บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The effect of previous crop residues and tillage on Fusarium gead blight of wheat.

DILL-MACKY, R. and JONES, R.K.

Plant Disease 84: 71-76.

2000

บทคัดย่อ

The effect of previous crop residues and tillage on Fusarium gead blight of wheat.

Effects of previous crop residues and tillage practices on Fusarium head blight of wheat was monitored in plots of the Fusarium head blight of wheat was monitored  in plots of the Fusarium head blight susceptible spring wheat cultivar Norm following crops of corn, wheat and soybeans in 1995, 1996 and 1997. Moldboard plow, chisel plow and no-till treatments were imposed perpendicular to crop strips to establish a range of residue levels in ech of the previous crop residues. Fusarium head blight incidence and severity were greatest when wheat followed corn and least when wheat followed soybeans. Incidence and severity were lower in moldboard plowed plots than in either chisel plowed or no-till plots. The DON content of harvested grain was significantly correlated with Fusarium head blight incidence and severity. The DON level in wheat following soybeans, averaged across tillage treatments, was 25 % lower than in wheat following wheat and 50 % of the level in wheat following corn. These findings suggest that changes in regional tillage practices, principally the move toward conservation tillage and reduced-till systems, contributed to the recent Fusarium gead blight epidemics in the Upper Midwest.