scholarly journals ROLE OF Chrysoperla carnea (Stephens) RELEASE IN THE BIOCONTROLLING OF Cassida vittata Vill. AND Scrobipalpa ocellatella Boyd. LARVAE AS WELL AS ENHANCING THE ASSOCIATED ARTHROPOD PREDATOR POPULATIONS IN COMPARISON WITH CONVENTIONAL INSECTICIDES APPLICATIONS IN SUGAR BEET FIELDS

2018 ◽  
Vol 45 (6) ◽  
pp. 2357-2365
Author(s):  
Fatma Hegazy
2021 ◽  
Vol 14 (2) ◽  
pp. 128-150
Author(s):  
Nicole A. Jacoberger

This article examines the contrasting evolution in sugar refining in Jamaica and Barbados incentivized by Mercantilist policies, changes in labor systems, and competition from foreign sugar revealing the role of Caribbean plantations as a site for experimentation from the eighteenth through mid-nineteenth century. Britain's seventeenth- and eighteenth-century protectionist policies imposed high duties on refined cane-sugar from the colonies, discouraging colonies from exporting refined sugar as opposed to raw. This system allowed Britain to retain control over trade and commerce and provided exclusive sugar sales to Caribbean sugar plantations. Barbadian planters swiftly gained immense wealth and political power until Jamaica and other islands produced competitive sugar. The Jamaica Assembly invested heavily in technological innovations intended to improve efficiency, produce competitive sugar in a market that eventually opened to foreign competition such as sugar beet, and increase profits to undercut losses from duties. They valued local knowledge, incentivizing everyone from local planters to chemists, engineers, and science enthusiasts to experiment in Jamaica and publish their findings. These publications disseminated important findings throughout Britain and its colonies, revealing the significance of the Caribbean as a site for local experimentation and knowledge.


Author(s):  
Vesna Ž. Popović ◽  
Jonel V. Subić ◽  
Nataša Ž. Kljajić

The Srem district is home to producers of corn, oilseeds, sugar beet and tobacco, a leading region in the production of pome fruits (apples, pears) and drupes (plums, peaches, cherries) in the country and a perspective area for the development of organic plant and livestock production in protected areas. The current irrigation policy in the Republic of Serbia was not directed at systematic water use with the goal of forming an optimal structure of a market propulsive and a highly profitable agricultural production. The authors in the paper analyse the structure of agricultural production in the Srem district in Serbia and its market potentials as well as the economic effects of irrigation in light of the planned integral irrigation system construction in the Srem district in order to reflect economic benefits of irrigation and its role in the development of agriculture.


1993 ◽  
Vol 44 (4) ◽  
pp. 801-806 ◽  
Author(s):  
SUSAN K. CROSTHWAITE ◽  
GARETH I. JENKINS
Keyword(s):  

2019 ◽  
Vol 20 (15) ◽  
pp. 3777 ◽  
Author(s):  
Seyed Abdollah Hosseini ◽  
Elise Réthoré ◽  
Sylvain Pluchon ◽  
Nusrat Ali ◽  
Bastien Billiot ◽  
...  

Numerous studies have demonstrated the potential of sugar beet to lose the final sugar yield under water limiting regime. Ample evidences have revealed the important role of mineral nutrition in increasing plant tolerance to abiotic stresses. Despite the vital role of calcium (Ca2+) in plant growth and development, as well as in stress responses as an intracellular messenger, its role in alleviating drought stress in sugar beet has been rarely addressed. Here, an attempt was undertaken to investigate whether, and to what extent, foliar application of Ca2+ confers drought stress tolerance in sugar beet plants exposed to drought stress. To achieve this goal, sugar beet plants, which were grown in a high throughput phenotyping platform, were sprayed with Ca2+ and submitted to drought stress. The results showed that foliar application of Ca2+ increased the level of magnesium and silicon in the leaves, promoted plant growth, height, and leaf coverage area as well as chlorophyll level. Ca2+, in turn, increased the carbohydrate levels in leaves under drought condition and regulated transcriptionally the genes involved in sucrose transport (BvSUC3 and BvTST3). Subsequently, Ca2+ enhanced the root biomass and simultaneously led to induction of root (BvSUC3 and BvTST1) sucrose transporters which eventually supported the loading of more sucrose into beetroot under drought stress. Metabolite analysis revealed that the beneficial effect of Ca2+ in tolerance to drought induced-oxidative stress is most likely mediated by higher glutathione pools, increased levels of free polyamine putrescine (Put), and lower levels of amino acid gamma-aminobutyric acid (GABA). Taken together, this work demonstrates that foliar application of Ca2+ is a promising fertilization strategy to improve mineral nutrition efficiency, sugar metabolism, redox state, and thus, drought stress tolerance.


1956 ◽  
Vol 34 (1) ◽  
pp. 511-519 ◽  
Author(s):  
G. H. N. Towers ◽  
D. C. Mortimer

Of the keto acids identified in leaves of sugar beet and other plants exposed to C14O2, pyruvic acid was found to be the only one labelled in light periods up to 45 sec. α-Ketoglutaric and glyoxylic acids became radioactive after about 45 sec. Radioactive hydroxypyruvate was not identified under these conditions and labelled oxaloacetate was detected only in trace amounts after 60 sec. in Scenedesmus. In contrast glycine and serine were labelled after 10 sec. under comparable conditions and aspartic acid was appreciably labelled after 30 sec. The effect on the radioactivity of the keto acids of an additional period intracer-free air, with and without light, as well as the dark incorporation of C14O2 was studied. These results are discussed in relation to the role of the ketoacids in photosynthesis. It is concluded that the synthesis of amino acids such as glycine, serine, and aspartic acid may be effected by mechanisms other than transamination in green leaves in the light.


Author(s):  
A.C. Longland ◽  
W.H. Close ◽  
A.G. Low

The utilization of diets high in fibre (defined here as non-starch polysaccharide - NSP) is dependent on the extent to which the NSP is fermented by the gut microflora, and the subsequent utilization by the animal of the end-products of fermentation - the VFAs. It has frequently been assumed that fermentation of NSP in the pig occurs almost exclusively in the hind-gut. However, a number of studies using pigs fitted with ileal-cannulas have suggested that some fermentation of NSP may occur prior to the hind-gut (e.g. Graham et al., 1985). The aim of this study was to determine the relative roles of the small and large intestine in a) the digestion of feeds containing non-starch polysaccharides, and b) the subsequent utilization of energy by growing pigs. This was achieved by comparing the abilities of intact or ileo-rectomised pigs to digest and grow on cereal-based diets containing 0 or 300 g/kg sugar beet pulp.


2018 ◽  
Vol 62 (1 (460)) ◽  
pp. 33-43
Author(s):  
Piotr Koryś

The article discusses the role of plants in Poland’s economic development over the last 500 years. The author presents the role of five plants in the history of Poland’s development: cereals (wheat and rye), potatoes, sugar beet and rape. The specificity of the economic development of modern Europe has made Poland one of Europe’s granaries and an important exporter of cereals. This shaped the civilization of the Polish-Lithuanian Commonwealth and contributed to its fall due to institutional specificity. In the 19th century, potatoes played an important role in the population development of Polish lands, as they helped feed the rapidly growing population. The spread of sugar beet cultivation created the conditions for the development of modern sugar industry in the second half of the 19th century. It became one of the first modern branches of the food industry in Poland and contributed to the modernization of the village. Quite recently, oilseed rape was to become a plant that would bring back the times of agricultural sheikhs – no longer the nobility would trade in cereals on the European markets, but entrepreneurs producing a vegetable substitute for diesel oil.


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