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Ricardo O. Russo and Graeme P. Berlyn

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Diánez Fernando, Santos Milagrosa, Carretero Francisco, and Marín Francisco

their high efficacy, although most are limited to a few species, including Trichoderma harzianum , Trichoderma Asperellum , and Trichoderma viride . Some species of Trichoderma are biostimulants, whereas others function as a control agent against

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Jackson Teixeira Lobo, Ítalo Herbert Lucena Cavalcante, Augusto Miguel Nascimento Lima, Yuri Alysson Carvalho Vieira, Pedro Igor Rodrigues Modesto, and Jenilton Gomes da Cunha

fundamental factors to reduce mango fruit loss by abscission ( Siddiq et al., 2017 ). In this context, plant biostimulants are an alternative in mango tree cultivation because they have already been widely used in agriculture with the objective of increasing

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Verónica De Luca, Diego Gómez de Barreda, Antonio Lidón, and Cristina Lull

environment ( European Union, 1991 , 2009 , respectively) may increase the use of biostimulants as replacements for many ingredients that are being rejected for use in turfgrass. However, the term “biostimulant” is wide and loosely defined ( Mueller and

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Furn-Wei Lin, Kuan-Hung Lin, Chun-Wei Wu, Yu-Sen Chang, Kuan-Hung Lin, and Chun-Wei Wu

development of tolerant genotypes and application of biostimulants that induce water-deficit tolerance in plants ( Calvo et al., 2014 ). Our study investigated the impact of plant biostimulants on the growth of the lettuce during RDI. Plant biostimulants, such

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Yan Xu and Bingru Huang

alleviate summer bentgrass decline by suppressing leaf senescence and promoting a denser turf canopy during summer months. In addition to PGRs, some biostimulant products were developed to improve turfgrass quality, especially in turf that is under

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Masoume Amirkhani, Anil N. Netravali, Wencheng Huang, and Alan G. Taylor

macronutrients ( Farooq et al., 2012 ), growth regulators ( Halmer, 2004 ), or other biostimulants. A plant biostimulant is any substance and/or microorganism applied to plants with the aim to enhance nutrition efficiency, abiotic stress tolerance, and/or crop

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Douglas C. Sanders, Jacqueline A. Ricotta, and Laurie Hodges

We determined if application of certain naturally occurring compounds would stimulate emergence, growth, and development of carrot (Daucus carota L.). The commercially available biostimulants Agro-Lig, Enersol (humic acids), and Ergostim (folic acid) were added at a concentration of 1.5% (w/v) to Laponite 508 (magnesium sulfate) gel used in fluid drilling. Agro-Lig, Enersol and Ergostim increased carrot emergence > 2-fold as measured by number of roots as compared to untreated seed. Number of carrots increased 50% to 75% when biostimulants were incorporated into the gel, compared to fluid-drilled seed without the biostimulants. When biostimulants were applied as a drench over untreated seeds sown conventionally, the average root weight obtained was more than twice that from untreated seeds.

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Joseph R. Heckman

Yield responses of `Blue Vantage' cabbage (Brassica oleracea L.) to P fertilizer and two commercially available biostimulants—ROOTS and ESSENTIAL-were evaluated on soils very high in P fertility. Head yield was not increased with P fertilizer when cabbage was transplanted into soil with Mehlich-3 soil test P indexes ≥ 112 ppm (112 mg·kg-1). Neither of the biostimlants applied as a root drench at transplanting influenced head yield or plant tissue nutrient analysis.

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J. Pablo Morales-Payan* and William M. Stall

A glycine-rich mixture of amino acids and short-chain peptides (Siapton) (3 g a.i. per L), two citokinin-rich seaweed (Ascophyllum nodosum) extracts (Stimplex and Triggrr) [50 mg·L-1, active ingredient (a.i.)], a mixture of cysteine and folic acid (Ergostim) (300 mg·L-1 a.i.), and a terpenic acid-rich Siberian fir (Abies sibirica) extract (Silk) (50 mg·L-1 a.i.) were sprayed on St. Augustinegrass residential turf at the beginning of the post-winter regrowth in Gainesville, North-Central Florida, to determine their effect on the growth and aesthetics of the lawn. Above- and belowground biomass, leaf color, and density in St. Augustinegrass were enhanced by all the biostimulants, as compared to untreated St. Augustinegrass plots. The best results were obtained, in descending order, with the cytokinin-rich seaweed extracts, the glycine-rich mixture of amino acids and short-chain peptides, the mixture of cysteine and folic acid, and the terpenic acid-rich Siberian fir extract.