A daminozide plus chlormequat chloride tank mix spray was applied to six Coleus cultivars or breeding lines at different times during propagation. For UF 03-8-10 and `Coco Loco', plants sprayed on day 7 or day 10 were shorter than control plants at transplant, but plants sprayed on day 13 were not. Other cultivars did not respond to single applications. Five of the six cultivars responded to application on days 7 and 13. Plants of UF 03-8-3 and `Coco Loco' were significantly shorter than control plants at transplant. Plants of UF 03-8-10, UF 03-6-1, and UF 03-17-8 were shorter than control plants at 3 weeks after transplant. `Hurricane Louise' did not respond to the tank mix. A second study found a cultivar specific response to three chemical treatments applied as a spray on day 10 of propagation. At transplant, UF 03-8-10, UF 03-8-3, UF 03-6-1, and `Coco Loco' plants sprayed with the tank mix at 2500 plus 1500 mg·L-1, respectively, were significantly shorter than the control plants. A uniconazole spray at 2 mg·L-1 reduced elongation in UF 03-8-10, UF 03-8-3, and UF 03-6-1, compared to control plants. Ethephon at 250 mg·L-1 reduced elongation in UF 03-8-10, UF 03-8-3, and `Coco Loco' plants. None of the chemical sprays reduced elongation in `Hurricane Louise' at the concentrations applied. Ethephon increased axillary branching in all cultivars, and induced lower leaf abscission in UF 03-17-8 and `Hurricane Louise'; leaf malformation in UF 03-6-1 and `Coco Loco'; and color alteration in UF 03-6-1, UF 03-8-3, and `Coco Loco'.
Jennifer K. Boldt and James E. Barrett
S.M. Scheiber, R.C. Beeson Jr, J. Chen, Q. Wang and B. Pearson
to determine effects of irrigation quantity and irrigation frequency on shoot and root growth, actual evapotranspiration, and nitrate leaching from simulated landscape beds of Solenostemon scutellarioides (L.) Codd ‘Yalaha’ (coleus). Plants were
Amy L. Shober, Christine Wiese, Geoffrey C. Denny, Craig D. Stanley, Brent K. Harbaugh and Jianjun Chen
with 20% vermiculite and 20% perlite. Plant materials and experimental design. Three annual bedding plant species, Solenostemon scutellarioides L. Codd ‘Wizard Velvet’, Tagetes patula L. ‘Safari Queen’, and Begonia × hybrida ‘Dragon
S.M. Scheiber and Richard C. Beeson, Jr
Previous research indicated that bedding plants can be maintained in landscape soils allowed to dry to substantially less than field capacity before irrigation; however, canopy size and aesthetic quality were compromised. Continuing this research, ‘Yalaha’ coleus (Solenostemon scutellarioides) were grown in drainage lysimeters in an open-sided clear polyethylene-covered shelter and a companion uncovered field plot to assess growth characteristics and landscape quality when irrigated at various managed allowable deficits. Using tensiometers, plants were irrigated back to field capacity when plant-available water within a soil was depleted to 70% or 50%. Deficits were evaluated against a control treatment of 0.5 inch daily irrigation. Total irrigation volume applied was significantly greater for the control treatments than deficit irrigation treatments. The net result was 78% and 90% average reductions in total volume applied to lysimeter and field-grown coleus respectively. On average, height was 20% and 15% greater for well-watered controls grown in lysimeters and field plots respectively than plants grown in deficit irrigations. Canopy size of nondeficit controls was 26% and 72% greater on average than deficit treatments in lysimeter and field plots respectively. However, shoot and root dry weights, total biomass, shoot-to-root ratios, and landscape quality were similar among treatments for both locations.
Brigitte D. Crawford, John M. Dole and Ben A. Bergmann
Influence of season of the year, cutting week within a propagation cycle (number of weeks from which a stock plant has been harvested), stock plant age, and rooting compound on postpropagation cutting quality, and adventitious rooting was examined for ‘Stained Glass’ coleus (Solenostemon scutellarioides). Cuttings were of higher quality and produced more robust root systems when a propagation cycle started in summer vs. fall or spring even when cuttings were harvested from stock plants of the same age. Cutting week within a propagation cycle significantly influenced postpropagation cutting quality and rooting when cuttings were harvested over many weeks from the same stock plants and when cuttings were harvested for three propagation events using stock plants of different ages. When cuttings were harvested on the same days from stock plants of three distinct ages, cuttings harvested in the first week were larger with greater root weights but had more yellowed leaves and lower quality ratings compared with the two subsequent cutting weeks, but stock plant age had no effect on any observed parameter. Treatment with rooting compound did not overcome the significant influences of season and cutting week within a propagation cycle whether rooting was carried out in a greenhouse or growth chamber. Shoot and root fresh and dry weights were positively correlated with both daylength and midday instantaneous light of the stock plant environment.
Kristin L. Getter and Bridget K. Behe
preferred followed by Browallia speciosa and then Impatiens hawkeri . Solenostemon scutellarioides was preferred least. For the second conjoint question set (partial shade-tolerant species), three impatiens alternative species also scored a positive
Yanjun Guo, Terri Starman and Charles Hall
plants to maintain higher visual quality during postproduction. Materials and Methods Plant material and growing conditions. Rooted cuttings of coleus ( Solenostemon scutellarioides ) ‘French Quarter’, petunia ( Petunia × hybrida ) ‘Colorworks Pink
Nathan J. Herrick and Raymond A. Cloyd
predation by adult rove beetles and survival of fungus gnat larvae when feeding on coleus, Solenostemon scutellarioides L. Codd, roots under greenhouse and laboratory conditions. The goal of our study was to obtain information associated with production
Brian K. Hogendorp and Raymond A. Cloyd
(Expts. 2 through 4). Expt. 1: Effects of potassium bicarbonate (MilStop ® ) on the citrus mealybug. Sixty plants of green coleus, Solenostemon scutellarioides (L.) Codd., were started from cuttings taken from stock plants and transplanted into 15.2-cm
Andrew Koeser, Gary Kling, Candice Miller and Daniel Warnock
Despite consumer interest in biocontainers, their use in commercial greenhouse production remains limited. Previous research indicates that a perceived incompatibility of biocontainers with current production systems may be a barrier to their widespread adoption. This article investigates two potential areas of concern for growers looking to adopt biocontainers as part of their production process: 1) the ability of biocontainers to withstand the rigors of a semimechanized commercial production process, and 2) biocontainer performance under three different irrigation methods (i.e., hand, ebb-and-flood, and drip irrigation). In the two studies presented here, ‘Florida Sun Jade’ coleus (Solenostemon scutellarioides) was evaluated to match measures of container resiliency with plant performance. Results indicate that plants grown in biocontainers were of equal size and quality as those grown in conventional plastic containers within each of the irrigation types tested. However, some biocontainers were more prone to damage during crop production, handling, and shipping.