scholarly journals Silicon Foliar Spray and Substrate Drench Effects on Plant Growth, Morphology, and Resistance to Wilting with Container-Grown Edible Species

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 263
Author(s):  
Joshua B. Tebow ◽  
Lauren L. Houston ◽  
Ryan W. Dickson
Keyword(s):  
Plant Growth ◽  
High Capacity ◽  
Foliar Spray ◽  
Greenhouse Experiment ◽  
Growth Morphology ◽  
Crop Species ◽  
Greenhouse Production ◽  
Foliar Sprays ◽  
Edible Species ◽  
Edible Crops

The objective of this study was to evaluate silicon (Si) foliar spray and substrate drench effects on plant growth and morphology for container-grown edible crops during greenhouse production, as well as resistance to plant wilting during post-production. In the first greenhouse experiment, basil received Si foliar sprays at 0, 50, 100, 200, and 400 mg∙L–1 Si. In the second greenhouse experiment, Si was applied as either a foliar spray (500 mg∙L–1 Si) or substrate drench (100 mg∙L–1 Si) with six edible crop species. Supplemental Si increased shoot Si levels but had minimal effects on plant growth and morphology, except for parsley, which resulted in distorted growth and phytotoxicity. In the first experiment, 200 and 400 mg∙L–1 Si foliar sprays increased plant resistance to wilt by 2.2 and 2.5 d, respectively; however, this was not observed in the second experiment. All species accumulated Si with the control (no Si) treatments, indicating trace amounts of Si were taken up from the substrate, fertilizer, spray surfactant, and irrigation water. Only cucumber was classified as a Si “accumulator” with a high capacity for Si uptake. Results emphasize the need to conduct preliminary trials with supplemental Si to avoid issues of phytotoxicity.

scholarly journals Controlling Height and Seedling Emergence of French Marigold and Celosia Plugs with Plant Growth Regulators

2006 ◽  
Vol 24 (3) ◽  
pp. 165-168
Author(s):  
Stanislav V. Magnitskiy ◽  
Claudio C. Pasian ◽  
Mark A. Bennett ◽  
James D. Metzger
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Seedling Emergence ◽  
Foliar Spray ◽  
Seedling Height ◽  
Foliar Sprays ◽  
Spray Applications

Abstract Soaking French marigold seeds in growth regulator solutions produced larger reductions in seedling height than foliar sprays. Seeds soaked in 1 to 5 ppm uniconazole solutions for 0.15, 5, or 45 min resulted in plants that were up to 23% shorter than controls at 30 DAS, whereas foliar applications of 10 to 20 ppm uniconazole solutions resulted in plants 18% shorter than controls at 14 DAS. French marigold seedlings from seeds soaked in 60 pm ancymidol for 5 or 45 min were 5 or 6%, respectively, shorter than controls. Foliar spray applications of 25 or 100 ppm ancymidol to French marigold seedlings resulted in plants 8% shorter than controls. Chlormequat solutions applied either as a seed soak (1000–5000 ppm) or foliar spray (500–3000 ppm) did not reduce French marigold seedling height. Emergence of French marigold seedlings from seeds soaked in uniconazole, ancymidol, or chlormequat solutions was not different from that of control seeds. No effect on seedling height or emergence was found when soaking celosia seeds in uniconazole, ancymidol, or chlormequat solutions. Spraying celosia seedlings with uniconazole, ancymidol, or chlormequat solutions did not reduce seedling height.

scholarly journals Pot Sunflower Growth and Flowering Responses to Foliar Applications of Daminozide, Paclobutrazol, and Uniconazole

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 438D-438
Author(s):  
Brian E. Whipker ◽  
Shravan Dasoju
Keyword(s):  
Plant Growth ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Foliar Spray ◽  
Growth Retardant ◽  
Height Control ◽  
Foliar Sprays ◽  
Treatment Interaction ◽  
Total Plant

Plant growth retardant (PGR) foliar spray treatments (mg•liter–1) of daminozide at 1000 to 16,000; paclobutrazol from 5 to 80; and uniconazole from 2 to 32 were applied to `Pacino' pot sunflowers (Helianthus annuus) to compare their effectiveness at chemical height control. When the first inflorescence opened, the number of days from seeding until flowering, total plant height measured from the pot rim to the top of the inflorescence, inflorescence diameter, and plant diameter were recorded. Total plant height, plant diameter, inflorescence diameter, and days until flowering were significant for the PGR treatment interaction. Marketable-sized plants grown in the 1.2-liter pots were produced with uniconazole concentrations between 16 and 32 mg•liter–1 or with daminozide concentrations between 4000 and 8000 mg•liter–1. Paclobutrazol foliar sprays up to 80 mg•liter–1 had little effect and higher concentrations or medium drench treatments should be considered.

scholarly journals Interaction Effect between Phosphorus and Zinc on their Availability in Soil in Relation to their Contents in Stevia (Stevia rebaudiana)

2005 ◽  
Vol 5 ◽  
pp. 490-495 ◽  
Author(s):  
Kuntal Das ◽  
Raman Dang ◽  
T. N. Shivananda ◽  
Pintu Sur
Keyword(s):  
Plant Growth ◽  
Interaction Effect ◽  
Foliar Spray ◽  
Stevia Rebaudiana ◽  
Antagonistic Effect ◽  
Indian Institute ◽  
Greenhouse Experiment ◽  
Available P ◽  
Zn Content ◽  
Horticultural Research

A greenhouse experiment was conducted at the Indian Institute of Horticultural Research (IIHR), Bangalore to study the interaction effect between phosphorus and zinc on their availability in soil in relation to their contents in stevia (Stevia rebaudiana). The results show that the amount of available P and Zn content in soil has been found to increase initially and, thereafter, the amount of the same decreased with the progress of plant growth up to 60 days irrespective of treatments. The amount of P and Zn in soils showed an increase with their separate applications either as soil or foliar spray while that of the same value significantly decreased both in soils and plants due to their combined applications, suggesting a mutual antagonistic effect between Zn and P affecting each other’'s availability in soil and content in the stevia plant.

scholarly journals Flurprimidol Substrate Drenches and Foliar Sprays Control Growth of `Blue Champion' Exacum

2006 ◽  
Vol 16 (2) ◽  
pp. 354-356
Author(s):  
Brian E. Whipker ◽  
Ingram McCall ◽  
Brian A. Krug
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Untreated Control ◽  
Foliar Spray ◽  
Foliar Sprays ◽  
Control Growth ◽  
Exacum Affine

Flurprimidol was applied as a foliar spray (12.5, 25.0, 37.5, 50.0, or 62.5 mg·L-1) or as a substrate drench (0.015, 0.03, 0.06, 0.12, or 0.24 mg/pot a.i.) to determine its efficacy on `Blue Champion' exacum (Exacum affine). Flurprimidol substrate drenches were more consistent in controlling plant growth than foliar sprays. Substrate drenches of 0.03 mg/pot a.i. or foliar sprays ≥50 mg·L-1 resulted in smaller plant heights and diameters than the untreated control. With the use of flurprimidol, exacum growers have another plant growth regulator (PGR) available to control excessive growth.

scholarly journals Potted Sunflower Growth and Flowering Responses to Foliar Applications of Daminozide, Paclobutrazol, and Uniconazole

1998 ◽  
Vol 8 (1) ◽  
pp. 86-88 ◽  
Author(s):  
Brian E. Whipker ◽  
Shravan Dasoju
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Foliar Spray ◽  
Growth Retardant ◽  
Height Control ◽  
Foliar Sprays ◽  
Significant Difference ◽  
Main Effect ◽  
Total Plant ◽  
Pollen Number

Plant growth retardant (PGR) foliar sprays (in mg·L−1) of daminozide at concentrations from 1,000 to 16,000; paclobutrazol from 5 to 80; and uniconazole from 2 to 32 were applied to `Pacino' potted sunflowers (Helianthus annuus L.) to compare their effectiveness at chemical height control. Plants were grown in 650-mL or 1.2-L pots. When the first inflorescence started to shed pollen, number of days from seeding until anthesis, total plant height measured from the pot rim to the top of the inflorescence, inflorescence diameter, and plant diameter were recorded. There was no significant difference in plant height between `Pacino' plants grown in 650-mL or 1.2-L pots. Total plant height, plant diameter, inflorescence diameter, and days until flowering were significant for the PGR treatment main effect. Marketable-sized plants grown in the 1.2-L pots were produced with uniconazole concentrations from 16 to 32 mg·L−1 or with daminozide concentrations from 4,000 to 8,000 mg·L−1. Paclobutrazol foliar sprays up to 80 mg·L−1 had little effect, and higher foliar spray concentrations or substrate drench treatments may be needed to effectively control height.

scholarly journals Benzyladenine and Cyclanilide Promote Shoot Development and Flowering of ‘Moonbeam’ Coreopsis

2009 ◽  
Vol 27 (3) ◽  
pp. 176-182
Author(s):  
M.E. Farris ◽  
G.J. Keever ◽  
J.R. Kessler ◽  
J.W. Olive
Keyword(s):  
Foliar Spray ◽  
Shoot Development ◽  
Flower Buds ◽  
Greenhouse Production ◽  
Foliar Sprays

Abstract Effects of cyclanilide (CYC) and benzyladenine (BA) applied as foliar sprays or substrate drenches on the growth and flowering of ‘Moonbeam’ coreopsis (Coreopsis verticillata L. ‘Moonbeam’) during greenhouse production were determined. A foliar spray or substrate drench of 250 to 2000 ppm BA promoted increased numbers of vegetative shoots, reproductive shoots, and flower buds that increased with concentration. With BA concentrations of 250 or 500 ppm, flowering was delayed by 7 days or less and any foliar chlorosis was transient. Flowering delays of up to 19 days and persistent foliar chlorosis occurred in plants treated with 1000 or 2000 ppm BA. CYC applied at 25 to 100 ppm promoted fewer vegetative and reproductive shoots and flower buds than did BA; however, compared to control plants, plants developed more flower buds with no flowering delay, except when applied as a 100 ppm drench. Plants treated with CYC foliar sprays or substrate drenches developed twisted and horizontal growing shoots that persisted until full flower and detracted from the plants' appearance.

scholarly journals Ornamental Cabbage and Kale Growth Responses to Daminozide, Paclobutrazol, and Uniconazole

2001 ◽  
Vol 11 (2) ◽  
pp. 226-230 ◽  
Author(s):  
James L. Gibson ◽  
Brian E. Whipker
Keyword(s):  
Plant Growth ◽  
Brassica Oleracea ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Spray ◽  
Growth Responses ◽  
Height Control ◽  
Foliar Sprays ◽  
Industry Standard

Ornamental cabbage and kale (Brassica oleracea var. acephala) plants of cultivars Osaka White and Nagoya Red were treated with paclobutrazol and uniconazole as foliar sprays or substrate drenches. These treatments were compared to the industry standard of daminozide foliar sprays. Applying drenches of paclobutrazol (a.i.) at 4 mg/pot or uniconazole (a.i.) at 1 mg/pot (28,350 mg = 1.0 oz) resulted in 6% or 17%, respectively, shorter `Osaka White' plants while a 2 mg/pot paclobutrazol drench or a uniconazole drench at 0.25 mg/pot resulted in 25% shorter `Nagoya Red' plants. Although effective, the expense of substrate drenches for both plant growth regulators (PGRs) would not be economically feasible for growers to use. Paclobutrazol foliar sprays at concentrations of up to 80 mg·L-1 (ppm) were ineffective in controlling plant height and diameter of either `Osaka White' or `Nagoya Red'. A uniconazole foliar spray of 16 mg·L-1 resulted in 17% shorter `Nagoya Red' plants and 6% shorter `Osaka White' plants. A daminozide foliar spray of 2500 mg·L-1, sprayed twice, resulted in 21% shorter plants for both cultivars. Spraying daminozide would provide optimal height control for the retail grower. Although spraying daminozide twice controlled plant height and costs half the amount of an uniconazole spray at 16 mg·L-1, plant diameter was not affected with daminozide, therefore a wholesale grower who would desire a smaller diameter plant should use a uniconazole spray of 16 mg·L-1.

scholarly journals Characterization of Plant Growth-Promoting Traits and Inoculation Effects on Triticum durum of Actinomycetes Isolates under Salt Stress Conditions

Soil Systems ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 26
Author(s):  
Rihab Djebaili ◽  
Marika Pellegrini ◽  
Massimiliano Rossi ◽  
Cinzia Forni ◽  
Maria Smati ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Salt Stress ◽  
Plant Growth ◽  
Durum Wheat ◽  
Growth And Development ◽  
Indole Acetic Acid ◽  
Greenhouse Experiment ◽  
Hydrocyanic Acid ◽  
In Vitro Assays

This study aimed to characterize the halotolerant capability, in vitro, of selected actinomycetes strains and to evaluate their competence in promoting halo stress tolerance in durum wheat in a greenhouse experiment. Fourteen isolates were tested for phosphate solubilization, indole acetic acid, hydrocyanic acid, and ammonia production under different salt concentrations (i.e., 0, 0.25, 0.5, 0.75, 1, 1.25, and 1.5 M NaCl). The presence of 1-aminocyclopropane-1-carboxylate deaminase activity was also investigated. Salinity tolerance was evaluated in durum wheat through plant growth and development parameters: shoot and root length, dry and ash-free dry weight, and the total chlorophyll content, as well as proline accumulation. In vitro assays have shown that the strains can solubilize inorganic phosphate and produce indole acetic acid, hydrocyanic acid, and ammonia under different salt concentrations. Most of the strains (86%) had 1-aminocyclopropane-1-carboxylate deaminase activity, with significant amounts of α-ketobutyric acid. In the greenhouse experiment, inoculation with actinomycetes strains improved the morpho-biochemical parameters of durum wheat plants, which also recorded significantly higher content of chlorophylls and proline than those uninoculated, both under normal and stressed conditions. Our results suggest that inoculation of halotolerant actinomycetes can mitigate the negative effects of salt stress and allow normal growth and development of durum wheat plants.

scholarly journals Evaluation of Foliar Sprays of Bacteriophages for the Management of Bacterial Canker in Greenhouse Tomatoes

2009 ◽  
Vol 10 (1) ◽  
pp. 19 ◽  
Author(s):  
David M. Ingram ◽  
Shi-En Lu
Keyword(s):  
Total Yield ◽  
Foliar Spray ◽  
Bacterial Canker ◽  
Symptom Development ◽  
Plant Mortality ◽  
Greenhouse Tomato ◽  
Disease Progress ◽  
Foliar Sprays ◽  
Greenhouse Tomatoes

AgriPhage applied as a preventative foliar spray significantly reduced severity of bacterial canker of greenhouse tomato in two of three years. Area under the disease progress curves (AUDPC) indicated that AgriPhage slowed the progression of bacterial canker symptom development by 50% and 59% in 2006 and 2007, respectively. Plant mortality was significantly reduced by 76% in 2006 as compared to the inoculated control. AgriPhage-treated plants produced significantly greater total yield in 2006 only. Copper and Kasumin sprays also significantly reduced severity (AUDPC) of bacterial canker in 2007 as compared to the inoculated control. However, none of these treatments reduced symptom development or increased yield in 2008. Accepted for publication 9 April 2009. Published 12 May 2009.

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