus contains many parasites on various hosts. In some instances they are known to include ascigerous stages, (Sclerotinia), in their life cycle; in others no such relation is known, though it has often been assumed on quite untenable grounds. Specific limitations are but poorly imderstood and the relations between the various forms and between these forms and the as- cigerous stages are in a state of much confusion c. f. (p. 137). In some instances the same conidial stage is claimed by different in- vestigators as belonging to two distinct ascigerous species, a manifest impossibility, (e. g., S. fuckeliana and S. libertiana with B. cinerea.). Please note that these ima
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
