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Janelle E. Glady, N. Suzanne Lang, and Erik S. Runkle

The management of herbaceous perennial species as stock plants for asexual propagation can be economically beneficial to commercial growers. Uniform vegetative growth and production of numerous shoots for cuttings are ideal qualities for stock

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R.C. Beeson Jr.

This research was partially supported by a grant from the Southwest Florida Water Management District. This work supported by the Florida Agricultural Experiment Station, and approved for publication as journal series R-10969.

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Mary Vargo and James E. Faust

hybrid impatiens to be more competitive in the landscape market. Light management within the greenhouse environment is a critical factor for stock plant production that influences cutting yield and performance ( Blanchard and Runkle, 2011 ; Tollenaar

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Emily K. Dixon, Bernadine C. Strik, and David R. Bryla

1.5 × 3 m in size and contained four plants. Weed management. The three weed management strategies were applied to each plot individually. In nonweeded plots, weeds were allowed to grow after the first year (2010) and cut to soil level just before

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Mary Joy M. Abit and Bradley D. Hanson

California nursery operations combined to produce $165.5 million in wholesale value of fruit and nut tree planting stock—a value that is multiplied severalfold by retailers and exporters ( U.S. Department of Agriculture, 2007 ). Fruit and nut tree

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David Trinka and Marvin Pritts

175 ORAL SESSION (Abstr. 687-693) FRUIT CROPS: CULTURE AND MANAGEMENT IV

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Josiah Raymer, Mack Thetford, and Debbie L. Miller

Miller, 2002 ). Management of stock plants in a nursery setting is desirable for producing a reliable and consistent source of cuttings. However, it is not presently known if container production of stock plants for this purpose is a viable alternative or

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M.E. Ostry

White pine blister rust (Cronartium ribicola J.C. Fisch.) (WPBR) was discovered on Ribes L. in New York in 1906, although it was accidentally introduced from Europe on pine (Pinus L.) seedlings. The spread of this destructive fungus has changed the forests in North America. After decades of reduced planting because of the concern over the impact of WPBR, white pine (Pinus strobus L.) is now being restored in the lake states of Minnesota, Wisconsin and Michigan. Although the potential for growing white pine is high on many sites, the disappearance of a seed source because of logging and fires means that reestablishment of white pine to these areas will require active management. A series of plantings have been established on three national forests in Minnesota and Michigan to evaluate various silvicultural treatments intended to minimize the incidence of WPBR and to compare the performance of seedlings selected for disease resistance to nonselected planting stock.

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Michael L. Parker and Eric Young

Managing vegetative growth in higher density apple systems in the Southeast can be difficult due to the longer growing season. This study was initiated in 1990 to evaluate leader management techniques that have commercial potential for high-density systems in the Southeast. `Spur Galagored', `Jonagored', and `Red Fuji' apples on Mark root-stock were planted in the four major apple production regions of western North Carolina. The three leader management techniques evaluated were weak leader renewal, banding of the leader during the growing season (snaked leader), and leader heading with partial terminal leaf removal (H + PTLR) every 25 cm of leader growth. In the third year, branching was greatest for the snaked leader. In the fifth year, no differences in trunk cross-sectional area were detected between the leader management techniques. However, yields were significantly greater for trees managed with the snaked leader. Trees with the snaked leader yielded 44 kg/tree compared to 35 and 34 kg/tree for the H + PTLR and weak leader renewal, respectively. This illustrates that leader management techniques that use pruning or vegetation removal reduce the early production required of profitable high-density systems.

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David L. Trinka

Tissue-cultured (TC) plantlets are gaining wide acceptance as the standard transplanting stock within both the fruit and nursery industry. However, research and grower experiences suggest that management practices used for conventionally propagated raspberry plants may need to be tailored for successful field establishment of the TC plantlet. The effects of weed control practices, rowcovers, and fertilizer placement on the performance of newly planted TC `Heritage' red raspberry were evaluated during two years. Weed control treatments included straw mulch (ST), black polyethylene mulch (B), white on black polyethylene mulch (WB), napropamide herbicide (N), simazine herbicide (S), hand-weeding (HW), and an untreated control (U). Rowcovers were used during the first six weeks of establishment on the mulched and hand-weeded treatments. Calcium nitrate was placed in the planting hole or on the soil surface around the plant. Second year yields were directly proportional to soil moisture levels during the summer of the planting year. Plants mulched with ST, B, or WB during the planting year produced greater early yields during the fruiting year. Primocane density was highest in the ST treatment. Rowcovers consistently increased both soil temperature and soil moisture, but tended to cause a reduction in cane length the first growing season. Fertilizer placement had no consistent effect on any measured variable.