Effect of organic production and fertilizer variables on the sensory properties of pac choi (Brassica rapa var. Mei Qing Choi) and tomato (Solanum lycopersicum var. Bush Celebrity)

2010 ◽  
Vol 90 (6) ◽  
pp. 981-988 ◽  
Author(s):  
Martin Talavera-Bianchi ◽  
Edgar Chambers IV ◽  
Edward E Carey ◽  
Delores H Chambers
Keyword(s):  
Solanum Lycopersicum ◽  
Brassica Rapa ◽  
Organic Production ◽  
Sensory Properties ◽  
Pac Choi

Relation between Developmental Stage, Sensory Properties, and Volatile Content of Organically and Conventionally Grown Pac Choi (Brassica rapa var. Mei Qing Choi)

2010 ◽  
Vol 75 (4) ◽  
pp. S173-S181 ◽  
Author(s):  
Martin Talavera-Bianchi ◽  
Koushik Adhikari ◽  
Edgar Chambers IV ◽  
Edward E. Carey ◽  
Delores H. Chambers
Keyword(s):  
Developmental Stage ◽  
Brassica Rapa ◽  
Sensory Properties ◽  
Volatile Content ◽  
Pac Choi

scholarly journals Homeopathic and high dilution preparations for pest management to tomato crop under organic production system

2012 ◽  
Vol 30 (1) ◽  
pp. 51-57 ◽  
Author(s):  
Tatiani A Modolon ◽  
Pedro Boff ◽  
Mari Inês C Boff ◽  
David José Miquelluti
Keyword(s):  
Solanum Lycopersicum ◽  
Production System ◽  
Leaf Spot ◽  
Block Design ◽  
Organic Production ◽  
Field Conditions ◽  
High Dilution ◽  
Tomato Crop ◽  
Arnica Montana ◽  
Septoria Leaf Spot

Tomato crops (Solanum lycopersicum) under conventional production system are constantly treated against pest and diseases, with organic synthetic pesticides that are used may cause serious disturbance to environment and human health. This research was carried out in order to study the effect of homeopathic and high dilution preparations on pests and diseases management of tomato crop under organic production system. Two experiments were conducted under field conditions and one in greenhouse. All of them in randomized block design with the cultivar Santa Cruz Kada. The treatments consisted of homeopathic preparations Staphysagria, Arsenicum album, Sulphur, Arnica montana, high dilution preparations of Solanum lycopersicum and Solanum aculeatissimum, at the decimal (DH) or centesimal (CH) scale of hahnemanian high dilution. Bordeaux mixture, cupric preparation, and Bacillus thuringiensis were also included in weight doses. The preparation Arnica montana 12DH increased the tomato yield under field conditions. The damage incidence of small borer was efficiently reduced with applications of Sulphur 12CH that equalling to B. thuringiensis. The same treatment did not reduce the large borers. B. thuringiensis reduced also the septoria leaf spot incidence in the field. In greenhouse, the high dilution preparation of tomato at 12DH completely suppressed the septoria leaf spot and drastically reduced the same disease at 24DH. The homeopathic and high dilution preparations have the potential to be effective on replacing pesticides that are used on tomato, and could be suitable to fill legal requirement for organic production system.

scholarly journals (473) Influences of Fertilizer Source and Insecticide Application on Phenolic Compounds in Pac Choi (Brassica rapa L.)

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1092C-1092
Author(s):  
Xin Zhao ◽  
Edward Carey ◽  
James Nechols ◽  
Kim Williams ◽  
Weiqun Wang
Keyword(s):  
Phenolic Compounds ◽  
Brassica Rapa ◽  
Phenolic Content ◽  
Block Design ◽  
Organic Fertilizer ◽  
Total Phenolic ◽  
Fertilizer Treatment ◽  
Insecticide Application ◽  
Head Weight ◽  
Pac Choi

Implications of dietary phenolic compounds for human health and disease prevention have been indicated by a body of literature. A greenhouse pot study was performed to investigate the impacts of fertilizer source and preventive insecticide application on phenolic compound levels in pac choi [Brassica rapa (L.) cv. Mei Qing]. A two-way randomized complete-block design with five replications was used in this experiment. Fertilizer source consisted of two levels: conventional fertilizer (pre-plant application of Osmocote slow-release fertilizer), and organic fertilizer (pre-plant application of vermicompost and fertigation with compost tea and fish emulsion). Insecticide application consisted of three levels: organic (pyrethrin) vs. conventional (permethrin), and a plain water control. At harvest, total phenolics and individual phenolic compounds in pac choi leaves (blades) were analyzed by Folin assay and HPLC, respectively. Head weight of pac choi was significantly higher under conventional fertilizer treatment, while it was not affected by insecticides. Total phenolic content of pac choi was significantly increased by organic fertilizer treatment. HPLC results indicated that organic fertilizer treatment resulted in significantly higher levels of individual phenolic compounds, including chlorogenic acid and ferulic acid. In contrast, preventive insecticide application showed little effect on the phenolics in pac choi. Correlation analysis excluded the influence of plant size (head weight) on phenolic content in pac choi. Differential N-forms, rates of nutrient release, and/or variable nutrient content in organic and conventional fertilizer treatments may contribute to elevated phenolic content in organically fertilized pac choi.

EFECTO DE DIFERENTES ABONOS ORGÁNICOS EN LA PRODUCCIÓN DE TOMATE (Solanum lycopersicum, L)/ EFFECT OF DIFFERENT ORGANIC FERTILIZERS ON THE PRODUCTION OF TOMATO (Solanum lycopersicum, L)

Biotecnia ◽  
2016 ◽  
Vol 18 (3) ◽  
pp. 33-36
Author(s):  
Ricardo Augusto Luna Murillo ◽  
Juan José Reyes Pérez ◽  
Kleber Augusto Espinosa Cunuhay ◽  
Marcelo Vicente Luna Murillo ◽  
Fiamma Valeria Luna Quintana ◽  
...  
Keyword(s):  
Solanum Lycopersicum ◽  
Production Systems ◽  
Block Design ◽  
Positive Influence ◽  
Organic Production ◽  
Organic Fertilizers ◽  
Control Treatment ◽  
Vegetable Production ◽  
Solanum Lycopersicum L ◽  
Randomized Block Design

Entre los sistemas de producción orgánica bajo condiciones controladas, la producción de hortalizas con aplicación de enmiendas es una práctica que se ha extendido a escala mundial. El objetivo del presente estudio fue evaluar los efectos de los abonos orgánicos sobre algunas variables de producción en plantas de tomate. Las evaluaciones se realizaron a los 65 días después del trasplante, utilizándose abonos orgánicos edáficos y foliares y un tratamiento control. Los tratamientos fueron aplicados una vez sembradas las plantas a los 30 días, siguiendo un diseño experimental de bloques al azar. Sobre la base de los resultados obtenidos se comprobó que a los 65 días después de la siembra, los abonos humus de lombriz más ácido húmico tienen una influencia positiva sobre el número y peso total de frutos; el tratamiento bocaschi más ácido húmico fue superior al diámetro del fruto. ABSTRACTAmong the organic production systems under controlled conditions, vegetable production with application of amendments is a practice that has spread worldwide. The aim of this study was to evaluate the effects of organic fertilizers on some production variables tomato plants. Evaluations were performed at 65 days after transplantation, using different soil and foliar organic fertilizers and a control treatment. The treatments were applied once planted plants at 30 days, following an experimental randomized block design. Based on the results obtained it was found that at 65 days after sowing, the humus fertilizer more acids plus humic have a positive influence on the total number of fruits, and the total weight of fruits, and treatment bocaschi plus humic acid was higher in the diameter of the fruit.

scholarly journals A Novel Graft between Pac Choi (Brassica rapa var. chinensis) and Daikon Radish (Raphanus sativus var. longipinnatus)

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1464 ◽  
Author(s):  
Tian Gong ◽  
Zachary T. Ray ◽  
Kylee E. Butcher ◽  
Zachary E. Black ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Brassica Rapa ◽  
Raphanus Sativus ◽  
Dry Weight ◽  
Horticultural Crops ◽  
Spad Value ◽  
Unique Model ◽  
Raphanus Sativus L ◽  
Below Ground ◽  
Pac Choi ◽  
Canopy Size

Vegetable grafting has primarily been used in the commercial production of high-value crops in the Solanaceae and Cucurbitaceae families. In this study, we explored the feasibility of making a novel graft between pac choi (Brassica rapa L. var. chinensis) and daikon radish (Raphanus sativus L. var. longipinnatus) to create a plant with harvestable pac choi leafy vegetable above-ground, and a daikon radish taproot below-ground. ‘Mei Qing Choi’ pac choi (scion) was grafted onto ‘Bora King’ daikon radish (rootstock). Grafted pac choi–daikon radish plants did not show a decrease in SPAD value, canopy size, leaf number, leaf area, or above-ground weight compared with self-grafted pac choi plants. However, taproot formation was reduced in grafted pac choi–daikon radish plants, as shown by decreased taproot length, diameter, fresh weight, and dry weight compared with non- and self-grafted daikon radish plants. Surprisingly, grafting with radish increased the photosynthetic rate of the pac choi. This pilot study demonstrated the potential of creating a new pac choi–daikon radish vegetable product to help save growing space and minimize waste at consumption, as pac choi roots are not eaten and radish leaves are usually discarded. The inter-generic grafting between B. rapa var. chinensis and R. sativus var. longipinnatus could also provide a unique model system to help elucidate scion-rootstock synergy and above- and below-ground sink competition in horticultural crops.

scholarly journals Consumer preference for chicken breast may be more affected by information on organic production than by product sensory properties

2013 ◽  
Vol 92 (3) ◽  
pp. 820-826 ◽  
Author(s):  
F. Napolitano ◽  
C. Castellini ◽  
S. Naspetti ◽  
E. Piasentier ◽  
A. Girolami ◽  
...  
Keyword(s):  
Consumer Preference ◽  
Organic Production ◽  
Sensory Properties ◽  
Chicken Breast

scholarly journals Effect of culture filtrates of pathogenic and antagonistic fungi on seed germination of some economically important vegetables

2019 ◽  
Vol 6 (12) ◽  
pp. 133-139 ◽  
Author(s):  
Shazia Parveen ◽  
Abdul Hamid Wani ◽  
Mohd Yaqub Bhat
Keyword(s):  
Seed Germination ◽  
Solanum Lycopersicum ◽  
Brassica Rapa ◽  
Culture Filtrate ◽  
Fusarium Solani ◽  
Raphanus Sativus ◽  
Pathogenic Fungi ◽  
Germination Percentage ◽  
Penicillium Expansum ◽  
Culture Filtrates

The subject of present study was to check whether the pathogenic fungi that were associated with different rot diseases of fruits and vegetables and the antagonistic fungal species produce extracellular growth regulating substances. For this present study healthy seeds of four economically important crop plants, viz. Solanum lycopersicum, Brassica rapa, Raphanus sativus and Trigonella melongena were selected. The results showed that all the pathogenic fungi except Fusarium solani decrease the germination percentage of the all seeds. Solanum lycopersicum seed germination was completely inhibited by the culture filtrate of Trichothecium roseum and Alternaria alternata. Likewise, the culture filtrate of Penicillium expansum caused complete inhibition of the germination of Brassica rapa seeds. The culture filtrate of Fusarium solani was found to increase the germination percentage of all the seeds tested during the present study. Amongst the three Trichoderma spp., T. asperellum and T. harzianum culture filtrate effectively increases the seed germination percentage of all the seeds tested while the culture filtrate of T. viride have negative effect on the germination percentage of Solanum lycopersicum, Brassica rapa, and Raphanus sativus seeds. This stimulatory or inhibitory effect of the culture filtrates can be attributed to the presence of certain metabolites/substances that the test fungi have released in the medium. To identify the substances present and the nature of these substances further studies will be carried out.

scholarly journals Analysis of Salt Tolerance in Nine Leafy Vegetables Irrigated with Saline Drainage Water

2000 ◽  
Vol 125 (5) ◽  
pp. 658-664 ◽  
Author(s):  
Michael C. Shannon ◽  
Catherine M. Grieve ◽  
Scott M. Lesch ◽  
John H. Draper
Keyword(s):  
Salt Tolerance ◽  
Brassica Rapa ◽  
Spinacia Oleracea ◽  
Drainage Water ◽  
Leafy Vegetables ◽  
Sand Culture ◽  
Yield Reduction ◽  
Chemical Compositions ◽  
Swiss Chard ◽  
Pac Choi

Saline agricultural drainage water may be used as a resource to grow high value horticultural crops and reduce the volume of drainage for eventual disposal. To explore reuse options the effects of salinity and timing of application were tested on selected leafy vegetables grown in 24 sand culture plots in Riverside, Calif. The leafy winter vegetables included `Ruby Red Chard' Swiss chard [Beta vulgaris L. var. flavescens (Lam.) Lam.], `Space' spinach (Spinacia oleracea L.), `Vitamin Green' salad greens [Brassica rapa L. (Narinosa Group)], `Red Giant' mustard greens [Brassica juncea L. (Czerniak)], pac choi [Brassica rapa L. (Chinensis Group)], `Winterbor' kale [Brassica oleracea L. (Acephala Group)], tatsoi [Brassica rapa L. (Narinosa Group)], `Salad King' curly endive (Cichorium endivia L.), and `Red Preco No. 1' radicchio (Cichorium intybus L.). All vegetables were planted at the same time and irrigated initially with tap water and nutrients. At 3 and 7 weeks after seeding (application times), six salinity treatments were initiated by adding salts to the irrigation water to represent the chemical compositions of drainage waters found typically in the San Joaquin Valley, Calif. The six salinity treatments had electrical conductivities of 3 (control), 7, 11, 15, 19, or 23 dS·m-1. A randomized complete block design was used with (6 salinities × 2 application times × 2 replications). Within each plot a 1.5-m row of each of the nine vegetables was grown as split plots. Salinity reduced fresh weight (FW) yields of all species. Salt stress applied at 3 weeks after seeding reduced FWs for seven of the nine vegetables compared to salination at 7 weeks. Analyses of salt tolerance curves, maximum yields, and the point of 50% yield reduction (C50) were conducted. Greens produced the highest biomass at 874 g/plant, but was the most affected by application time. Swiss chard and radicchio were not significantly affected by timing of salinity application, and Swiss chard was the most salt tolerant overall. Greens, kale, pac choi, and to a lesser extent, tatsoi, have potential as winter-grown, leafy vegetables in drainage water reuse systems.

scholarly journals Effect of Nitrogen Source on Pac Choi (Brassica rapa L.) Chemistry and Interactions with the Diamondback Moth (Plutella xylostella L.)

HortScience ◽  
2012 ◽  
Vol 47 (10) ◽  
pp. 1457-1465 ◽  
Author(s):  
Wendy A. Johnson ◽  
Raymond A. Cloyd ◽  
James R. Nechols ◽  
Kimberly A. Williams ◽  
Nathan O. Nelson ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Brassica Rapa ◽  
Plutella Xylostella ◽  
Organic Fertilizer ◽  
Diamondback Moth ◽  
Secondary Compounds ◽  
Fertility Treatment ◽  
Primary And Secondary Metabolism ◽  
Fitness Parameters ◽  
Pac Choi

Two greenhouse studies were conducted to examine effects of nitrogen source on primary and secondary metabolism of pac choi (Brassica rapa L. subsp. chinensis cv. Mei Qing Choi) and diamondback moth (Plutella xylostella L.) consumption, development, survival, and body weight. Applications of a liquid organic source of nitrogen (fish hydrolysate fertilizer) were compared with a conventional fertilizer to determine whether nitrogen source directly impacts pac choi chemistry (elemental composition and phenolics) and biomass and indirectly affects diamondback moth fitness parameters. There was no significant effect of fertility treatment on pac choi chemistry or biomass with the exception of percent leaf phosphorus, which was significantly higher in the conventional fertility treatment, and p-coumarin, which was significantly higher in the organic fertility treatment. Diamondback moth also affected plant chemistry. Both calcium (Ca) and magnesium (Mg) were significantly higher in plants infested with larvae compared with uninfested plants. Fertilizer affected diamondback moth fitness with percent survival and cohort development significantly reduced on pac choi associated with the organic fertilizer. However, pac choi receiving the organic treatment was similar in regard to primary nutrients and secondary compounds compared with plants that received a conventional fertilizer.

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