scholarly journals Microgreens: A New Specialty Crop

EDIS ◽  
2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
Danielle Treadwell ◽  
Robert Hochmuth ◽  
Linda Landrum ◽  
Wanda Laughlin
Keyword(s):  
Leaf Stage ◽  
True Leaf ◽  
Specialty Crop ◽  
Minor Revision ◽  
A Minor ◽  
Salad Greens ◽  
Color Texture

Microgreens are young, tender greens that are used to enhance the color, texture, or flavor of salads, or to garnish a wide variety of main dishes. Harvested at the first true leaf stage and sold with the stem, cotyledons (seed leaves), and first true leaves attached, they are among a variety of novel salad greens available on the market that are typically distinguished categorically by their size and age. Sprouts, microgreens, and baby greens are simply those greens harvested and consumed in an immature state. This article offers production advice for greenhouse microgreen production.https://edis.ifas.ufl.edu/hs1164 This is a minor revision of Treadwell, Danielle, Robert Hochmuth, Linda Landrum, and Wanda Laughlin. 2010. “Microgreens: A New Specialty Crop”. EDIS 2010 (3). https://journals.flvc.org/edis/article/view/118552.

scholarly journals Inheritance of True Leaf Stage Downy Mildew Resistance in Broccoli

2001 ◽  
Vol 126 (6) ◽  
pp. 727-729 ◽  
Author(s):  
Min Wang ◽  
Mark W. Farnham ◽  
Claude E. Thomas
Keyword(s):  
Downy Mildew ◽  
Control Method ◽  
Recurrent Parent ◽  
Downy Mildew Resistance ◽  
Resistant Parent ◽  
Dh Population ◽  
Mildew Resistance ◽  
Leaf Stage ◽  
True Leaf ◽  
High Level

Downy mildew, incited by the biotrophic fungal parasite, Peronospora parasitica (Pers. Fr.) Fr., is one of the most destructive diseases of broccoli (Brassica oleracea L., Italica Group) and other related crop species throughout the world. Cultivation of resistant cultivars is the most desirable control method because it provides a practical, long-term, and environmentally benign means of limiting damage from this disease. The commercial hybrid cultivar, Everest, has been shown previously to contain a high level of downy mildew resistance. Doubled-haploid (DH) lines developed from that hybrid were also shown to exhibit a similar, high level of resistance at the three- to four-leaf stage. To determine the mode of inheritance of this true leaf resistance, the resistant DH line was crossed to a susceptible line (derived from `Marathon') to produce an F1 hybrid. Subsequently, F2 and backcross (BC) populations were developed from the hybrid. In addition, a DH population of ≈100 lines was developed from the same F1 used to create the F2 and BC. All populations were evaluated for response to artificial inoculation with P. parasitica at the three- to four-leaf stage. F1 plants were resistant like the resistant parent and F2 populations segregated approximately nine resistant to seven susceptible. Using the resistant parent as recurrent parent, BC populations contained all resistant plants, while the BC to the susceptible parent fit a 1 resistant: 3 susceptible segregation ratio. These results can be explained by a model with two complementary dominant genes. This model was confirmed by the DH population that segregated ≈1:3, resistant to susceptible. Due to the dominant nature of this resistance, controlling genes should be easily incorporated into F1 hybrids and used commercially to prevent downy mildew.

Degree-day models to predict carrot weevil (Coleoptera: Curculionidae) emergence and oviposition in Nova Scotia, Canada

2020 ◽  
Vol 152 (3) ◽  
pp. 374-388
Author(s):  
Suzanne Blatt ◽  
Deney Augustine Joseph ◽  
G. Christopher Cutler ◽  
A. Randall Olson ◽  
Scott White
Keyword(s):  
Nova Scotia ◽  
Adult Emergence ◽  
Hill Equation ◽  
Base Temperature ◽  
Degree Days ◽  
Eastern Canada ◽  
Leaf Stage ◽  
True Leaf ◽  
Listronotus Oregonensis ◽  
Carrot Weevil

AbstractCarrot weevil, Listronotus oregonensis (LeConte) (Coleoptera: Curculionidae), is a pest of carrot (Daucus carota var. sativus Hoffmann; Apiaceae) throughout eastern Canada. Carrot weevil emergence and oviposition were monitored in commercial carrot fields in Nova Scotia. Cumulative degree days were calculated using a base temperature of 7 °C (DD7), and models were developed to predict cumulative emergence and oviposition using nonlinear regression. Cumulative emergence and oviposition were adequately explained as functions of DD7 by a three-parameter sigmoidal Hill equation. Our emergence model predicted initial and peak adult emergence at 35 and 387 DD7, respectively, with oviposition on carrot baits occurring as early as 42 DD7. Models were then validated to evaluate how well they performed. Oviposition on carrot plants began at the fourth true-leaf stage (342 DD7) and continued until eleventh true-leaf stage. Growers using these models can identify their window of opportunity to manage their carrot weevil populations targeting the majority of emerged adults before oviposition begins in the field.

scholarly journals A Minor Revision of Hunt and Hess Scale

Stroke ◽  
2001 ◽  
Vol 32 (9) ◽  
pp. 2208-2208 ◽  
Author(s):  
George Stranjalis ◽  
Damianos E. Sakas
Keyword(s):  
Minor Revision ◽  
A Minor

Factors that Influence Germination and Mycoherbicidal Activity ofAlternaria cassiae

1991 ◽  
Vol 5 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Donald J. Daigle ◽  
Peter J. Cotty
Keyword(s):  
Relative Humidity ◽  
Phosphate Buffer ◽  
Potassium Phosphate ◽  
Tween 80 ◽  
Growth Chamber ◽  
Potassium Phosphate Buffer ◽  
Potato Dextrose Broth ◽  
Leaf Stage ◽  
True Leaf

The influences of pH, surfactants, and nutrients on germination were investigated to develop a basis for improvement ofAlternaria cassiaemycoherbicide formulations. In vitro results indicated that a formulation with a pH of approximately 6.5 containing 0.1 to 1% Tween 80, 0.02 M potassium phosphate buffer, and 1% dehydrated potato dextrose broth best promoted germination. Sicklepod plants at the 2 to 3 true-leaf stage were sprayed with test solutions, incubated in the dark at 100% relative humidity (28 C) for 6 h, and placed in a growth chamber maintained at 30 C. Assessment of the plants after 2 d indicated that the ability of the formulation components to induce germination ofAlternaria cassiaein vitro corresponded well with their ability to improve infection of sicklepod seedlings.

scholarly journals Reversal of Heat-induced Resetting in Eustoma grandiflorum with Low Temperatures

HortScience ◽  
1994 ◽  
Vol 29 (3) ◽  
pp. 165-166 ◽  
Author(s):  
Kiyoshi Ohkawa ◽  
T. Yoshizumi ◽  
M. Korenaga ◽  
K. Kanematsu
Keyword(s):  
Low Temperatures ◽  
Shoot Elongation ◽  
Rosette Formation ◽  
Continuous Illumination ◽  
Natural Light ◽  
Optimum Temperature ◽  
Eustoma Grandiflorum ◽  
Leaf Stage ◽  
True Leaf ◽  
Temperature Regimes

The effects of seedling age and temperature regimes and durations on the reversal of Eustoma grandiflorum (Raf.) Shin. heat-induced rosette formation were clarified. When E. grandiflorum seedlings were grown in a natural-light phytotron (600-800 μmol·m-2·s-1) for 4 weeks at 33/28C (12-h day/12-h night) from germination to the four true-leaf stage, the optimum temperature and duration required to break rosette formation was 15C for 4 weeks with continuous illumination (35 μmol·m-2·s-1). However, when seedlings were grown for 12 weeks at 33/28C from germination to the eight true-leaf stage. shoot elongation required 6 weeks at 10C.

scholarly journals Bermudagrass Production in Florida

EDIS ◽  
2020 ◽  
Vol 2006 (4) ◽  
Author(s):  
Carrol G. Chambliss ◽  
F. A. Johnson ◽  
Martin B. Adjei
Keyword(s):  
Publication Date ◽  
Original Publication ◽  
Minor Revision ◽  
A Minor

This document is SS-AGR-60, one of a series of the Agronomy Department, UF/IFAS Extension. Original publication date April 2000. This is a minor revision by Martin Adjei of the June 2002 version of the same title. Revised February 2006. SS-AGR-60/AA200: Bermudagrass Production in Florida (ufl.edu)

scholarly journals MICRONUTRIENT TOXICITY IN SEED GERANIUM PELARGONIUM × HORTORUM BAILEY

HortScience ◽  
1991 ◽  
Vol 26 (6) ◽  
pp. 764D-764
Author(s):  
Chi Won Lee ◽  
Chun Ho Pak ◽  
Jong Myung Choi
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Dry Matter Yield ◽  
Control Solution ◽  
Chlorophyll Contents ◽  
Leaf Stage ◽  
True Leaf ◽  
Leaf Chlorophyll ◽  
Nutrient Solutions ◽  
Fertilizer Solution

Micronutrient toxicity symptoms of seed geranium (Pelargonium × hortorum Bailey) `Ringo Scarlet' were experimentally induced by using 9 different concentrations of B, Cu, Fe, Mn, Mo and Zn in the fertilizer solution. Plants of 3-4 true leaf stage grown in peat-lite mix were constantly fed for 5 weeks with nutrient solutions containing 0.25, 0.5, 1, 2, 3, 4, 5, and 6 mM of each micronutrient. The control solution contained 20 uM B, 0.5 uM Cu, 10 uM Fe, 10 uM Mn, 0.5 uM Mo and 4 uM Zn. Visible foliar toxicity symptoms developed when the nutrient solution contained 2, 0.5, 5, 1, 0.25, and 0.5 mM, respectively, of B, Cu, Fe, Mn, Mo, and Zn. Reduction in dry matter yield was evident when 1 mM B, 2 mM Cu, 3 mM Fe, 2 mM Mn, 0.5 mM Mo, and 1 mM Zn were used in the fertilizer solution. Leaf chlorophyll contents decreased as Cu and Mn levels increased. Elevated levels of Fe increased tissue chlorophyll contents.

scholarly journals COMPARISON OF JUVENILITY IN TWO GENERA OF THE ASTERACEAE

HortScience ◽  
1991 ◽  
Vol 26 (6) ◽  
pp. 718F-718
Author(s):  
Peggy Damann ◽  
Robert E. Lyons
Keyword(s):  
The Other ◽  
Leaf Number ◽  
Leaf Stage ◽  
Perennial Plants ◽  
True Leaf

Chrysanthemum × superbum, Coreopsis lanceolata, and Coreopsis grandiflora are LD flowering perennial plants. The end of juvenility could be defined as the minimum expanded leaf number required for fastest flowering once placed in LD. This research was conducted to compare juvenility and flowering requirements in dwarf and standard cultivars of these species. Plants were maintained under SD and transferred to LD upon reaching true leaf stages beginning with 0 (cotyledons only) and progressing at 2 or 3 leaf intervals to the 24 leaf stage. Coreopsis `Sunray' and Chrysanthemum `G. Marconi' were relatively unresponsive to LD whereas LD induced flowering in 70-100% of the plants in each leaf number treatment in Coreopsis `Early Sunrise'. Plants transferred at the 15 leaf stage required the least number of LD to reach anthesis. LD promoted complete flowering in Chrysanthemum × superbum `Snow Lady' plants and 90% of the SD control plants flowered as well. SD control plants from the other 3 cultivars remained vegetative. Effects of vernalization will also be presented.

Effective barley grass (Hordeum spp.) control in annual medics with 2,2-DPA herbicide

1995 ◽  
Vol 35 (6) ◽  
pp. 725 ◽  
Author(s):  
A Wallace ◽  
PM Evans ◽  
D Bowran
Keyword(s):  
Seed Yield ◽  
Treatment Time ◽  
Growth Stages ◽  
Leaf Stage ◽  
True Leaf ◽  
Pasture Legumes ◽  
Annual Grasses ◽  
Annual Medics ◽  
Seed Yields ◽  
Spray Adjuvants

The ability of 2,2-dichloropropionic acid (2,2-DPA) to control annual grasses was examined in a 4-year-old medic (Medicago polymorpha var. brevispina cv. Circle Valley) pasture. Six rates of 2,2-DPA with and without spray adjuvants (1% spray oil + 0.25% wetting agent) were used: 0.37, 0.56, 0.74, 1.11, 1.48, 2.22 kg a.i./ha. The pasture was sprayed in July at the 4-true-leaf stage of the medic, after identifying and counting grasses and medics. Plants were counted again after spraying and grass seed heads were counted in spring. At the end of the season, medic seed yields were obtained. Nine annual pasture legumes were later evaluated for their tolerance to 2.22 kg 2,2-DPA/ha at 3 growth stages [post plant, pre-emergence (PPPE); 3-5-true-leaf stage; flowering] under weed-free conditions. A rate of 1.11 kg 2,2-DPAJha was found to reduce barley grass density by 85%. Efficacy was improved, however, with higher rates and/or the addition of spray adjuvants. Because of low silvergrass (Vulpia spp.) and ryegrass (Lolium rigidurn) plant numbers, it was not possible to assess whether 2,2-DPA controlled these species effectively. There was no effect of herbicide on medic seed yields, seed weight, seed number per pod, or seed germination. Medic seed yields were well correlated with plant density of medic but not with herbicide rates. There was a wide variation in biomass production of the 9 pasture legumes in the evaluation of tolerance, when assessed by visual rating and seed yield, with significant biomass and yield reductions at all timings of application of 2,2-DPA. Subterranean clover (Trifoliurn subterraneum L.) was the most severely affected. Generally, medic species tolerated 2,2-DPA well. Serena was the most susceptible medic cultivar at any treatment time, with seed yield reductions at the first 2 times of application. The results suggest that 2,2-DPA could be used safely on annual medics for the control of barley grass, and possibly other annual grasses.

Soil pH and Electrical Conductivity: A County Extension Soil Laboratory Manual

EDIS ◽  
2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Rao Mylavarapu ◽  
Jamin Bergeron ◽  
Nancy Wilkinson ◽  
E. A. Hanlon
Keyword(s):  
Electrical Conductivity ◽  
Soil Ph ◽  
Reference Source ◽  
Laboratory Measurements ◽  
High Quality ◽  
Laboratory Manual ◽  
Minor Revision ◽  
County Extension ◽  
A Minor

This is a minor revision with new authors.  Originally published April 1993 by E.A. Hanlon. This manual has been designed as a reference source for UF/IFAS Extension county offices offering soil pH and/ or electrical conductivity tests to their clients. This manual if followed, will assist county faculty in assuring that these laboratory measurements are done correctly with high quality assurance.https://edis.ifas.ufl.edu/ss118  

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