Common pre- and post-harvest diseases of vegetable crops in Jamaica.

2020 ◽  
Vol 15 (057) ◽  
Author(s):  
Noureddine Benkeblia
Keyword(s):  
Leaf Spot ◽  
Early Blight ◽  
Cropping Systems ◽  
Cropping System ◽  
Gray Mold ◽  
Vegetable Production ◽  
Vegetable Crops ◽  
Foot Disease ◽  
Septoria Leaf Spot

Abstract Vegetable production in Jamaica, and throughout the world, faces many diseases that affect the yield and the quality of the fresh harvest produce. However, some diseases are more predominant than others. The most observed diseases of vegetables are anthracnose, leaf spot, club root, downy mildew, gray mold, mosaic and geminiviruses, early blight, septoria leaf spot and leaf rusts. Nevertheless, other diseases can also be found seriously affecting the grown vegetable. Greenhouse cropping systems are also affected by similar and other diseases such as septoria leaf spot, early blight, anthracnose, fusarium wilt, verticillium wilt, late blight, bacterial spot, bacterial speck, bacterial canker, gray mold, leaf mold, powdery mildew and elephant's foot disease. Although not specific to the country, other diseases are also found more frequently than others, and the frequency varies with the region and the cropping system (indoor or outdoor).

Transplanting improves the allometry and fiber quality of Bt cotton in cotton–wheat cropping system

2019 ◽  
Vol 56 (1) ◽  
pp. 26-36
Author(s):  
Muhammad Asghar Shah ◽  
Mubshar Hussain ◽  
Muhammad Shahzad ◽  
Khawar Jabran ◽  
Sami Ul-Allah ◽  
...  
Keyword(s):  
Fiber Length ◽  
Fiber Strength ◽  
Management Practice ◽  
Cropping Systems ◽  
Fiber Quality ◽  
Cropping System ◽  
Bt Cotton ◽  
Area Index ◽  
Fiber Fineness

AbstractIn cotton–wheat cropping system of Pakistan, wheat (Triticum aestivum L.) is harvested in late April; however, the optimum sowing time of Bt cotton is mid-March. This indicates a time difference of 4–6 weeks between the harvest of wheat and cotton sowing. It is hypothesized that this overlapping period may be managed by transplanting cotton seedlings (30–45 days old) in late April, after the harvest of wheat due to better performance of already established seedlings. To this end, this study was conducted to evaluate the allometric traits and fiber quality of transplanted Bt cotton after harvesting wheat in the cotton–wheat cropping system. The Bt cotton–wheat cropping systems were flat sown wheat (FSW)–conventionally tilled cotton, FSW–zero tilled cotton, ridge sown wheat–ridge transplanted cotton using 30- and 45-days-old seedlings, and bed sown wheat (BSW)–bed transplanted cotton (BTC) also using 30- and 45-days-old seedlings. The study was conducted at Vehari and Multan in Punjab, Pakistan. Bt cotton in BSW–BTC with 45-days-old seedlings showed better performance for allometric (leaf area index; (LAI), net assimilation rate; (NAR), and crop growth rate; (CGR)), seed cotton yield, and fiber traits (fiber uniformity, fiber length, fiber strength, and fiber fineness) in comparison to other treatments. Most of the fiber quality traits were positively correlated with allometric traits and biological yield (dry matter yield at maturity) at both locations, except correlations of CGR and LAI with fiber fineness and fiber length and NAR with fiber length. As plant growth and fiber quality of transplanted cotton was significantly higher than conventionally grown cotton, our data indicate transplanting is an interesting management practice for improving productivity in wheat–cotton cropping systems.

scholarly journals Intensity of angular leaf spot and anthracnose on pods of common beans cultivated in three cropping systems

2009 ◽  
Vol 33 (spe) ◽  
pp. 1931-1934 ◽  
Author(s):  
Rogério Faria Vieira ◽  
Trazilbo José de Paula Júnior ◽  
Hudson Teixeira ◽  
Clibas Vieira
Keyword(s):  
Common Bean ◽  
Leaf Spot ◽  
Cropping Systems ◽  
Cropping System ◽  
Seed Transmission ◽  
Angular Leaf Spot ◽  
Common Beans ◽  
Growth Type ◽  
Independent Trial ◽  
Set Up

With the purpose to evaluate the intensity of angular leaf spot (ALS) and anthracnose (ANT) on pods, nine genotypes of common bean were planted in three cropping systems: monocrop (MC), monocrop grown on trellises (MCT), and intercrop with maize (ICM). In MC, beans were planted 0.5 m apart. Trelisses were set up with 1.8 m high bamboos and beans were sown 0.65 m apart. In ICM, beans were planted simultaneously with maize and in its rows. This cereal was sown 1.0 m apart with four plants per meter. Each cropping system was an independent trial installed close to each other. Climbing genotypes of beans most susceptible to ALS had less diseased pods in ICM than in both MC and MCT, but the less susceptible genotypes, regardless of their growth type, as well as the susceptible bush and semiclimbing genotypes, were similarly attacked by ALS in the three systems. ANT on pods of the susceptible bean cv. Pérola was less intense in MCT than in MC, and less intense in ICM than in MCT. ANT seed transmission was 11 %, 9.1 %, and 4.4 % when seeds come from MC, MCT, and ICM, respectively.

scholarly journals An Evaluation of Summer Cover Crops for Use in Vegetable Production Systems in North Carolina

HortScience ◽  
2000 ◽  
Vol 35 (4) ◽  
pp. 600-603 ◽  
Author(s):  
Nancy G. Creamer ◽  
Keith R. Baldwin
Keyword(s):  
Cover Crops ◽  
Aboveground Biomass ◽  
Production Systems ◽  
Pennisetum Glaucum ◽  
Cropping Systems ◽  
Foxtail Millet ◽  
Vegetable Production ◽  
Vegetable Crops ◽  
Lablab Purpureus ◽  
Sorghum Sudangrass

Summer cover crops can produce biomass, contribute nitrogen to cropping systems, increase soil organic matter, and suppress weeds. Through fixation of atmospheric N2 and uptake of soil residual N, they also contribute to the N requirement of subsequent vegetable crops. Six legumes {cowpea (Vigna unguiculata L.), sesbania (Sesbania exaltata L.), soybean (Glycine max L.), hairy indigo (Indigofera hirsutum L.), velvetbean [Mucuna deeringiana (Bort.) Merr.], and lablab (Lablab purpureus L.)}; two nonlegume broadleaved species [buckwheat (Fagopyrum esculentum Moench) and sesame (Sesamum indicum L.)]; and five grasses {sorghum-sudangrass [Sorghum bicolor (L) Moench × S. sudanense (P) Stapf.], sudangrass [S. sudanense (P) Stapf.], Japanese millet [Echinochloa frumentacea (Roxb.) Link], pearl millet [Pennisetum glaucum (L). R. Br.], and German foxtail millet [Setaria italica (L.) Beauv.)]}, were planted in raised beds alone or in mixtures in 1995 at Plymouth, and in 1996 at Goldsboro, N.C. Biomass production for the legumes ranged from 1420 (velvetbean) to 4807 kg·ha-1 (sesbania). Low velvetbean biomass was attributed to poor germination in this study. Nitrogen in the aboveground biomass for the legumes ranged from 32 (velvetbean) to 97 kg·ha-1 (sesbania). All of the legumes except velvetbean were competitive with weeds. Lablab did not suppress weeds as well as did cover crops producing higher biomass. Aboveground biomass for grasses varied from 3918 (Japanese millet) to 8792 kg·ha-1 (sorghum-sudangrass). While N for the grasses ranged from 39 (Japanese millet) to 88 kg·ha-1 (sorghum-sudangrass), the C: N ratios were very high. Additional N would be needed for fall-planted vegetable crops to overcome immobilization of N. All of the grass cover crops reduced weeds as relative to the weedy control plot. Species that performed well together as a mixture at both sites included Japanese millet/soybean and sorghum-sudangrass/cowpea.

scholarly journals Profitability of Dry Season Farming of Jute Mallow (Corchorus olitorius) and Amaranth (Amaranthus cruentus) Inter and Sole Cropping Systems in Abeokuta, Nigeria

2021 ◽  
Vol 25 (3) ◽  
pp. 49-59
Author(s):  
Omolola Oladoyin Ayodeji ◽  
Jonathan Jeremiah Atungwu ◽  
James Olasupo Fadeyi ◽  
Dennis Ugochukwu Ifezue ◽  
Harvester Onyibor Okoye ◽  
...  
Keyword(s):  
Cropping Systems ◽  
Cropping System ◽  
Rate Of Return ◽  
Cost Ratio ◽  
Vegetable Production ◽  
Total Revenue ◽  
Gross Margin ◽  
Benefit Cost Ratio ◽  
Significant Difference ◽  
Benefit Cost

The study determined the profitability of three different cropping systems. Data collected include cost of fixed assets, cost of variable inputs, yields and prices of outputs. Data were subjected to budgetary technique; analysis of variance and significant means were separated using Duncan’s Multiple Range Test at 5% level of probability. Results of the gross margin analysis showed that both the intercropping and only sole Amaranth vegetable production were profitable. The intercrop production had a gross margin of N567,920/ha with a total revenue of N1, 600,000 /ha and having the highest output of 8000kg/ha while the sole Amaranth vegetable production had a gross margin of N179, 920/ha with a total revenue of N1,200,000/ha and having an output of 6000kg/ha. Also, the intercrop vegetable production had a benefit cost ratio, rate of return and gross ratio of 1.51, 0.52 and 0.66, respectively while sole Amaranth production had a benefit cost ratio, rate of return and gross ratio of 1.15, 0.15 and 0.87, respectively. The result indicates that the two vegetable productions were profitable. Further analysis revealed that intercropping did not have significant (p<0.05) effect on the growth (plant height, number of leaves) of both vegetables. However, Jute yield was significantly (p<0.01) affected by Amaranth-Jute intercropping. Both the intercrop and sole Amaranth enterprises were profitable, but there was a significant difference in the profitability of the intercrop cropping system practised as the Amaranth/Jute intercrop was more profitable. The intercrop is, therefore, recommended to farmers since it is more profitable and provides a variety of income generation for the farmer’s thereby ensuring food and income security.

scholarly journals Content of some antioxidants in intercropped maize and soybean grain

2017 ◽  
Vol 62 (1) ◽  
pp. 31-40
Author(s):  
Vesna Dragicevic ◽  
Snezana Oljaca ◽  
Milena Simic ◽  
Zeljko Dolijanovic ◽  
Branka Kresovic ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Cropping Systems ◽  
Organic Fertilizer ◽  
Cropping System ◽  
Yellow Pigment ◽  
Black Soybean ◽  
Antioxidant Content ◽  
Maize Grain ◽  
And Control

Intercropping, as a combination of different crops at the same time and the same field, enables interaction of their roots, improving plant growth and stress tolerance, thus improving nutritional quality of produced grains. The investigation was aimed to examine the effect of different cropping systems: intercropping in combination with alternating rows and alternating strips of maize and soybean, as well as single cropping, combined with different fertilization regimes (conventional, application of organic fertilizer, bio-fertilizer and control) on the antioxidant content (glutathione [GSH], phenolics and yellow pigment [YP]) in red maize and black soybean grain. Black soybean is richer in antioxidants than red maize. Season expressed the highest influence on the level of GSH, phenolics and YP in maize and soybean, while cropping system and fertilization regime influenced GSH and phenolics. The antioxidant level in grains with greater weight corresponded with an increased GSH level for maize, as well as an increased GSH and phenolic level for soybean, while smaller grains were characterised by the increased YP content. Generally, antioxidant content was increased mainly by alternating strips in maize grain and by alternating rows in soybean grain. Bio-fertilizer had the highest impact on an increase in GSH in maize grain and YP in soybean grain, while organic fertilizer was important for acquiring of GSH and phenolics in soybean grain.

scholarly journals Nutritional Quality of Triticale (×Triticosecale Wittm.) Grown under Different Cropping Systems

2017 ◽  
Vol 71 (6) ◽  
pp. 481-485
Author(s):  
Evita Straumīte ◽  
Ruta Galoburda ◽  
Lolita Tomsone ◽  
Zanda Krūma ◽  
Ilze Grāmatiņa ◽  
...  
Keyword(s):  
Nutritional Quality ◽  
Animal Feed ◽  
Cropping Systems ◽  
Radical Scavenging Activity ◽  
Starch Content ◽  
Radical Scavenging ◽  
Cropping System ◽  
Total Phenol Content ◽  
Scavenging Activity

Abstract Triticale (× Triticosecale Wittm.) is mainly used for animal feed, but recent studies have shown its possible beneficial effect for human health. The objective of this study was to investigate the nutritional quality of triticale grown under different cropping systems in Latvia. Two winter triticale varieties, ‘Inarta’ and ‘Ruja’, were cultivated in 2014 and 2015 under conventional and organic cropping systems. Protein, starch, and total dietary fibre were determined using standard methods. Ultrasound assisted extraction was used for isolation of phenolic compounds. Total phenol content (TPC) and radical scavenging activity in extracts were determined spectrophotometrically. Overall, the highest content of protein, TPC and ABTS cation scavenging activity occurred in triticale harvested in 2014, due to favourable weather conditions (warm weather and more precipitation in June–July) for accumulation of these compounds during grain filling. Higher starch content in all studied samples harvested in 2015, as compared to 2014, was explained by higher precipitation in July 2015. The type of cropping system had no significant effect (p > 0.05) on protein and starch content, while TPC, DPPH, and ABTS·+ scavenging activity was influenced by cropping system, depending on variety.

scholarly journals 157 Estimation of Environmental Impact of Two Cropping Systems Using PLANETOR

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 469B-469
Author(s):  
A. Kalo ◽  
P.H. Hoepner ◽  
S.B. Sterrett ◽  
J.F. Diem
Keyword(s):  
Soil Erosion ◽  
Environmental Impact ◽  
Cultural Practices ◽  
Cropping Systems ◽  
Weighted Average ◽  
Vegetable Production ◽  
Vegetable Crops ◽  
Resource Base ◽  
Negative Impacts

Long-term goals of reducing environmental impacts associated with agricultural activities must include economic sustainability as well as production feasibility. This study compared the potential economic and environmental impact of two specific cropping systems [wheat/soybeans (w/s) vs. selected vegetable crops with wheat/soybeans (veg/w/s)]. Profitability of w/s was lower than the veg/w/s system but demanded a smaller, less extensive resource base of labor and machinery with fewer conflicts in resource utilization rates. The PLANETOR computer program (Univ. of Minnesota) was used to analyze the potential negative environmental effects of growing a particular crop mix within these two systems. Although some of the vegetable crops exceeded the targeted soil loss tolerance value (T-value) of 3 t/ha, the weighted average of the veg/w/s system was below the target T-value for soil erosion. Analyses suggest that the profits from vegetables in the veg/w/s production more than offset the negative impacts on soil erosion and the veg/w/s system would be more economically feasible than w/s. Potential impact of pesticide leaching and runoff from vegetable production as calculated by PLANETOR was less than that from w/s. Specific cultural practices, including soil/tissue testing to manage nutrient applications, could reduce nitrogen/phosphorus movement. The veg/w/s system may offer the necessary profit margins to allow adoption of more environmentally friendly production alternative.

scholarly journals Influence of agro-ecological conditions and foliar fertilization on yield and yield components of buckwheat in conventional and organic cropping system

2013 ◽  
Vol 29 (3) ◽  
pp. 537-546 ◽  
Author(s):  
V. Popovic ◽  
V. Sikora ◽  
Dj. Glamoclija ◽  
J. Ikanovic ◽  
V. Filipovic ◽  
...  
Keyword(s):  
Crop Production ◽  
Cropping Systems ◽  
Statistical Significance ◽  
Arable Land ◽  
Cropping System ◽  
Grain Weight ◽  
Vegetable Crops ◽  
Organic System ◽  
Foliar Fertilization ◽  
1000 Grain Weight

Forgotten or neglected arable land plants, such as buckwheat, are becoming increasingly important in crop production. Grain and one seed nuts are in the usage for humans and domestic animals diet. On the fields of the Institute of Field and Vegetable Crops, Backi Petrovac, researches were conducted in terms of conventional (2010-2012) and organic cropping systems, 2012. Analysis of the average yields showed that Novosadska buckwheat variety achieved a statistically significantly higher yield in 2010th (2,996 kg ha-1) compared to the 2011th and 2012th (p <0.01). The year showed statistical significance based on the analysis of variance. The average yields of Novosadska buckwheat variety, the variant with foliar fertilization in the conventional cropping system, were significantly higher compared with the control. The average yields amounted 1.395 kg ha-1 and were higher by 214 kg ha-1, or 18.12% compared to the control. The average plants height was 144 cm. 1000 grain weight was on the average of 23.72 g for the entire experiment. Average yields in the organic cropping system were higher in variants with foliar fertilization (1322 kg ha-1) by 7% compared to the control and plants were higher by 7.28%. Plants were higher in the organic system of cultivation by 13 cm, or 9% compared with plants grown in conventional cropping system, while the yields fell for 73 kg ha-1, respectively by 5.52%. Foliar fertilizers proved to be a possible method for yield, 1000 grain weight and plant height increasing in conventional and organic cropping systems.

Development of vegetable cropping systems in the Niayes zone of Senegal

1997 ◽  
Vol 33 (01) ◽  
pp. 83-90
Author(s):  
H. De Bon ◽  
F. Faye ◽  
J. Pages
Keyword(s):  
West Africa ◽  
Cropping Systems ◽  
Vegetable Production ◽  
Vegetable Crops ◽  
Negative Effects ◽  
Pests And Diseases ◽  
The Past ◽  
Intensive Use

The importance of vegetable crops has been increasing in West Africa for the past forty years. This paper describes the evolution of intensive mixed vegetable production in the Niayes area near Dakar between 1970 and 1990. The importance of cultivation in low-lying areas with very few inputs have decreased but irrigated cropping systems have become more important due to the better adaptation of vegetative material, application of more fertilizers and better control of pests and diseases. This intensification appears to be irreversible, in spite of the negative effects of the more intensive use of land.

scholarly journals Practical Applications of Plant Biostimulants in Greenhouse Vegetable Crop Production

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1569
Author(s):  
Spyridon A. Petropoulos
Keyword(s):  
Crop Production ◽  
Cost Effective ◽  
Vegetable Production ◽  
Vegetable Crops ◽  
Vegetable Crop ◽  
Practical Applications ◽  
Positive Effects ◽  
Crop Performance ◽  
Macro Algae

The research interest on plant biostimulant applications in vegetable crop production is gradually increasing and several reports highlight the beneficial effects that such products may have not only on crop performance but also on the quality of the final product. Moreover, numerous products with biostimulatory activity are being developed which need further evaluation under variable growing conditions and different crops. Plant hydrolysates which contain amino acids and peptides have been acclaimed with several positive effects on crop performance of diverse horticultural crops, while macro-algae are also considered effective biostimulants on plants grown under stress conditions. A recent study evaluated the use of protein hydrolysates and brown macro-algae (Ascophyllum nodosum and Ecklonia maxima) as innovative and cost effective approaches for sustainable vegetable production. The present editorial provides an overview of the main findings of that study, while discussing the practical applications that biostimulants may have in the greenhouse production of vegetable crops, aiming to increase the yield and the quality of the final produce and improve crop tolerance to abiotic stressors.

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