The popular cultivar Snow Angel coral bells is a commercially important herbaceous perennial grown for its attractive white and green variegated foliage and bright pink flowers. To maintain the characteristic variegated foliage, ‘Snow Angel’ must be
Abstract
The avg wt increase of subirrigated dormant azalea tops after 75 days was 4.5g and of wax myrtle was 10.0g. The wax myrtle in a 30 cm deep perlite and peat medium produced the greatest fresh and dry wt which was twice as heavy as plants grown in a sand and bark medium. The peat, sand and soil and the peat and sand media produced the greatest new shoot number in azalea. The wax myrtle had greater shoot length in peat, sand and soil, and the per lite and peat media at 30cm depth, than in the peat and sand or the sand and coarse bark media. The azalea produced 5 shoots per plant which averaged 23cm in length, while wax myrtle produced 4 shoots with 41 cm in length. There was a decrease in soluble salt level and media pH but an increase in % media moisture with greater sampling depth from surface to bottom. Subirrigation may be beneficial for a wide variety of plants and cultural conditions since it provided a precise amount of water at all times.
In the United States, coral bell ( Heuchera hybrida L.) production increased by 167% ($14.4 million USD) from 1997 to 2014 ( USDA, 1998 , 2015 ). The increasing consumer demand for this herbaceous perennial is because of their colorful foliage and
) at rates as low as 300 ppm ( Latimer et al., 2011 ), while ‘Silver Lode’ coral bells responded minimally to an application of 600 ppm benzyladenine for both plant height and width ( Latimer and Freeborn, 2015 ). The wide range of possible plant
. 79.38°W), five commonly grown nursery crops were selected for study, based on their economic value and relative importance to Ontario nurseries: bigleaf hydrangea, ‘Green Velvet’ boxwood, ‘Magic Carpet’ spirea, ‘Palace Purple’ coral bells, and rose of
of holding solutions and recommends the use of only a hydrator. Armitage and Laushman (2003) indicated that vase life would be from 7 to 10 d with a preservative. Coral bells ‘florists choice’. The longest vase life was obtained when hydrator and
The influence of photosynthetic photon flux density (PPFD) and gibberellic acid (GA3) sprays on shoot elongation was determined for `Coral Bells' (Kurume or R. obstusum hybrid), `Fashion' (Glen Dale or R. indicum × Kurume hybrid), `Hexe' (R. obtusum × R. simsii hybrid), `Hinocrimson' (Kurume or R. obtusum hybrid), `Hinodegiri' (Kurume or R. obtusum hybrid), and `Red Wing' (Brooks hybrid) azalea. GA3 at 1 mm was more effective in stimulating shoot elongation of `Coral Bells', `Fashion', `Hinodegiri', and `Red Wing' than of `Hexe' or `Hinocrimson'. GA3 sprays were more effective in stimulating elongation when applied to plants growing at irradiance levels of 350 μmol·s-1·m-2 than to plants growing at either 200 or 100 μmol·s-1·-2. Gross photosynthesis of leaf segments was higher for a slow-growing cultivar (Hinocrimson) than for a faster-growing cultivar (Fashion). `Hinocrimson' produced stouter shoots (greater dry weight/cm) than did `Fashion'.
Abstract
Four cultivars of kurume azalea (Rhododendron sp.), ‘Hersey Red’, ‘Snow’, ‘Coral Bells’ and ‘Hino Crimson’ reported to have different susceptibilities to winter injury in the nursery were compared for their sensitivities to direct freezing injury (both to roots and leaves) and desiccation injury under controlled conditions. Sensitivity to root freezing injury was inversely correlated with winter injury. A positive association between leaf hardiness to freezing injury and resistance to winter injury was found only in ‘Hino Crimson’. Susceptibility to winter injury was most closely associated with desiccation, as indicated by the minimum water potentials under conditions of frozen soil and high evaporative demand.
Abstract
Off-Shoot-O (emulsified methyl esters of fatty acids) applied to azalea plants (Rhododendron indicum Sweet and R. obtusum Plauch cvs. Coral Bells, Red Wing, and Gloria) induced a chemical pinch to replace the hand pinching operation. There was no evidence which directly related air movement to a positive pinch, although there were trends which indicated differences from one season of the year to another. There were no differences in pinching action due to light intensity regimes.
Temperature was the major factor determining a positive chemical pinch. Plants pre-conditioned at low temp were more sensitive to the chemical pinching agent than were plants pre-conditioned at high temp.
Abstract
Alachlor [2-chloro-2’,6’-diethyl-N-(methoxymethyl)acetanilide], napropamide [2-(α-naphthoxy-N,N-diethylpropionamide], oryzalin [3,5-dinitro-N 4, N4 -dipropylsulfanilamide], oxa-diazon [2-terr-butyl-4-(2,4-dichloro-5-isopropoxyphenyl)-∆2-l,3,4-oxadiazolin-5-one], each at 2.2, 4.5, 9.0 and 17.9 kg/ha, oxyfluorfen [2-chloro-l-(3-ethoxy-4-nitrophenoxy)-4-(trifluoro-methyl) benzene] at 1.1, 2.2, 4.5 and 9.0 kg/ha and prodiamine [2,4-dinitro-N 3, N3 -dipropyl-6-(trifluoromethyl)-l,3-benzenediamine] at 4.5, 9.0 and 13.4 kg/ha were evaluated for weed control and phytotoxicity in container-grown azaleas, Rhododendron indicum (L.) Sweet. ‘Formosa’ and Rhododendron obtusion (Lindl.) Planch. ‘Coral Bells’. All herbicides at all but the lowest rates effectively controlled grasses and broadleaved weeds. All herbicides at 9.0 kg/ha or higher rates were phytotoxic to these azaleas and restricted growth, root development and marketability. ‘Coral Bells’ was more susceptible to herbicide treatments than ‘Formosa’. Both azaleas were highly susceptible to oxyfluorfen.