study, RCCD was used to analyze the interactions among W and N, P, and K fertilizer rate on growth parameters of gesnariad. The objectives of this study were 1) to quantify interactions among W, N, P, and K on plant height, crown diameter, number of
Asparagus is an herbaceous perennial in which the above-ground fern senesces, turning yellow in the fall, leaving the crown to overwinter. In southern Ontario, the primary production region within Canada, winter temperatures below –20 °C, early
control anthracnose on plants before transplanting to production fields. There are many potential sources of inoculum. Eastburn and Gubler (1990) showed the presence of inoculum in soil particles that were adhering to the roots and crowns of strawberry
sieve. Plants were then divided into roots, crowns, leaves (including petioles), and fruiting structures (flowers and fruit). The number of crowns was counted, and dry weight of leaves, roots, crowns, and fruiting structures was measured. Feeder root
Crowns of ostrich fern (Matteuccia struthiopteris L. Todaro) were field-planted in June 1993 on a Hadley silt loam in South Deerfield, Mass. Shade cloth was used to alter light intensity to determine if light intensity effects growth and development of fronds and crowns. Light levels were 22% (low), 45% (intermediate), 72% (high), and 100% (full) of ambient conditions. Survival of crowns decreased with increasing light intensity with only 22% survival under full light. Low, intermediate, and high light levels resulted in 89%, 75%, and 56%, respectively, of crowns producing shoots. Light intensity did not effect the number or length of fronds produced. Frond length reached a maximum after 2 months growth. Development of secondary crowns was enhanced at intermediate and high light intensities. Final crown weight was significantly correlated with initial crown weight regardless of light intensity. Crowns will be vernalized and forced hydroponically to determine effects of light intensity and crown size on growth of croziers.
the destructive oomycete Phytophthora cactorum (Lebert & Cohn) J. Schröt., which causes crown rot. P. cactorum causes disease in more than 200 plant species, including 150 genera representing 60 plant families, several of them within the rose
Abstract
Flowering of rhubarb (Rheum spp.) was affected by plant age and vernalization temperature and by vernalization time in young crowns. Year-old crowns flowered after storage at 0°C or 5°C for 3 months or more. All 19 week-old crowns flowered after storage at 0°C for 3 months or more and some flowered after storage at 5°C. The 16 week-old crowns flowered only after 4½ and 6 months storage at 0°C. None of the 13 week-old crowns flowered. There was no flowering of crowns stored at 10°C regardless of age or length of storage. Growing temperature and photoperiod following vernalization did not influence flowering.
Pineapple is normally propagated using crowns, slips ( Fig. 1A ), or, less commonly, shoots borne at any position on the plant stem (suckers). When pineapples are grown for processing (e.g., canning, fresh cut), there are sufficient crowns
temperature of postharvest tomato fruit in a convection chamber, and 4) increased the freeze tolerance of bermudagrass crowns and stolons. Materials and methods Detached tomato leaves. ‘Supersonic’ tomato seeds purchased from Harris Seeds (Rochester, NY) were
has received minimal attention in ornamental species, repeated isolations of this fungus from dogwood roots and the crown region in field plantings suggest a need to evaluate its impact on flowering dogwood seedlings. Common cultural practices used in