scholarly journals Arthropod Pests and Tomato Value Chain: Review of Research Cocktails in Nigeria

2020 ◽  
pp. 1-8
Author(s):  
Adeola Abiola Oso
Keyword(s):  
Value Chain ◽  
Leaf Miner ◽  
Economic Damage ◽  
Yield Reduction ◽  
Leaf Miners ◽  
Government Interventions ◽  
Self Sufficiency ◽  
Fruit Borer ◽  
Arthropod Pests ◽  
Nutritional Benefits

Background: Tomato is an essential and remunerative staple food widely grown and consumed in all parts of Nigeria. The northern parts of the country produce ninety-eighth percent of the tomatoes consumed annually. However, higher percentages of tomatoes produced in these regions are lost due to gaps recorded in its value chain. Principal Findings: Tomato value chain needs to be strengthened from production to processing, preservation and good marketing structure. Challenges bedevilling tomato value chain in Nigeria include poor accessibility to production inputs such as seeds, nurseries, fertilizers; poor packing systems and transportation problems; marketing challenges and yield reduction caused by a complex of arthropod pests attacking the crop. The major arthropod pests inflicting economic damage on tomato include fruit borer, whitefly, aphid, thrips and leaf miners. Interventions: Considering the Nigerian Government’s recent interventions: “close border”, increased tariffs on the importation, and different incentives such as “tax holiday” and introduction of zero percent import duty on greenhouse equipment, soft loans through Bank of Agriculture as well as a national collaborative effort against the menace of tomato leaf miner (Tuta absoluta) invasion; How much of these interjectory efforts have translated to the realization of national self-sufficiency in the tomato value chain? Conclusion: This paper highlights the general introduction of tomato, its botany, nutritional benefits, tomato value chain in Nigeria, Nigerian government interventions towards its sustainability with particular focus on research cocktails at combating the problems of arthropod pests on the tomato to identify the probable critical solutions to these harmful pests.  

scholarly journals Seasonal diversity of entomofauna, their impact and management practices in tomato fields in Meru district, Tanzania

2021 ◽  
Vol 21 (04) ◽  
pp. 17952-17971
Author(s):  
Gabriel Michael ◽  
◽  
AMS Nyomora ◽  
EF Mvungi ◽  
EM Sangu ◽  
...  
Keyword(s):  
Bemisia Tabaci ◽  
Management Practices ◽  
Insect Pests ◽  
Insect Pest ◽  
Tomato Leaf ◽  
Tuta Absoluta ◽  
Leaf Miner ◽  
Yield Reduction ◽  
Leaf Miners ◽  
Frequent Application

Tomato is a highly cultivated vegetable in Tanzania. The intensive tomato cultivation and production in Tanzania has resulted in high pests and diseases build-up. A survey to identify and quantify entomofauna diversity in different seasons and pest management practices in Meru District was conducted. In addition, a laboratory experiment was done to assess the effectiveness of commonly used pesticides SnowBecco (Thiamethoxam)and Belt (Flubendiamide) against two dominating insect pests, white flies (Bemisia tabaci (Gennadius, 1889)) and leaf miner (Tuta absoluta (Meyrick, 1917)), respectively. The results obtained revealed that, tomato fields in Meru District had significantly higher entomofauna build up during dry season than the rainy season (U0.05 (df, 24)= 45, p = 0.0441). More than 70% of all collected entomofauna were dominated by the whiteflies (Bemisia tabaci) and tomato leaf miners (Tuta absoluta) belonging to orders Hemiptera and Lepidoptera, respectively. It was also observed that, the common pesticides management practices were the use of pesticidal cocktail, broad spectrum insecticides, use of botanical pesticides, frequent application of pesticide and insecticides over dosage. Moreover, yield reduction due to whiteflies and tomato leaf miners infestation were observed in terms of reduced fruits number per plant (38 and 18.4%), fruit size (22.4 and 14.2%), and fruits weight per plant by 43.6 and 26.2%, for Bemisia tabaci and Tuta absoluta, respectively. The study showed that the recommended doses in both tested insecticides caused significant pest mortality (F0.05 (df, 19) = 4.367, p = 0.0199) and (F0.05(df, 19) = 4.761, p = 0.0147) for B. tabaci and T. absoluta, respectively, within a specified period of time. The results suggest that high insect pest infestations could be caused by factors other than development of insecticidal tolerance including inappropriate identification of insect pests due to lack of training, and inappropriate selection and application of insecticides. Consequently, frequent application of broad spectra insecticides not only increases production expenses but also disrupts agroecosystem by killing beneficial entomofauna and disrupting soil organisms that are susceptible to insecticide toxicity.

scholarly journals The Development and Promotion of Sweet Potato Yoghurt in Ghana: Implications for Sustainable Production and Consumption Policies

2020 ◽  
Vol 12 (8) ◽  
pp. 3336
Author(s):  
Eunice Adu Donkor ◽  
Emmanuel Donkor ◽  
Enoch Owusu-Sekyere ◽  
Victor Owusu
Keyword(s):  
Sweet Potato ◽  
Value Chain ◽  
Practical Implication ◽  
Food Product ◽  
Sustainable Production ◽  
Sweet Potatoes ◽  
Production And Consumption ◽  
Hedonic Modeling ◽  
Nutritional Benefits ◽  
Contingent Valuation Methods

This paper analyzes how a newly developed food product (potagurt) with nutritional and health benefits can be promoted in Ghana. We employ the hedonic modeling and contingent valuation methods to estimate monetary values attached to the product’s attributes using 400 consumers in the Ashanti, Eastern, and Greater Accra regions of Ghana. The findings reveal that consumers have positive perceptions on the health and nutritional benefits of the product. Buyers place a higher value on potagurt relative to normal yogurt. The high value attached to potagurt is mainly linked to the health, nutritional, food safety, and quality attributes of the product, as well as perception. Consumers’ socioeconomic factors such as income, educational, and awareness levels also play a significant role in explaining their choice of the product. The practical implication is that the development and promotion of potagurt could stimulate sustainable economic development through better consumer health and improvement in the livelihoods of many players in the sweet potato value chain, especially the producers of potagurt and sweet potato farmers. We conclude that the promotion of the innovative food product could contribute to sustainable production and consumption of sweet potatoes.

Field Resistance of Bacillus thuringiensis Berliner Transformed Maize to Fall Armyworm (Lepidoptera: Noctuidae) and Southwestern Corn Borer (Lepidoptera: Crambidae) Leaf Feeding

2004 ◽  
Vol 39 (3) ◽  
pp. 325-336 ◽  
Author(s):  
Craig A. Abel ◽  
Melanie C. Pollan
Keyword(s):  
Bacillus Thuringiensis ◽  
Fall Armyworm ◽  
Field Resistance ◽  
Economic Damage ◽  
Yield Reduction ◽  
Insecticidal Proteins ◽  
Corn Borer ◽  
Field Efficacy ◽  
Southwestern Corn Borer ◽  
Hybrid Maize

The fall armyworm, Spodoptera frugiperda (J. E. Smith), and the southwestern corn borer, Diatraea grandiosella (Dyar), can cause economic damage to maize, Zea mays L., grown in the southeastern United States. Maize hybrids are commercially available that have been transformed to express insecticidal crystalline proteins from Bacillus thuringiensis (Bt) Berliner. The field efficacy of seven Bt hybrids were tested for control of leaf-feeding fall armyworm and southwestern corn borer. All Bt hybrids performed better than their conventional near-isolines for control of both insects. In general, the Bt hybrids provided intermediate resistance to the fall armyworm and near immunity to the southwestern corn borer. Based on larval establishment and weights, the fall armyworm was more tolerant of the insecticidal proteins expressed by the Bt hybrids than the southwestern corn borer. There was no difference in expression of insecticidal proteins among the Bt hybrids. Bt hybrids should be advantageous for the production of maize in areas that are affected by southwestern corn borer. The moderate level of resistance in the Bt hybrids to fall armyworm should be further examined to determine if amplifying the expression of insecticidal proteins or integrating other control methods along with the use of current Bt hybrid maize is needed to protect the crop from yield reduction by this pest.

Laboratory studies of insecticides against the coffee leaf-miner Leucoptera Meyricki Ghesq. (Lepidoptera, Lyonetiidae)

1963 ◽  
Vol 54 (2) ◽  
pp. 167-174 ◽  
Author(s):  
P. E. Wheatley
Keyword(s):  
Methyl Parathion ◽  
Field Trials ◽  
Leaf Miner ◽  
Laboratory Studies ◽  
Leaf Miners ◽  
Larval Stages ◽  
Air Stream ◽  
Bioassay Technique ◽  
Coffee Leaf Miner ◽  
Future Date

The coffee leaf-miners Leucoptera meyricki Ghesq. and L. caffeina Wshbn. are serious pests of arabica coffee in Kenya. At the present time sprays containing parathion, methyl-parathion or diazinon are used extensively for their control.To facilitate preliminary investigations into various aspects of insecticidal control of the larval stages of these pests, a laboratory bioassay technique was developed. Larvae were reared on detached coffee leaves placed on moist filter paper in plastic boxes. When the larvae were in their third instar, the leaves were sprayed in a Potter tower and then kept in a moist air stream for three days before the mines were dissected to enable mortality counts to be made.Of 22 new insecticides screened, only Sumithion (O, O–dimethy1 O–(3–methy1–4–nitrophenyl) phosphorothioate) and fenthion gave mortalities higher than those achieved with diazinon. Parathion gave somewhat higher mortalities than methyl-parathion, and emulsifiable formulations of these insecticides were more effective than wettable powders. The inclusion of additional wetting agents increased the efficiency of commercial formulations of these two insecticides. These results are subject to confirmation in field trials.The mode of action of parathion was investigated. Dosage/mortality lines were constructed for parathion, methyl-parathion and diazinon so that resistance to these insecticides by L. meyricki could be detected should it develop at some future date. L. caffeina was found to be apparently more susceptible to these insecticides than L. meyricki and this was believed to be due to its greater rate of feeding.

scholarly journals Species richness and abundance of native leaf miners are affected by the presence of the invasive horse-chestnut leaf miner

2009 ◽  
Vol 12 (5) ◽  
pp. 1011-1021 ◽  
Author(s):  
Christelle Péré ◽  
Sylvie Augustin ◽  
Rumen Tomov ◽  
Long-hui Peng ◽  
Ted C. J. Turlings ◽  
...  
Keyword(s):  
Species Richness ◽  
Leaf Miner ◽  
Horse Chestnut ◽  
Leaf Miners ◽  
Species Richness And Abundance ◽  
Chestnut Leaf

scholarly journals Neochrysocharis okazakii(Hymenoptera: Eulophidae) as a Major Parasitoid Wasp of Stone Leek Leaf MinerLiriomyza chinensis(Diptera: Agromyzidae) in Central Vietnam

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Takatoshi Ueno ◽  
Dang Hoa Tran
Keyword(s):  
Field Survey ◽  
Host Density ◽  
Parasitoid Wasp ◽  
Leaf Miner ◽  
Welsh Onion ◽  
Leaf Miners ◽  
Central Vietnam ◽  
Major Pest ◽  
The Mean ◽  
Parasitoid Aggregation

Liriomyza chinensisis a major pest of Welsh onionAllium fistulosumin Asia but little is known about the abundance of its natural enemies. A field survey was made to explore the major parasitoids ofL. chinensisleaf miner in central Vietnam. An eulophid parasitoid,Neochrysocharis okazakii,comprised more than 95% of parasitoids reared from leaf miner larvae collected in the onion field and 98.3% of leaf miner parasitoids found during searches of onion plants. The mean number of femaleN. okazakiion plants was greater in onion fields with a higher density ofL. chinensis, and, during searches, a greater proportion ofN. okazakiiwas found on onion with moreL. chinensismines, suggesting density-dependent parasitoid aggregation. Melanized dead larvae ofL. chinensiswere more frequently found in onion fields with more parasitoids, demonstrating that melanized leaf miners are a good indicator of parasitoid activity. Mean instant rate of host encounter byN. okazakiiin the field was estimated at 0.077, and the likelihood of a parasitoid finding a host increased with host density. Taken together, these results show thatN. okazakiiis the major parasitoid ofL. chinensis. Usefulness of this parasitoid in stone leek leaf miner management is discussed.

scholarly journals ОЦІНЮВАННЯ ДОЦІЛЬНОСТІ ІМПОРТНОГО ЗАБЕЗПЕЧЕННЯ НАСІННЯМИ ТОВАРОВИРОБНИКІВ ОВОЧНОЇ ПРОДУКЦІЇ В БІЛОРУСІЇ

2021 ◽  
pp. 108-116
Author(s):  
Світлана Василівна Макрак
Keyword(s):  
Value Chain ◽  
System Analysis ◽  
Research Process ◽  
Comprehensive Assessment ◽  
Number Of Factors ◽  
Self Sufficiency ◽  
Financial Investments ◽  
Methodological Approaches ◽  
The Republic ◽  
High Level

The high level of import of vegetable seeds negatively affects the indicators of resource self-sufficiency of agricultural sectors. At the same time, the development of the vegetable seeds market requires significant financial investments in this segment and analysis of their further payback based on scientific approaches. The purpose of the article. To develop methodological approaches to assessing the effectiveness of import flows in relation to vegetable seeds. The object of research is vegetable seeds, the value chain in vegetable growing. Methods used in research. The theoretical and methodological basis for the study was the works of domestic and foreign scientists on import and import-substituting production. The following methods were used in the research process: monographic, abstract-logical, normative, synthesis and system analysis, etc. The hypothesis of the study. Import flows of vegetable seeds take place in the Republic of Belarus in the presence of a certain list of conditions, which requires justification of their expediency. Presentation of the main material. The article presents the author's position regarding the development of scientific and methodological approaches to assessing the feasibility of implementing import flows of vegetable seeds. Originality and practical value. The scientific novelty of the study consists in the development of a comprehensive assessment of the feasibility of zoning a certain variety of vegetables of Belarusian selection for individual management entities or its import on the basis of a number of factors and criteria. Conclusions. The development of the Belarusian market of vegetable seeds involves a comprehensive assessment of the effectiveness of seed zoning, which includes the costs of conducting scientific research and ending with the effectiveness of vegetable cultivation and their subsequent processing.

scholarly journals Energi Terbarukan dan Ekonomi Syariah: Sinergitas Mewujudkan Sustainable Development

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Azwar Iskandar ◽  
Khaerul Aqbar ◽  
Sulkifli Herman
Keyword(s):  
Sustainable Development ◽  
Renewable Energy ◽  
Value Chain ◽  
Green Economy ◽  
Easy Access ◽  
Investment Financing ◽  
Self Sufficiency ◽  
Qualitative Descriptive ◽  
Halal Food ◽  
Islamic Economic

The urgency of the availability of renewable energy, green economy and implementation of Sharia Economy actually has a spirit that is in line with the efforts of the global community in supporting sustainable development. The synergy between Sharia Economy practices in Indonesia and renewable energy programs in order to realize it becomes an inevitability. This research aims to describe the concept of synergy of Sharia Economy practices and renewable energy programs in Indonesia in order to realize sustainable development. This research is qualitative descriptive research through library study methods and content analysis. The results showed that the synergy scheme between renewable energy programs and Islamic economic/financial practices can be done in the form of: (i) sharia financial sector can be an instrument of EBT investment financing; (ii) the utilization of EBT may be a supporter and spearhead of halal industry, such as halal food and beverages, Muslim fashion, halal tourism, pharmaceuticals and halal cosmetics and halal media and recreation; and (iii) in the context of socially religious EBT financing, EBT can be done with the concept of ta'āwun and sedekaj jariah through crowd funding and waqf. In order to optimize the synergy between renewable energy programs and sharia economy, some steps and Quick Wins programs that can be done are: (1) campaigns against the excellence of renewable energy to achieve national energy self-sufficiency; (2) create easy access and attractive financing schemes to support renewable energy; (3) conduct research and publication on renewable energy and potential collaboration with other industries in the halal value chain that can be perceived in Indonesia, especially halal tourism.

scholarly journals Occurrence of the South American Tomato Leaf Miner, Tuta absoluta (Meyrick) in Southern Shan, Myanmar

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 962
Author(s):  
Sopana Yule ◽  
Ni Ni Htain ◽  
Aung Kyaw Oo ◽  
Paola Sotelo-Cardona ◽  
Ramasamy Srinivasan
Keyword(s):  
Management Practices ◽  
Tomato Leaf ◽  
Tuta Absoluta ◽  
Leaf Miner ◽  
Invasive Pest ◽  
Economic Damage ◽  
South American ◽  
The South ◽  
Tomato Production ◽  
Tomato Leaf Miner

The South American tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), one of the most important invasive insect pests affecting tomato production worldwide, was for the first time detected in Myanmar. Preliminary surveys on pest occurrence on tomato crops in Myanmar suggested the presence of T. absoluta in Southern Shan State, but there was no official survey conducted until the end of 2019. Therefore, this study aimed to confirm the presence of T. absoluta in Myanmar. The presence of T. absoluta was specifically observed in the Southern Shan State, which is the largest tomato production area in Myanmar, where tomato is grown under two cultivation methods, floating and land cultivation. The highest T. absoluta infestation was recordedat Kalaw with (82%), followed by Inle Lake (i.e., floating cultivation) (20%) and Pin Ta Ya (10%). The amount of T. absoluta larvae was significantly higher in the lower third of the plants, followed by the middle section and upper section, respectively, in three fields surveyed. Potential and severe economic damage may be expected if management practices are not in place to reduce the presence of this invasive pest. It is of immediate importance that plant protection and quarantine offices of ASEAN member states coordinate their response to T. absoluta and build their capacity to monitor the pest and develop a strategy for when it arrives. In addition, a suitable management strategy is needed to reduce the occurrence of this invasive pest.

Global value chains and state support in the aircraft industry

2014 ◽  
Vol 16 (4) ◽  
pp. 615-639 ◽  
Author(s):  
Steven McGuire
Keyword(s):  
Value Chain ◽  
Value Chains ◽  
Aircraft Industry ◽  
Barriers To Entry ◽  
Commercial Aircraft ◽  
Government Interventions ◽  
Trade Dispute ◽  
Trade Friction ◽  
The World ◽  
National Champions

The commercial aircraft industry is no stranger to trade friction, which has brought bitter international disputes over industrial policy to the World Trade Organization (WTO). Yet despite the fact that several countries, notably China, Japan and Russia have stated their intentions to develop aircraft that can compete with other countries, these efforts have not led to a trade dispute. What explains this pattern? Drawing on sources such as the Global Trade Alert database, this paper argues that that the complexity of the aircraft industry generates considerable barriers to entry. Moreover, emerging aerospace states have not repeated earlier efforts of direct subsidy, but rather, they have sought to position themselves in the global aerospace value chain, with selective government interventions designed to help national champions accumulate the necessary technical experience though collaboration with incumbent firms. However, the very diversity of government supports may make protectionist measures more difficult to identify.

Sign in / Sign up

Export Citation Format

Share Document