Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] MACROSPORIUM 503 or with the apex somewhat narrowed, variously muriformly septate, 80-120 X 15-22 /x. Chlamydospores formed in the decaying substance of diseased portions of the host, very irregular in form and size, dark brown, either interstitial or terminal, sometimes in chains. Pycnidia often crowded, appearing along with or after the conidia; globose, black, with a small mouth, containing numerous minute, hyaline, elliptical conidia, about 3 x 2 /x. Although I have not caus
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] MACROSPORIUM 503 or with the apex somewhat narrowed, variously muriformly septate, 80-120 X 15-22 /x. Chlamydospores formed in the decaying substance of diseased portions of the host, very irregular in form and size, dark brown, either interstitial or terminal, sometimes in chains. Pycnidia often crowded, appearing along with or after the conidia; globose, black, with a small mouth, containing numerous minute, hyaline, elliptical conidia, about 3 x 2 /x. Although I have not caused conidia more than three Fig. 151.—Afdirusporiinn solani. i, tomato diseased ; 2, conidia in various stages of development, highly mag. months old to germinate, other observers have been more successful, and it is quite probable that old diseased stems or fruit lying about would continue to produce conidia the following season. At all events, chlamydospores are present in decaying parts, more especially in tomato fruit, consequently the most important point is to collect and destroy all diseased plants and fruit. Tomatoes should not follow a diseased crop of potatoes, or the reverse. If the disease appears, Bordeaux mixture would check its progress, so far as further infection from conidia is concerned. Massee, y(?//r«. Bd. Agric, 13, p. 232 (1906). Carnation macrosporium {Macrosporiimi nolnle, Vize.) sometiines does a considerable amount of injury to cultivated carnations, forming numerous small blackish spots on both surfaces of the leaves and stem. The spots are irregularly scattered over the entire surface of the leaves when badly attacked, and the mycelium is rampant in the tissues, causing the leaves to turn yellow and die. Numerous small black
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