Survey of the incidence of whiteheads in wheat crops grown in northern New South Wales, 1976-1981 [crown rot; Fusarium graminearum]
1990
Klein, T.A. | Ellison, F.W. (Sydney Univ., Narrabri (Australia). I.A. Watson Wheat Research Centre) | Burgess, L.W. (Sydney Univ. (Australia). Dept. of Plant Pathology and Agricultural Entomology)
Whiteheads were associated with plants affected by crown rot and were common in wheat crops in the survey areas, although the incidence was low (5 percent or less) in most crops. There was a high incidence of whiteheads (greater than 5 percent) in a small number of crops in each year. The mean incidence of whiteheads was highest in 1977 and was generally higher in the western, lower rainfall areas than in the other areas each year. The predominant crown rot pathogen Fusarium graminearum Group 1 was isolated from 97 percent of 1450 stem bases collected from plants with whitehead symptoms. A fallow of 18 months was not always associated with a reduction in the incidence of whiteheads.
显示更多 [+] 显示较少 [-]