Diseases of Cultivated Plants And Trees
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Pseudopeziza trifolii. I, clover leaf infected ; 2, fungus bursting through epidermis of leaf; 3, ascus with spores, also two paraphyses. Figs. 2 and 3 mag.
The ascophores originate in the tissues of the host, usually the leaves. Some are parasites, others saprophytes. Dis- tinguished by the ascophore developing in the tissue of the host, and bursting through to the surface at maturity.
Clover leaf spot, caused by Pseudopeziza trifolii (Fckl. ), is at times very injurious to the clover (Trifoli...um) and 278 DISEASES OF CULTIVATED PLANTS lucerne (Medicago sativa\ and as the disease spreads very quickly the entire crop usually suffers. The leaves are attacked, the injury first appearing as numerous minute spots which show both on the upper and under surface. At a later stage the ascophores burst through the skin of the leaf under the form of minute pustules or warts.
Ascophores produced in small groups on the upper surface of the leaf, dingy yellow, about 0*5 mm. Across; asci clavate, 8-spored ; spores hyaline, elliptic-oblong, 10-15x5-6 /x ; paraphyses rather stout This fungus has also been called Pseudopeziza medicaginis (Sacc.
What to read after Diseases of Cultivated Plants And Trees?
You can find similar books in the "Read Also" column, or choose other free books by George Massee to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Pseudopeziza trifolii. I, clover leaf infected ; 2, fungus bursting through epidermis of leaf; 3, ascus with spores, also two paraphyses. Figs. 2 and 3 mag.
The ascophores originate in the tissues of the host, usually the leaves. Some are parasites, others saprophytes. Dis- tinguished by the ascophore developing in the tissue of the host, and bursting through to the surface at maturity.
Clover leaf spot, caused by Pseudopeziza trifolii (Fckl. ), is at times very injurious to the clover (Trifoli...um) and 278 DISEASES OF CULTIVATED PLANTS lucerne (Medicago sativa\ and as the disease spreads very quickly the entire crop usually suffers. The leaves are attacked, the injury first appearing as numerous minute spots which show both on the upper and under surface. At a later stage the ascophores burst through the skin of the leaf under the form of minute pustules or warts.
Ascophores produced in small groups on the upper surface of the leaf, dingy yellow, about 0*5 mm. Across; asci clavate, 8-spored ; spores hyaline, elliptic-oblong, 10-15x5-6 /x ; paraphyses rather stout This fungus has also been called Pseudopeziza medicaginis (Sacc.
What to read after Diseases of Cultivated Plants And Trees?
You can find similar books in the "Read Also" column, or choose other free books by George Massee to read onlineMoreLess
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