Annual report of the North Carolina Agricultural Experiment Station . 2G-123 x 10-20fi catenulate, clavate,tapering to pedicul, base obtuse, dark brown, transverse septa 5-9, longitudinalsepta 0-5. Spot ashen white definite, subcircular. On artificial media poor in carbohydrates color of mycelium and sporeslighter, smaller and with fewer septa. Habitat: Living leaves and stems of Dianthus Carophyllus, Raleigh, N. C. 3Stevens and Hall, Variation in Fungi Due to Environment, Bot. Gaz. 48, July, 1909. THIRTY-SECOND ANNUAL REPORT, HYPOCHNOSE OF POMACEOUS By F. L. Stevens and J. G. Hall. A
Annual report of the North Carolina Agricultural Experiment Station . 2G-123 x 10-20fi catenulate, clavate,tapering to pedicul, base obtuse, dark brown, transverse septa 5-9, longitudinalsepta 0-5. Spot ashen white definite, subcircular. On artificial media poor in carbohydrates color of mycelium and sporeslighter, smaller and with fewer septa. Habitat: Living leaves and stems of Dianthus Carophyllus, Raleigh, N. C. 3Stevens and Hall, Variation in Fungi Due to Environment, Bot. Gaz. 48, July, 1909. THIRTY-SECOND ANNUAL REPORT, HYPOCHNOSE OF POMACEOUS By F. L. Stevens and J. G. Hall. A disease which from its most prominent symptoms may popularly well becalled the leaf blight and which may technically be designated as Hypochnose,has been under observation and study by the authors several years, as affect-ing the apple, pear, and quince. During this time it has been frequently re-ferred to the Experiment Station for diagnosis and treatment, and it seemsto be one of the worst diseases occurring on neglected trees in the humidportions of the Fig. 41.—Sclerotia and rhizomorphicmycelium upon apple twigs; natural size. SYMPTOMS. Viewed from some distance, trees in early stages of Hypochnose appearmuch as do trees affected with the ordinary fire blight (Bacillose) caused byBacillus amylovorus (Burrill) De Toni, that is, the leaves on numerous Printed in Annales Mycologici, Vol. 7, No. 1, 1909. HYPOCHNOSE OF POMACEOUS FRUITS. 77 twigs throughout the trees are dead. Differing from BaciUose, however, theleaves instead of standing erect, usually droop, hanging down in dense,matted masses. The affection, too, is limited to the leaves, the twigs them-selves not dying as in the case of BaciUose. The resemblance is very strik-ing, and to the casual observer Hypoclinose would doubtless pass for the wide-spread, well-known fire blight. In later stages of the disease most of the affected leaves fall away and thesimilarity to BaciUose disappears, the tree now attracti
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