Symptoms
Older leaves show interveinal chlorosis, sometimes followed by a faint necrosis. Marginal scorch spreads allover the leaf blade. Total growth is only moderately stunted. Very poor flowering and fruiting.
Causes
Copper deficiency (right)
Levels of 2-50 ppm Cu in leaf tissue are recommened. Cu mobility and uptake may be restricted by high soil pH and excessive P, Zn, and Al. Furthermore, Cu adsorption to Fe, Al and Mn oxides can be significant.
Symptoms
Older leaves show interveinal chlorosis, sometimes followed by a faint necrosis. Marginal scorch spreads allover the leaf blade. Total growth is only moderately stunted. Very poor flowering and fruiting.
Causes
Copper deficiency
Levels of 2-50 ppm Cu in leaf tissue are recommened. Cu mobility and uptake may be restricted by high soil pH and excessive P, Zn, and Al. Furthermore, Cu adsorption to Fe, Al and Mn oxides can be significant.
Symptoms
Older leaves show interveinal chlorosis, sometimes followed by a faint necrosis. Marginal scorch spreads allover the leaf blade. Total growth is only moderately stunted. Very poor flowering and fruiting.
Causes
Copper deficiency
Levels of 2-50 ppm Cu in leaf tissue are recommened. Cu mobility and uptake may be restricted by high soil pH and excessive P, Zn, and Al. Furthermore, Cu adsorption to Fe, Al and Mn oxides can be significant.
Symptoms
Older leaves show interveinal chlorosis, sometimes followed by a faint necrosis. Marginal scorch spreads allover the leaf blade. Young leaves show a dark, bronze-colored tint. Total growth is only moderately stunted. Very poor flowering and fruiting.
Causes
Copper deficiency
Levels of 2-50 ppm Cu in leaf tissue are recommened. Cu mobility and uptake may be restricted by high soil pH and excessive P, Zn, and Al. Furthermore, Cu adsorption to Fe, Al and Mn oxides can be significant.
Symptoms
Older leaves show interveinal chlorosis, sometimes followed by a faint necrosis. Marginal scorch spreads allover the leaf blade. Young leaves show a dark, bronze-colored tint. Total growth is only moderately stunted. Very poor flowering and fruiting.
Causes
Copper deficiency
Levels of 2-50 ppm Cu in leaf tissue are recommened. Cu mobility and uptake may be restricted by high soil pH and excessive P, Zn, and Al. Furthermore, Cu adsorption to Fe, Al and Mn oxides can be significant.
Raspberry: 0.5 l/ha applied early in the season before the start of flowering. Water rate: 200 l/ha.
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