|
Abstract: In recent years Dutch mushroom growing has suffered severe losses from a virus disease of the cultivated mushroom, Agaricus bisporus (Lange) Sing. Hollings (1962) detected virus particles in association with a similar disease in England. Several authors (Gandy, 1962; Schisler, et al, 1967; Dieleman-van Zaayen, 1969) have reviewed the various types of symptoms. Frequent symptoms are bare zones where the mycelium grows only slightly, if at all, into the casing soil, and mushrooms of poor quality standing loose in the casing soil, often with a long stipe and an off-white cap that matures too early. Usually crop yield is seriously reduced. Since Dutch research into the disease started in 1966, usually three types of virus particles, often in combination, have been observed in cell-free preparations from diseased mushrooms : isometric particles with diameters of 25 and 34 nm, and elongated particles with rounded end, 19 x 50 nm (Dieleman-van Zaayen and Temmink, 1968; see also Fig. 1). We have isolated these particle types also from samples of diseased mushrooms from Belgium, Bulgaria, Germany, Italy, Switzerland, and the United States.
Full text download: ISMS subscribers
ISHS members & pay-per-view
Translate:
   |