. Fig. 79.—Sclerotinia ur7iula. i, chain of conidiain young stage ; 2, chain of conidia at maturity ; the narrow necks or disjunctors deliquesce, and set the conidia at liberty; 3, ascophores springing from mummified fruits ; 4, ascus with spores ; 5, paraphyses. All figs except 3 mag. This is a very difficult disease to combat; if diseased patches are observed while yet quite small in area, the clover should be cut, and after remaining for some time to dry, some dry litter should be spread over the diseased patch, and set on fire. By this means all the sclerotia are destroyed. Clover should n
. Fig. 79.—Sclerotinia ur7iula. i, chain of conidiain young stage ; 2, chain of conidia at maturity ; the narrow necks or disjunctors deliquesce, and set the conidia at liberty; 3, ascophores springing from mummified fruits ; 4, ascus with spores ; 5, paraphyses. All figs except 3 mag. This is a very difficult disease to combat; if diseased patches are observed while yet quite small in area, the clover should be cut, and after remaining for some time to dry, some dry litter should be spread over the diseased patch, and set on fire. By this means all the sclerotia are destroyed. Clover should not be sown on infected land for some years after an epidemic. A dressing of kainit is good for infected land. Cowberry sclerotinia, Sclerotinia ur?iula, Rehm. { = S. vac- cina, Woron.), produces its conidial form of fruit, under the form of a snow-white, thin mildew on the living stems and leaves of the cowberry (Vacciniuin vitis-idaea). This mildew belongs to the form-genus Oidium, and was at one
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
