. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ices, spring-ing by their bases from a black spot; compacted mycelium,spores abundant, cylindrical, black, i—3 septate, slightlypointed at their extremities ; 10—30 nik. long, by 8—10mk. wide. Macro-conidia : Macrosporium lycopcysici.~Y\ozz\,well developed, black, septate, somewhat flexuous, pro- ^Si^ Fig. 123.—PHOMA DESTRUCTIVA. PERITltEClUM ANDSPORES HIGHLY MAGNIFIED. presence of Peronospora infestans. The fungus wasnot producing its conidiiphores very abundantly, butstill there it was without doub
. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ices, spring-ing by their bases from a black spot; compacted mycelium,spores abundant, cylindrical, black, i—3 septate, slightlypointed at their extremities ; 10—30 nik. long, by 8—10mk. wide. Macro-conidia : Macrosporium lycopcysici.~Y\ozz\,well developed, black, septate, somewhat flexuous, pro- ^Si^ Fig. 123.—PHOMA DESTRUCTIVA. PERITltEClUM ANDSPORES HIGHLY MAGNIFIED. presence of Peronospora infestans. The fungus wasnot producing its conidiiphores very abundantly, butstill there it was without doubt. The central portion ofthe spots where the Peronospora first made its appear-ance were now nearly free from it, it being more orless confined to the circumferential portions of thespots. The appearance of these spots was quite unlikethe spots produced by the same fungus upon thePotato leaf. On the Tomato leaf the spots lack theblack rotting look which is so characteristic of thePotato disease. The Tomato leaf is larger andharder, so that instead of putrefying it rather dries up ;. ducing abundantly sooty-black irregular pyriform osub-quadrate muriform spores, which vary in size from20—70 mk. long, by 10—20 mk. wide,* Stvlospokes : Phoma destrucUva.—Perithecia carbo-naceous, minute, globose, spherical clustered spores,hyaline, oval, cylindrical, binucleate, 5—6 mk. long, —I mk. wide. Another disease which sometimes but much morerarely attacks Tomatos while still growing is due toa Dactylium very closely allied to if not identicalwith D. roseum, B., from which it differs in producingits spores in threes, and in growing parasitically upona living plant. This disease seems more especially toaffect that variety of Tomato known to gardeners as
Size: 1466px × 1705px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookdecade1870, booksubjectgardening, booksubjecthorticulture
