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Amed N. Mamood and Dennis T. Ray

Studies were conducted to evaluate container size and pretreatment on transplant survival and growth of guayule (Parthenium argentatum Gray). Seeds of cv. 11605 were planted in a greenhouse in two different container sizes. After 60 days half of the seedlings in both treatments were clipped, and then hand transplanted into the field. The height and width of 10 plants in each treatment were measured biweekly. The percent survival, date of flowering, seed germination and weight of 1000 seeds were determined. Plants produced in large containers had a higher survival rate, plant size and flowering rate. In addition non-clipped seedling had significantly higher survival rates. There were no significant differences in seed germination or in seed weights among treatments.

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Mack Thetford, Debbie Miller, Kathryn Smith, and Mica Schneider

Survival and subsequent growth of two beach species produced in containers of differing volume and depth were evaluated following transplant on Eglin Air Force Base, Santa Rosa Island, Fla. Rooted cuttings of gulf bluestem (Schizachyrium maritimum) were produced in four container types: 1-gal (gallon), 0.75-gal treepot, 1-qt (quart), or 164-mL Ray leach tube (RLT) containers. Root and shoot biomass of gulf bluestem harvested after 12 weeks in container production were greatest for plants grown in treepot containers and root: shoot ratio decreased as container size increased. Regardless of container size, survival of beach-planted gulf bluestem was 100%. Basal area of plants from standard gallon and treepot containers was similar 11 months after transplant and basal area for plants from treepot containers remained greater than plants from quart or RLT containers. Effect of planting zone [92, 124, 170, and 200 m landward of the Gulf of Mexico (Gulf)] on transplant survival was also evaluated for inkberry (Ilex glabra). Seedling liners of inkberry were produced in 3-gal treepot or gallon containers. Inkberry was taller when grown in 3-gal treepot containers than when grown in gallon containers. Regardless of container size, all inkberry planted 92 m from the Gulf died. Inkberry survival (>75%) when grown in 3-gal treepot containers was two to six times greater than plants grown in gallon containers (15%, 50%, 40%; 124, 170, and 200 m from Gulf, respectively). After 15 months, inkberry grown in 3-gal treepot containers remained larger with 1.5 times the mean maximum height and twice the mean canopy area compared to those grown in gallon containers.

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Shawna L. Daley, Jeffrey Adelberg, and Richard L. Hassell

early growth Pesquisa Agropecu. Bras. 40 531 539 Daley, S. Wechter, W.P. Hassell, R.L. 2014 Improvement of grafted watermelon transplant survival as a result of size and starch increases over time caused by rootstock fatty alcohol treatment: Part II

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Shawna L. Daley, William Patrick Wechter, and Richard L. Hassell

Fatty alcohol treatments can be used to eliminate the meristem of cucurbit (Cucurbitaceae) rootstocks, which prevents regrowth when grafting, but the effects of the treatment on the rootstock have not been documented. Two rootstock types, ‘Emphasis’ bottle gourd (Lagenaria siceraria) and ‘Carnivor’ interspecific hybrid squash (Cucurbita maxima × C. moschata) commonly used in watermelon (Citrullus lanatus) grafting significantly increased in cotyledon and hypocotyl size over 21 days after treatment (DAT) with a 6.25% fatty alcohol emulsion. There was a significant increase in total soluble sugar (glucose, sucrose, and fructose) content for each rootstock hypocotyl and cotyledon. Starch concentrations of hypocotyls and cotyledons also increased significantly in both rootstocks. This increase in stored energy could greatly increase the success rate of the grafting process. Increased rootstock energy reserves could overcome the need for keeping the rootstock cotyledon intact when grafting.

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Nikki Hanson, Amy L. Ross-Davis, and Anthony S. Davis

Diminishing milkweed (Asclepias sp.) populations are contributing to the conspicuous decline of the iconic monarch butterfly (Danaus plexippus). This research sought to improve milkweed propagation success, a core component of summer habitat restoration projects. Specifically, this research assessed the effects of container volume and fertilizer application rate on growth and first year field survival of two species of milkweed common to western North America, namely showy milkweed (A. speciosa) and narrowleaf milkweed (A. fascicularis). Generally, larger roots and shoots developed when plants were given the high rate of fertilizer (6.5 g·L−1) and when reared in the largest containers (2600 mL). For narrowleaf milkweed, nearly all plants developed a firm plug (i.e., one in which the root system remained intact when removed from the container) after 22 weeks. Most narrowleaf milkweed plants flowered 15 weeks after sowing when grown in the largest container with either the low (2.7 g·L−1) or high fertilizer rate or the midsized container (444 mL) with a high rate of fertilizer. For showy milkweed, a firm plug developed for nearly all individuals by the end of the growing season only when given the high fertilizer rate. None of the showy milkweed plants developed an inflorescence by 15 weeks. Results of this research improve our understanding of milkweed propagation and will aid in the efforts to restore the monarch butterfly’s summer breeding habitat by providing propagation protocols across a range of stocktypes.

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Kristine M. Lang, Ajay Nair, and Alexander G. Litvin

-farm due to the simplicity of the splice grafting method and the potentially high survival rate of transplants postgrafting (Buajaila et al., 2018). When proper grafting techniques are used, grafted tomato transplant survival after healing has been shown to

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William B. Thompson, Jonathan R. Schultheis, Sushila Chaudhari, David W. Monks, Katherine M. Jennings, and Garry L. Grabow

( Wilson, 1970 ). Environmental conditions such as precipitation and initial soil moisture have been shown to be the key components for transplant survival and storage root set in sweetpotato ( Gajanayake et al., 2013 ; Thompson et al., 2017 ). Soil

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Victoria J. Ackroyd and Mathieu Ngouajio

cover crops in 2009. Cash crop stand establishment, transplant survival, and yield. Muskmelon stand varied with year, but within individual years, the impact of the treatments was consistent ( Table 3 ). In 2008, plots in methyl bromide and control

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Wenjing Guan, Dean Haseman, and Dennis Nowaskie

. Conclusions This study supported previous observations that grafting can be a valuable tool for enhancing early-season high tunnel cucumber production in the Midwest United States. Regardless of the rootstocks, grafted plants ensured transplant survival, even

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Pinki Devi, Scott Lukas, and Carol A. Miles

Sept. 2019 < http://www.winetech.co.za/documents/plantmaterial/plantmaterialquality.pdf > Johnson, G. 2012 Can Antitranspirants and Antidesiccants Improve Vegetable Transplant Survival? Weekly Crop Update, University of Delaware Cooperative Extension