. Fig. 17. Fusarium wilt or root rot. At left, healthy; at right, infected. form chlamydospores. These are round hyalin bodies often filled with oil globules and are formed in the center of the hypha (Fig. 18), in this case the contents of the former collect into the chlamydospores. Usually also the chlamydospores are born at the tip end of the hyphae in chains of twos, threes and even fours (Figs. 19-22). Old cultures are practically one mass of chlamydospores. There are also two spore forms present and these appear as early as the third day in the pure culture. These are microconidia which a
. Fig. 17. Fusarium wilt or root rot. At left, healthy; at right, infected. form chlamydospores. These are round hyalin bodies often filled with oil globules and are formed in the center of the hypha (Fig. 18), in this case the contents of the former collect into the chlamydospores. Usually also the chlamydospores are born at the tip end of the hyphae in chains of twos, threes and even fours (Figs. 19-22). Old cultures are practically one mass of chlamydospores. There are also two spore forms present and these appear as early as the third day in the pure culture. These are microconidia which are fairly abundant and macroconidia, varying from two celled to four celled. The average form is the three celled. Both micro- and macro- conidia are hyalin and smooth (Figs. 23-31). In old cultures the macroconidia shrink so that -the septa become slightly pronounced (Figs. 25, 28-29). These old macroconidia soon lose their protoplasm or the latter breaks up
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsweetpeas, bookyear19
