• Podranea Height Control with XE-1019

      Bailey, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Foliar sprays of XE -1019 at 3, 4 9, 12, 15, l8 and 36 mg a.i. liter⁻¹ were found to be effective in controlling the height of Podroea ricasoliana However, at higher concentrations (greater than 12 ppm), undesirable leaflet curling and reductions in leaflet size were observed All treatments lost effectiveness in controlling internode elongation during week 4 and 5.
    • Propogation and Nursery Production Studies With New Arid Land Species

      Miller, W. B.; Bailey, D. A.; Palzkill, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Several species of low -water requiring species have been successfully propagated through vegetative and sexual means. Auxin treatments and bottom healing were beneficial in many cases. Development of improved propagation schemes, and subsequent growing practices, will increase grower success and profitability, eventually increasing availability of new low water use plants to the Arizona consumer. The long-term result of this work will be the availability of new, low-water use plant species which may be utilized by the homeowner and landscape contractor. The addition of new and exciting plant materials to the consumer market, it is hoped will accelerate the use of arid species in the Arizona landscape, resulting in water savings throughout the state, particularly in urban areas.
    • Propogation of Baja Fairy Duster (Calliandra Californica) by Stem Tip Cuttings

      Bailey, D. A.; Miller, W. B.; Palzkill, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Stem tip cuttings of Calliandra californica were treated, prior to rooting with 0, 4,000, 4000, 12,000 or 16,000 ppm IBA in a talc formulation. Rooting was enhanced by application of 12,000 and 16,000 ppm IBA. Root system fresh weight increased with increasing concentration of IBA. No treatment effected percent survival of cuttings.
    • Rooting of Stem Cuttings of Mortonia scabrella

      Palzkill, D. A.; DePaul, L.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Mortonia scabrella can be successfully propagated by stem -tip cuttings during May to September. Better rooting seems to occur during the less stressful months of May and September than in mid-summer. A wide range of rooting response occurs between different clones; the best will root in the range of 70-80%, which should be acceptable in a commercial propagation situation. In one cycle of selection in which the best 3 out of 16 clones were selected for a repeat study, average rooting success increased from 6% to 33 %. Apparently genetic differences for rooting potential occur. Further selection from larger populations, and/or breeding for this trait should result in cutting propagation becoming relatively easy for this species.
    • Ryegrass Overseed Trials for 1986-1987

      Kopec, D. M.; Mancino, C. F.; Terrey, A.; Gomperts, S.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Ryegrass cultivars, experimental accessions, blends and composite mixtures were tested for overall adaptation to overseeded turfgrass management practices under desert conditions. Entries were significantly different from each other for color and overall turfgrass quality. Gennplasm for overseeding differs for tolerance to close mowing under desert conditions. In most cases, the better adapted entries had superior scores in two years of testing.
    • Ryegrass Turf Trials for 1987-1988

      Kopec, D. M.; Mancino, C. F.; Petty, M. J.; Salo, L.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
    • Seed Germination Response of Penstemon spp. To Gibberellic Acid

      Palzkill, D. A.; DePaul, L.; Sivilli, C.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Treatment of seed with gibberellic acid (GA) resulted in significant increases in germination percent for Penstemon ambiguous, P. barbatus, P. eatoni, P. palmeri, P. parryi. P. pseudospectabilis, P. secundiflorus, and P. strictus in one or both of two experiments which were conducted. Germination of several other species increased with GA treatment, but differences were not significant.
    • Spray Carrier Volume and Irrigation Method Effects on XE-1019 Efficacy on Poinsettias

      Bailey, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Plants of Euphorbia pulchenima Wind. 'Gutbier V-14 Glory Annette Hegg Dark Red', and 'Annette Hegg Brilliant Diamond' were treated with 37 iw a.i. of XE-1019 applied in 102, 204, or 408 ml-m⁻² foliar sprays. Half of the plants received overhead irrigation and the remaining received soil-surface irrigations. No spray carrier volume effect or irrigation effect was observed for final plant height, bract canopy diameter, or for days from start of short days to bloom. The results obtained do not support the hypothesis that spray carrier volume or irrigation method affect the efficacy of XE-1019 on poinsettias.
    • Spray Carrier Volume Effects on XE-1019 and Chrysanthemums

      Bailey, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Plant of Chysanthemum morífolium Rymat. 'Ovaio' received 0, 102, 204, 304 or 408 ml-m⁻² of 0, 40, 20, 13.3, and 10 mg-liter⁻¹ XE-1019, respectively. No treatment affected time from start of short days to bloom or inflorescence display diameter. All XE-1019 treatments resulted in shorter plants than controls did. No carrier volume effect on plant height was observed. The inflorescence height range per pot decreased with increasing carrier volume. The greater inflorescence height uniformity achieved with the high carrier volume is beneficial and warrants further investigation.
    • Underutilized Native Woody Legumes for Landscape Use

      Johnson, M. B.; Palzkill, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
    • Use of Growth Retardants for Floral Initiation of Hydrangeas

      Bailey, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Floral initiation was successfully stimulated for plants of Hydrangea macrophylla 'Rose Supreme' under non-inductive environmental conditions by spraying plants with XE-1019 or paclobutrazol. Effective treatments were 10 weekly of 5 biweekly sprays of 100 mg-liter ⁻¹ paclobutrazol; 5 biweekly sprays of 11 or 30 mg-liter⁻¹ XE-1019, and 4 triweekly (once every 3 weeks) sprays of 15 or 30 mg-liter⁻¹ XE-1019.
    • Variation in Flowering and Germination in Hilaria belangeri

      Ralowicz, A. E.; Mancino, C. F.; Kopec, D. M.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)