scholarly journals ANALYTICAL STUDY OF THE EFFICIENCY OF MARKETING SOME VEGETABLE CROPS IN SHARKIA GOVERNORATE )FIELD STUDY ON TOMATO CROP(, In Arabic

2021 ◽  
Vol 26 (3) ◽  
pp. 415-432
Author(s):  
Baraa Morsi ◽  
Ibrahim Ismail ◽  
Morad Khalil
Keyword(s):  
Field Study ◽  
Analytical Study ◽  
Vegetable Crops ◽  
Tomato Crop

scholarly journals Leaf shape is a predictor of fruit quality and cultivar performance in tomato

2019 ◽  
Author(s):  
Steven D. Rowland ◽  
Kristina Zumstein ◽  
Hokuto Nakayama ◽  
Zizhang Cheng ◽  
Amber M. Flores ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Leaf Morphology ◽  
Negative Impact ◽  
Positive Impact ◽  
Leaf Shape ◽  
Sugar Content ◽  
Crop Improvement ◽  
List Type ◽  
Vegetable Crops ◽  
Tomato Crop

SummaryCommercial tomato (Solanum lycopersicum) is one of the most widely grown vegetable crops worldwide. Heirloom tomatoes retain extensive genetic diversity and a considerable range of fruit quality and leaf morphological traits.Here the role of leaf morphology was investigated for its impact on fruit quality. Heirloom cultivars were grown in field conditions and BRIX by Yield (BY) and other traits measured over a fourteen-week period. The complex relationships among these morphological and physiological traits were evaluated using PLS-Path Modeling, and a consensus model developed.Photosynthesis contributed strongly to vegetative biomass and sugar content of fruits but had a negative impact on yield. Conversely leaf shape, specifically rounder leaves, had a strong positive impact on both fruit sugar content and yield. Cultivars such as Stupice and Glacier, with very round leaves, had the highest performance in both fruit sugar and yield. Our model accurately predicted BY for two commercial cultivars using leaf shape data as input.This study revealed the importance of leaf shape to fruit quality in tomato, with rounder leaves having significantly improved fruit quality. This correlation was maintained across a range of diverse genetic backgrounds and shows the importance of leaf morphology in tomato crop improvement.

scholarly journals Isolation and Identification of Tomato Wilt Pathogen Under Green House Conditions in Tripoli Area

2019 ◽  
pp. 327-337
Author(s):  
Khayriyah Misbah Dayab ◽  
Najat Khalifa ElGariani
Keyword(s):  
Wilt Disease ◽  
Agricultural Products ◽  
Vegetable Crops ◽  
Surrounding Area ◽  
Isolation And Identification ◽  
Tomato Crop ◽  
The Third ◽  
Tomato Roots ◽  
Solanaceae Family ◽  
Tomato Wilt

The tomato crop is Lycopersico esculentum L. of the Solanaceae family. The considered world's first among the vegetable crops in terms of cultivated area annually. It is the third most important agricultural products after wheat and barley and the second most important vegetable crops after potatoes in Libya. The study aimed to isolate and identify the cause of tomato wilt disease its under greenhouse conditions. Four Fusarium oxysporum isolates were obtained from tomato roots and surrounding area growing under protected agricultural conditions at Janzour and Ein Zara in Tripoli- libay. The fungus were more frequent at Ein Zara area (37%), compared with Janzour (22%).

scholarly journals Identification of plant families associated with the predators Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) and Hippodamia convergens Guérin-Menéville (Coleoptera: Coccinelidae) using pollen grain as a natural marker

2010 ◽  
Vol 70 (2) ◽  
pp. 293-300 ◽  
Author(s):  
MA Medeiros ◽  
PA Ribeiro ◽  
HC Morais ◽  
M Castelo Branco ◽  
ER Sujii ◽  
...  
Keyword(s):  
Food Resource ◽  
Pollen Grains ◽  
Federal District ◽  
Reproductive Capacity ◽  
Vegetable Crops ◽  
Hippodamia Convergens ◽  
Tomato Crop ◽  
Predator Species ◽  
Crop Fields ◽  
Poaceae Family

The predators Hippodamia convergens Guérin-Menéville (Coleoptera: Coccinelidae) and Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae), are frequently observed on vegetable crops, especially on tomato plants, as well as on flowers of several plants around crop fields. It is well known that when predators feed on pollen and nectar they can increase their longevity and reproductive capacity. The objective of this work was to identify plants that could be a pollen source for H. convergens and C. externa in order to develop strategies to attract and keep these predators in vegetable fields like the tomato crop. Adults of C. externa (53 individuals) and H. convergens (43 individuals) were collected in fields from 2004-2005 at Embrapa Hortaliças, Brasília, Federal District. The insects were processed by the acetolysis method and pollen from them was extracted and identified. A total of 11335 grains of pollen belonging to 21 families were extracted from C. externa. A total of 46 pollen grains belonging to ten families were extracted from H. convergens. The Poaceae family was the most abundant one for C. externa while Asteraceae was the commonest pollen for H. convergens. The importance of pollen from different plant species as a food resource for each predator species gives an indication of the importance of plant community structure inside and around crop fields for the establishment of these predator populations and to enhance conservation biological control.

scholarly journals The economic of production of vegetable crops grown in northern Omdurman, Khartoum State Sudan

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Abd Allah Tariq Bashir
Keyword(s):  
Potato Crop ◽  
Cost Ratio ◽  
Vegetable Crops ◽  
Gross Margin ◽  
Tomato Crop ◽  
Benefit Cost Ratio ◽  
Cost Item ◽  
Benefit Cost ◽  
Gross Margins ◽  
Margin Analysis

The economic of production of vegetable crops grown in northern Omdurman, Khartoum State Sudan This study was carried out to estimate the profitability in terms of gross margins ol'the main vegetable crops grown in the area. Sampled farmers were randomly selected through a field survey during 2006/2007 agricultural season, and the collected data was subjected to descriptive statistics and gross margin analysis, in addition to the estimation of the benefit cost ratio. The results revealed that the vegetable crops under investigation arc profitable to farmers. Tomato crop scored the highest gross margin, followed by onion and lastly potato crop. Agricultural operation was the highest cost item for onion and tomato crops, while the agricultural inputs recorded the highest item for potato crop

Effects of calcium carbonate application on physiology, yield and quality of field-grown tomatoes in a semi-arid Mediterranean climate

2018 ◽  
Vol 69 (4) ◽  
pp. 411 ◽  
Author(s):  
Cristina Patanè ◽  
Alessandra Pellegrino ◽  
Isabella Di Silvestro
Keyword(s):  
Calcium Carbonate ◽  
Mineral Particle ◽  
Vegetable Crops ◽  
Marketable Yield ◽  
Tomato Crop ◽  
Horticultural Crops ◽  
Beneficial Effects ◽  
Leaf Transpiration ◽  
Quality Aspects ◽  
Semi Arid

Foliar and fruit application of mineral particle films is considered to reduce damage from heat and water stress significantly in many horticultural crops. Sprays with new formulations consisting of suspensions of calcium carbonate can have beneficial effects on vegetable crops, including tomato. We assessed the effects of a calcium carbonate suspension on physiology, yield and some quality aspects of a tomato crop under three levels of deficit irrigation (I50, moderate; I25, moderate–severe; I0, severe) in the semi-arid climate of eastern Sicily. Leaf transpiration was significantly reduced by 47% (late June) and 58% (early July) in plants treated with the suspension. Late in the growing season, sprayed leaves were ~1°C cooler than unsprayed (control) leaves. Spray treatment resulted in a higher marketable yield (+12%) than the control under I50, and fruit quality was significantly improved under I0. Treated tomatoes exhibited better firmness (+24%), higher contents of vitamin C (+15%) and total phenols (+12%), and higher antioxidant activity (5–7%) than untreated tomatoes. Application of calcium carbonate minimised fruit losses under I50 while ensuring great water saving and improving the nutraceutical properties of fruits. These aspects make the technology an environmentally friendly tool to improve crop sustainability and nutritional quality in tomato.

scholarly journals EFFECTS OF HIGH-PRESSURE SODIUM AND METAL HALIDE SUPPLEMENTAL LIGHTING ON GROWTH, YIELD AND GAS EXCHANGES OF VEGETABLE CROPS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 641c-641
Author(s):  
J. Charbonneau ◽  
Y. De ◽  
D.-A. Demers ◽  
M. Dorais ◽  
A. Gosselin
Keyword(s):  
High Pressure ◽  
Growth Yield ◽  
Metal Halide ◽  
Growth And Yield ◽  
Vegetable Crops ◽  
Tomato Crop ◽  
Gas Exchanges ◽  
Yield And Quality ◽  
The Difference

The objective of the experiments was to compare the performance of metal halide (MH) and high-pressure sodium (HPS) lamps on growth and yield of vegetables. Four experiments with lettuce were carried out. The lettuce grown under HPS lamps had a head firmness higher than under MH lamps. The difference between the type of lamps on fresh weight was not very constant with the period of production. There was no interaction between lamp and cultivar. Two experiments were carried out with tomato in Spring and Fall 1991. For a tomato crop, the yield and quality of the fruit were not affected by the type of lamps. Photosynthesis and transpiration of tomato and pepper plants were measured under MH and HPS lamps. No significant differences were found between both lamps under two humidity conditions and four PPFs. Under high humidity conditions, transpiration under MH was higher than under HPS.

Bioefficacy of horticultural mineral oil against spider mite, Tetranychus truncatus Ehara (Prostigmata: Tetranychidae) on okra

ENTOMON ◽  
2020 ◽  
Vol 44 (4) ◽  
pp. 301-306
Author(s):  
Kavya Yadav ◽  
Haseena Bhaskar ◽  
Madhu Subramanian
Keyword(s):  
Field Study ◽  
Untreated Control ◽  
Spider Mite ◽  
Mineral Oil ◽  
Mite Population ◽  
Vegetable Crops ◽  
Neem Oil ◽  
High Efficacy ◽  
Combination Treatments

A field study was conducted to evaluate the efficacy of horticultural mineral oil (HMO), combination of HMO + neem oil and neem oil 2 per cent along with a synthetic acaricide, Spiromesifen 240SC and an untreated control against Tetranychus truncatus on okra during March, 2018. The plots treated with HMO at 2.5 (92.60%) and 3.0 per cent (93.90%) as well as combination treatments HMO 2.5 per cent + neem oil 2.0 per cent (94.14%) and HMO 3.0 per cent + neem oil 2.0 per cent (96.79%) recorded significant reduction in mite population and were superior to plots treated with either spiromesifen (91.08%) or neem oil alone at 2.0 per cent (90.42%). The high efficacy of HMO against the spider mite T. truncatus brought out in the study suggests that HMO can be an effective tool for mite management in vegetable crops.

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