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- Author or Editor: H. F. Wilkins x
- HortScience x
Abstract
Necrotic areas along leaf margins and at leaf tips were observed on Freesia hybrida Bailey when an aqueous application of hydrofhiosilicic acid (H2SiF6) was added to the growing medium. Similar foliar symptoms occurred with the addition of superphosphate or treblesuperphosphate which contains 1.0–1.6% F as a contaminant. Tissue fluoride levels increased when H2SiF6, superphosphate or treblesuperphosphate was added to the soil.
Abstract
Seed germination of ‘Royal Mix’ freesia was most rapid and uniform at 15.5° or 18.5°C under clear polyethylene or at 13° or 21.5°C under black polyethylene. Soaking seeds in running water prior to germination or removal of the seed coat did not improve seed germination
Abstract
Vacuum infusion or soaking of freshly harvested Freesia hybrida Bailey ‘Moya’ corms in solutions of ethephon, gibberellic acid (GA3), abscisic acid (ABA), benzylamino purine (BA) or indoie-acetic acid (I A A), or in solutions with combinations of these growth regulators, did not decrease the time required for shoot emergence. Ethephon delayed shoot emergence and acted synergistically when combined with GA3, or with GA3 and BA, to further delay shoot emergence. Ethephon or ethephon + B A treatments increased the number of shoots produced per corm. Days to flower and flower quality were not influenced by any of the exogenous growth regulator treatments. Presently, there appears to be little horticultural advantage in applying these growth regulators to freesia corms to hasten shoot emergence prior to planting in order to circumvent the need for 10 to 13 week storage treatment at 28°C to remove dormancy and to ensure rapid shoot emergence.
Abstract
Lilium longiflorum Thunb. ‘Nellie White’ flower buds developed from visible bud to open flower more rapidly at constant 27°C than at constant 15°. This increased growth rate was most pronounced when buds were less than 6 cm. Once buds were greater than 10 cm, the differences in rate of flower bud growth at 15° compare to 27° was insignificant. Bud development was biphasic, with a relatively slow growth rate up to 6 cm and then an accelerated rate from 6 cm to open flower. The fitted regression line for buds less than 6 cm was: days to flower (DTF) = 37.969 - 8.945 Ln [bud length (L)] — 0.453 [(Temperature (T)]; for buds greater than 6 cm: DTF = 33.258 — 2.039 (L) - 0.736 (T) + 0.044 (L x T). The correlation coefficients for the 2 equations were respectively: r = 0.82 (R 2 = 0.67) and r = 0.93 (R 2 = 0.87).
Abstract
‘Ace’ lilies were placed in growth chambers at the visible flower bud stage under a 12-hour photoperiod with all possible day and night temperature combinations of 15.6°, 21.1°, 26.7°, and 32.2°C. At a constant day and night temperature of 15.6°, 21.1°, 26.7°, and 32.2° the time to flowering was 50, 28, 25, and 24 days, respectively. At a day temperature of 21.1°, night temperatures above 21.1° had little effect on flowering, but 15.6° greatly retarded flowering.
Abstract
Night irradiation of stock plants and cuttings during the rooting period with red (R) or incandescent (INC) light resulted in statistical differences in rooting of cuttings of chrysanthemum (Chrysanthemum morifolium Ramat. cvs. Bright Golden Anne and Mrs. Roy) but differences were not large enough to be of commercial concern. Rooting was best when stock plants were irradiated with R light and cuttings were subsquently rooted under INC light and poorest when cuttings from INC irradiated stock plants were rooted under R light.
Abstract
The impetus to compile a guide to terminology for the Easter lily was provided by a series of joint meetings between lily researchers and various industry representatives. During the course of these meetings, it became obvious that some terms did not relate the same phenomenon to all individuals. As a result, it was decided that an effort should be made to compile a list of terms directly related to Easter lily production and research. The glossary which follows is a result of those efforts. Hopefully, the guide will aid students, researchers, and industry representatives.