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A Chloride Deficient Leaf Spot of Durum Wheat

Dep. Land Resources and Environmental Sci., Montana State Univ., Bozeman, MT 59717-3120

View larger version (68K): [in a new window]   Fig. 1. Comparison of leaf spot symptoms in WB881 durum wheat 1 wk postflowering for plants grown under hydroponics (Growth room Experiment I). A = control, no halide added; B = 30 mmol Cl pot-1; and C =1.5 mmol Br pot-1.

View larger version (28K): [in a new window]   Fig. 2. Leaf spot severity for WB881 durum wheat vs. d after transplanting as affected by halide level (0, 1.5, 3.0, 6.0, and 30.0 mmol pot-1) [53, 61, 68, and 89 d posttransplant = boot, flower, watery-ripe, and soft-dough stages, respectively (Growth room Experiment I)].

View larger version (16K): [in a new window]   Fig. 3. Leaf spot severity (flag, flag-1) at watery-ripe stage versus shoot plant Cl concentrations for WB881 durum wheat grown under hydroponics (Growth room Experiment I). Observations from 30 mmol pot-1 Br treatment deleted from this analysis.