. Fig. 14(3.—Ront-system of a Silver Fir overgrown and killed by the mycelium of Rhizina undulata. (After Hartig.) Pig. 147.—Ascospores of Rhizina. a, As taken from the ascus; b, 24 hours after sowing; c, 48 hours after sowing; d, the spore of c enlarged. (After Hartig.) filled up. Masses of fungoid pseudoparenchyma are frequently formed between the dead and diseased tissues. Strands of the nature of Rhizodonia emerge from the diseased roots, many of them carrying thread-like processes, at the extremity of which an oil-drop is secreted and escapes on rupture of the apex. According to Hartig, v
. Fig. 14(3.—Ront-system of a Silver Fir overgrown and killed by the mycelium of Rhizina undulata. (After Hartig.) Pig. 147.—Ascospores of Rhizina. a, As taken from the ascus; b, 24 hours after sowing; c, 48 hours after sowing; d, the spore of c enlarged. (After Hartig.) filled up. Masses of fungoid pseudoparenchyma are frequently formed between the dead and diseased tissues. Strands of the nature of Rhizodonia emerge from the diseased roots, many of them carrying thread-like processes, at the extremity of which an oil-drop is secreted and escapes on rupture of the apex. According to Hartig, very tiny conidia are abjointed from the mycelium. De la Boulage^ and Prillieux have both come to the conclusion that "la maladie du rond " of Finns sylvestris and P. maritima is the same disease as the " ring-disease " caused by Rhizina. ^ BiiH. da la soc. Afjric. de France, 1880.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
