Sodium injury to cuttings of chrysanthemum
AuthorsRobert D. Raabe
Joseph H. Hurlimann
Authors AffiliationsRobert D. Raabe is Associate Plant Pathologist, Department of Plant Pathology, Berkeley; J. Vlamis is Plant Physiologist, Department of Soils and Plant Nutrition, Berkeley; Joseph H. Hurlimann is Laboratory Technician II, Department of Plant Pathology, Berkeley; J. Quick is Associate in Agricultural Extension Service, Davis.
Hilgardia 20(11):12-14. DOI:10.3733/ca.v020n11p12. November 1966.
Following A change in the water supply used for irrigation and misting–from a shallow well (400 ft) to a deeper well (800 ft)–a large California chrysanthemum producer experienced extreme difficulty in rooting the cuttings. Early symptoms appeared as a loss of root hairs and small rootlets, and as a reddening of portions of the roots (photo 1). As severity increased, the tips beyond the reddened areas died and the number of roots increased. These failed to elongate so that in the most severely injured cuttings, only a tuft of short, reddish-brown roots was produced (photo 2). Except for the failure to elongate, there were no symptoms on the above-ground portions of most varieties.
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