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Brian K. Hogendorp, Raymond A. Cloyd, and John M. Swiader

Although silicon is not an essential element, it is taken up by plants but is rarely quantified. Therefore, this study quantified the silicon concentration in 10 commonly grown horticultural plants including meadow sage (Salvia ×sylvestris), tickseed (Coreopsis verticillata), garden phlox (Phlox paniculata), New England aster (Symphyotrichum novae-angliae), Chinese astilbe (Astilbe chinensis), coral flower (Heuchera hybrid), garden zinnia (Zinnia elegans), French marigold (Tagetes patula), sweet basil (Basil spp.), and rosemary (Rosmarinus officinalis) using a plant alkaline fusion technique, which involved dry-ashing plant tissue samples and measuring color development with a spectrophotometer. Both zinnia and aster accumulated substantially more silicon from the municipal water source and growing medium (5365 and 4797 mg·kg−1 silicon, respectively) than the other plants evaluated, which had concentrations less than 2500 mg·kg−1 silicon. This study is just one of a few in which the silicon concentration in various horticultural plants has been quantified. Consequently, this may lead to better understanding those plants that will or will not benefit from applications of silicon-based fertilizers to promote cold-hardiness and/or plant resistance to fungal pathogens and insect pests.

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Brian K. Hogendorp and Raymond A. Cloyd

Sanitation, which includes removing plant and growing medium debris, is an important component of any greenhouse or nursery pest management program. However, there is minimal quantitative information on how sanitation practices can reduce pest problems. In this study, conducted from May through Nov. 2005, we evaluated plant and growing medium debris as a source of insect pests from four greenhouses located in central Illinois. Two 32-gal refuse containers were placed in each greenhouse with a 3 × 5-inch yellow sticky card attached to the underside of each refuse container lid. Each week, yellow sticky cards and plastic refuse bags were collected from the containers and insects captured on the yellow sticky cards were identified. Insects captured on the yellow sticky cards were consistent across the four greenhouses with western flower thrips (Frankliniella occidentalis), fungus gnats (Bradysia spp.), and whiteflies (Bemisia spp.) the primary insects present each week. Insect numbers, in order of prevalence on the yellow sticky cards, varied across the four locations, which may be related to the type of plant debris discarded. For example, extremely high numbers of adult whiteflies (range = 702 to 1930) were captured on yellow sticky cards in one greenhouse each month from August through November. This was due to the presence of yellow sage (Lantana camera), bee balm (Monarda didyma), garden verbena (Verbena × hybrida), common zinnia (Zinnia elegans), sage (Salvia spp.) and fuchsia (Fuschia spp.) debris that was heavily-infested with the egg, nymph, pupa, and adult stages of whiteflies. High western flower thrips adult numbers in the greenhouses were generally associated with plant types such as marguerite daisy (Dendranthema frutescens) and pot marigold (Calendula officinalis) disposed while in bloom with opened yellow flowers, which contained adult western flower thrips. Based on the results of this study, it is important that greenhouse producers timely remove plant and growing medium debris from greenhouses or place debris into refuse containers with tight-sealing lids to prevent insect pests from escaping.

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Joseph Tychonievich and Ryan M. Warner

. Diwan-Rinzler, N. Zohary, D. 1990 Genetic affinities and essential oil composition of Salvia officinalis L., S. fruticosa Mill., S. tomentosa and their hybrids Flavour Fragrance J. 5 121 123 10.1002/ffj.2730050213 Sanchez-Gomez, P. Soriano-Cano, M

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Rebekah C.I. Maynard and John M. Ruter

S. fruticosa , S. hispanica , and S. officinalis have been used culinarily ( Cvetkovikj et al., 2015 ; Ullah et al., 2016 ). Most notably, Salvia is used as an ornamental plant to attract pollinators, including bees, butterflies, and birds, to

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F. Todd Lasseigne, Stuart L. Warren, Frank A. Blazich, and Thomas G. Ranney

oranges to cobalt blues and rich purples ( Compton, 1994 ; Matschat, 1935 ). The European salvias, best known from S. officinalis L. (common sage), the sage of culinary and herbal uses, also offer several striking ornamental species ( Dweck, 2000

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Victoria M. Anderson, Douglas D. Archbold, Robert L. Geneve, Dewayne L. Ingram, and Krista L. Jacobsen

compound production ( Selmar, 2008 ; Selmar and Kleinwaechter, 2013 ). This may protect the plant from damage induced under stress conditions. For example, the medicinal plants Rosmarinus officinalis L. and Salvia officinalis L. produce more essential

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Rebekah C.I. Maynard and John M. Ruter

Salvia officinalis ( Göttig et al., 2017 ). Essential oil content is low in S. coccinea . However, increasing essential oil production in the species may deter southern pink moth with an environmental benefit and reduced production cost. Essential oil

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Yanjun Guo, Terri Starman, and Charles Hall

liner trays and salvia ( Salvia officinalis ) ‘Red Hot Sally II’ seedlings grown in 128 plug trays with four seedlings per plug were received and transplanted on 15 Mar. 2018. All plants were purchased from Tagawa Greenhouses, Inc. (Denver, CO), and

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Valtcho D. Zheljazkov and Tess Astatkie

phytoextraction seem to be Indian mustard [ Brassica juncea (L.) Czern.], clary sage ( Salvia sclarea L.), garden sage ( Salvia officinalis L.), lavender ( Lavandula angustifolia L.), sunflower ( Helianthus annuus L.), scented geranium ( Pelargonium sp

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Weiguang Yi and Hazel Y. Wetzstein

members of the family have high phenolic and antioxidant content such as basil ( Ocimum basilicum ), lemon balm ( Melissa officinalis ), sweet marjoram ( Origanum majorana ), oregano ( Origanum vulgare ), peppermint, rosemary, sage ( Salvia officinalis