. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom . of Ruston the stem ofwheat. cluster - cupstage of thewheat Rust fun-gus growing ona barberry leaf. forms, delimited by differences in the marked capacityof the uredo- or teleutospores to inoculate on differenthosts. Several rusts are common on cultivated plan
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom . of Ruston the stem ofwheat. cluster - cupstage of thewheat Rust fun-gus growing ona barberry leaf. forms, delimited by differences in the marked capacityof the uredo- or teleutospores to inoculate on differenthosts. Several rusts are common on cultivated plants,causing disease; viz., beet rust ( ifromyces Betw), broadbean rust (ifromyces Faboe), white pine rust (Cron-artiiim ribicolum), asparagus rust (Puccinia Asparagi), chrysanthemum rust (Puccinia Hieracii), black, orwheat rust (Puccinia graminis), hollyhock rust (Puc-cinia malvacearum), etc. John W. Harshberger. The rusts are fungi constituting a very large andeconomically important class known as are all obligatory parasites, attacking a vast num-ber of native and cultivated plants. The mycelium of. 2223. Ruta graveolens. Flowers slightly enlarged. the rust fungi exists entirely within the tissues of thehost. The spores are formed in masses or sori just be-neath the epidermis. When ripe they break throughthe epidermis, forming brown patches and spots fromwhich they are scattered. Many of the rusts produceseveral spore-forms, which often occur in regular succes-sion either on the same host or on different hosts. Forexample, the wheat rust produces uredospores and teleu-tospores on the wheat and aecidiospores on the barberry. Rusts rarely kill the plants which they affect, andhence in many cases the damage done is not as appar-ent as in many other diseases. In all cases, however,the plants are weakened, and often much are among the most difficult fungoiis diseases tocombat. Spraying has been tried in many instances,but has proved, at most, only pa
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
