Search Results

You are looking at 1 - 7 of 7 items for

  • Author or Editor: T. M. Blessington x
Clear All Modify Search

Abstract

Ficus benjamina was stored in the dark for 0, 3, 6, 9, or 12 days and then held in a simulated interior environment (SIE) for 12 weeks under 6, 12, or 24 hours/day light duration of either incandescent (INC) or Cool White fluorescent (CWF) lamps at 20 μE m−2s−1 photosynthetically active radiation (PAR). Leaf drop was less and plant grade was higher with shorter dark storage periods. Plants lighted for 24 hours/day had less leaf drop and better plant grade than those lighted for shorter durations. Chlorophyll content was greater as light duration increased for plants held under CWF lamps. Plants lighted for 6 hr/day under INC lamps had the lowest chlorophyll content after 12 weeks in the SIE.

Open Access

Abstract

Ficus benjamina was held in light-and-temperature-controlled chambers for 12 weeks under 3 light sources of 20 μE m−2s−1 incandescent (INC) lamps, 20 μE m−2s−1 Cool White fluorescent (CWF) lamps, or 10 μE m−2s−1 INC + 10 μE m−2s−1 CWF light combination totaling 20 μE m−2s−1 photosynthetically active radiation (PAR). Plants also received 4 light durations (6, 12, 18, or 24 hr/day). Growth index was greater for plants held under INC. When plants were held under the light combination, leaf drop was reduced and plant grade was improved. Dry weight and plant grade increased and leaf drop decreased when plants were lighted for 24 hr/day. Chlorophyll content decreased under the light sources in the following order: CWF> light combination >INC.

Open Access

Abstract

Ficus benjamina were treated with ancymidol [α-cyclopropyl-α- (p- methoxyphenyl)-5-pyrimidine methanol] as a soil drench using 1.0 mg/15-cm pot plus 200 ppm spray. Plants were exposed to dark storage treatments (0, 4, 8, and 12 days) in shipping boxes before being held 4 months in a simulated interior environment (SIE) under 15 μE m−2s−1 photosynthetically active radiation (PAR) from incandescent (INC) lamps or Cool White fluorescent (CWF) lamps. Leaf drop was less for ancymidol-treated plants for all dark storage periods in comparison to untreated plants. In addition, leaf drop was less on plants held in SIE 4 months under INC lamps. Ancymidol-treated plants had better plant grade for all dark storge periods than untreated plants when held under both lamp sources and were superior under INC lamps.

Open Access

Abstract

Ficus benjamina was maintained 10 weeks in a simulated interior environment (SIE) with a controlled temperature of 21°C ± 1° under either 15 µEm-2sec-1 photosynthetically active radiation (PAR) from Cool White fluorescent (CWF) lamps or 15 µEm-2sec-1 (PAR) from incandescent (INC) lamps after receiving no light for various time periods (0, 4, 8 and 12 days). Plants held under CWF had a decrease in chlorophyll content and increase in leaf drop with increased days in dark. Quality as determined by leaf retention and plant grade indicated that those plants receiving 8 and 12 days dark storage and held under CWF lamps lost more leaves and were not salable after 10 weeks in SIE. Most plants held under INC lamps had no decrease in chlorophyll content, retained more leaves, and maintained good plant grade regardless of days in dark storage.

Open Access

Abstract

Ficus benjamina L. was dark-stored for 4, 8, or 12 days at 3°, 7°, 21°, 35° or 39°C, and then held indoors for 30 days. Plants received no damage when stored at 21° or 35° or when stored for 4 days at any temperature treatment. Leaf loss and foliar damage were more severe and dry weight, chlorophyll content, and plant grade were reduced as exposure time increased from 4 to 12 days. Plants exposed to 21° or 35° had less leaf loss and no foliar damage and greater dry weight, chlorophyll content, and plant grade than plants exposed to 3°, 7°, or 39°. Chlorophyll content was least in plants exposed to 39°.

Open Access

Abstract

F. benjamina L. were produced in a greenhouse shaded to provide a maximum natural light level of 400 or 800 μmol s-1m-2 photosynthetic photon flux density (PPFD) for 5 months. Plants were held indoors for 12 weeks under incandescent (INC) or cool-white fluorescent (CWF) lamps at 10 μmol s-1m-2 or 20 μmol s-1m-2 for 12 hr/day. Leaf drop was substantially reduced and plant quality was increased when plants were produced under 800 μmol s-1m-2 or when plants were held indoors under 20 μmol s-1m-2 of light. Leaf loss in response to production light levels, postproduction light levels, and light source was different when measured over time. Dry weight was increased when plants were produced under 800 μmol s-1m-2. Chlorophyll content was increased in plants grown under 400 μmol s-1m-2 or held under CWF lamps.

Open Access

Abstract

Epipremnum aureum (Linden & Andre) and Pilea depressa (Swartz) Blume were grown under different watering methods (a capillary mat and controlled volume of 250 ml/15 cm pot twice a week) and treated with the growth retardant alpha-cyclopropyl-alpha-(p-methoxyphenyl)-5-pyrimidinemethanol (ancymidol) as a soil drench at concentrations of 0, 0.25, 0.50 and 0.75 mg/15 cm pot and later held for 6 weeks in a simulated interior environment (SIE) with a controlled temperature of 18 ± 1°C and light intensity of 1080 lux. Ancymidol treatments retarded internode length and stem length of E. aureum regardless of watering methods. Fresh weight was not influenced by ancymidol but was affected by type of watering. Ancymidol retarded internode length and stem length of P. depressa and reduced fresh weight regardless of watering methods.

Open Access