Factors influencing notching and necrosis of Dracaena deremensis Warneckii foliage

Journal Article · Mon Jan 01 00:00:00 EST 1973 · Proc. Amer. Soc. Hortic. Scie. Trop. Reg.; (United States)

OSTI ID:5877094

Conover, C A; Poole, R T

Quality of Dracaena deremensis Warneckii Engler. cuttings imported from Puerto Rico deteriorated during propagation and growing in commercial nurseries in Apopka, Florida. Foliage became necrotic with reddish brown spots occurring along edges, particularly in the white areas. As plants increased in size, notches occurred in the leaves. Tissue analyses indicated that Ca and Cu content decreased, F increased and Mg, Fe, Zn and Mn increased then decreased with time from importation. To determine possible method of alleviating the notching and necrosis, three 3x2x2 factorial experiments were established in 3 shade levels. Varying rates of boron, Osmocote (18-6-12) and Perk, a micronutrient blend, were applied to rooted Warneckii. Osmocote and Perk levels had no effect on necrosis or notching. Increasing light increased necrosis and increasing B decreased no. of notched leaves of plants grown under 80% shade. 11 references, 4 tables.

• Research Organization: Univ. of Florida Agricultural Research Center, Apopka
• OSTI ID: 5877094
• Journal Information: Proc. Amer. Soc. Hortic. Scie. Trop. Reg.; (United States), Vol. 17
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
FLUORIDES
BIOLOGICAL EFFECTS
LEAVES
INJURIES
BORON
CALCIUM
COPPER
EXPERIMENTAL DATA
FOLIAR UPTAKE
IRON
MAGNESIUM
MANGANESE
NECROSIS
NITROGEN
PHOSPHORUS
POTASSIUM
ROOT ABSORPTION
VISIBLE RADIATION
ZINC
ABSORPTION
ALKALI METALS
ALKALINE EARTH METALS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
METALS
NONMETALS
NUMERICAL DATA
PATHOLOGICAL CHANGES
RADIATIONS
SEMIMETALS
TRANSITION ELEMENTS
UPTAKE
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)