Article Figures & Data
Figures
- Figure 1.
Chlorotic Delaware Valley White Azalea following 7 weeks treatment with 5 ppm copper.
- Figure 2.
Comparison of the effects of copper treatment on spreading cotoneaster. The plant on the left received 0.032 ppm copper and the plant on the right 5.0 ppm copper.
- Figure 3.
Effect of copper concentration on azalea roots. Lateral branching is reduced by chronic copper levels.
- Figure 4.
Chronic copper toxicity injury on boxwood roots. Necrotic lesions and undeveloped laterals are characteristic.
- Figure 5.
Wilting is a symptom of acute copper injury. Silver halrs ware also prominent on young azalea leaves.
- Figure 6.
Basal chlorosis of cotoneaster caused by treatment for 10 days with 100 ppm copper.
- Figure 7.
Basal necrosis of cotoneaster caused by treatment for 10 days with 100 ppm copper
- Figure 8.
Comparison of chronic and acute levels of copper on boxwood roots.
Tables
- Table 1.
Copper, Fe, and Mn concentrations in roots, stems, and leaves of Delaware Valley Azalea, common boxwood, and spreading cotoneaster grown under varying copper regimes.Z
Species Nutrient Solution Cu Concentration (ppm) Tissue Analyzed Root Stem Leaf Cu concn ppm Fe concn ppm Mn oncn PPm Cu concn Ppm Fe concn ppm Mn concn ppm Cu concn ppm Fe concn ppm Mn concn Ppm Azalea 0.032 64 10168 171 14 127 27 7 103 18 0.5 187 2594 54 17 97 18 8 142 17 1.0Y 257 11021 173 40 88 18 11 178 16 2.5Y 599 5754 125 45 42 12 20 150 20 5.0Y 477 4565 125 80 57 25 21 132 21 50.0Y 4819 8380 147 X X X 35 224 27 100.0Y 6046 4716 115 266 o 132 85 56 321 34 r = .96w r = .18 r = .07 r = .98 r = .53 r = .97 r = .96 r = .95 r = .97 Boxwood 0.032 37 386 86 16 66 23 13 172 46 0.5 115 274 105 23 73 19 14 185 37 1.0 325 294 84 34 58 12 16 150 31 2.5 569 286 95 37 43 .15 17 163 35 5.0Y 673 251 97 61 64 8 23 139 19 50.0Y 3657 368 26 320 59 9 49 160 31 100.0Y 4368 466 18 296 69 12 65 174 40 r =,96w r= .81 r = .92 r = .9 r = .24 r = .38 r = .98 r = .21 r = .17 Cotoneaster 0.032 63 898 6 11 56 1 12 186 29 0.5 282 965 8 23 42 1 22 150 26 1.0Y 641 1081 8 37 41 2 26 127 16 2.5Y 1438 901 9 40 35 2 22 127 32 5.0Y 2710 859 7 88 75 2 26 209 59 50.0Y 7246 1141 9 130 64 11 47 132 102 100.0Y 7460 1232 12 211 45 13 95 224 67 r=,91w r = .84 r = .86 r = .95 r = .03 r ≈ .96, r = .98 r = .45 r=.66 ↵Z Data for azalea represent an average of 3 replications. Data for boxwood represent a composite of the 4 replications. Data for cotoneaster represent an average of the 4 replications at 2.5 ppm Cu treatment concentration and below, and a composite of the 4 replications at 5.0 ppm and above.
↵Y Plants in these treatment categories exhibited Cu toxicity symptoms.
↵X Samples destroyed in a lab accident.
x Coorelation of the nutrient solution Cu concn with the tissue-element concn.
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