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Registros recuperados: 11
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A Bioeconomic Model of the Soybean Aphid Treatment Decision in Soybeans AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba.
Since its first detection in the North Central region in July 2000, the soybean aphid (Aphis glycines Matsamura) has caused considerable loss in soybean (Glycine max L.) yield, bean quality, and producer income. Discovered first in Wisconsin and then in adjoining states, it is currently distributed in 21 US states and parts of Canada. In 2003, over 42 million acres of soybean in the North Central US were infested and over 7 million acres were treated with insecticides to control soybean aphid (Landis et al. 2003). Populations exceeding 24,000 aphids per plant and 40% losses in seed yield have been reported (DiFonzo & Hines 2002). Even prior to the outbreak of 2003, the Soybean Strategic Pest Management Plan identified soybean aphid as one of the key...
Tipo: Conference Paper or Presentation Palavras-chave: Soybean aphid; Bioeconomic model; Farm Management.
Ano: 2005 URL: http://purl.umn.edu/19237
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Analyzing Growth and Welfare Effects of Public Policies in Models of Endogenous Growth with Human Capital: Evidence from South Africa AgEcon
Badibanga, Thaddee Mutumba.
Since the abolition of its Apartheid regime in 1994, South Africa has launched a massive program of education, which has been financed through resources representing on average 21% of the national budget or 7% of GDP. Today, the GDP share of public spending on education is 1.3 times the average of industrialized countries (5.4%) and almost twice that of developing countries (3.9%). In this paper, we simulate fiscal policy experiments to analyze the growth and welfare effects of a shift in the allocation of government expenditures between public spending on education and transfers as well as those of a change in the tax rate in a model of endogenous growth with human capital accumulation for the South African economy. The results of simulations demonstrate...
Tipo: Conference Paper or Presentation Palavras-chave: Fiscal Policy; Government Expenditures and Education; Growth Model; International Development; Labor and Human Capital; E62; H52; O41.
Ano: 2008 URL: http://purl.umn.edu/6431
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Dynamics of Structural Transformation: An Empirical Characterization in the Case of China, Malaysia, and Ghana AgEcon
Badibanga, Thaddee Mutumba; Diao, Xinshen; Roe, Terry L.; Somwaru, Agapi.
The paper develops a metric of structural transformation that can account for the production of new varieties of goods embodying advancements in technological know-how and design. Our measure captures the dynamics of an economy’s transformation and can be viewed as an extension of Hausmann and Klinger’s static measure. We apply our measure to four-digit-level SITC trade data of China, Malaysia, and Ghana over the period 1962–2000. The results show that two important factors characterize the rapid transformation of the Chinese economy: the high proximity of its export basket to three main industrial clusters—capital goods, consumer durable goods, and intermediate inputs—and the increase in the values of the new goods belonging to those three clusters....
Tipo: Working or Discussion Paper Palavras-chave: Structural transformation; Discovery; Technological change; International Development; F19; O14; O33; O40.
Ano: 2009 URL: http://purl.umn.edu/50004
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Dynamics of Structural Transformation: Understanding the Key Factors That Drive Innovative Activities in Selected Asian and African Countries AgEcon
Badibanga, Thaddee Mutumba; Diao, Xinshen; Roe, Terry L.; Somwaru, Agapi.
This paper develops a metric of structural transformation that can account for the production of new varieties of goods embodying advancements in technological know-how and design. Our measure captures the dynamics of an economy’s transformation and can be viewed as an extension of the static measure developed by Hausmann and Klinger (2006). We apply this measure to four digit level sitc trade data of China, Malaysia and Ghana over the period 1962-2000. The results show the rapid transformation of the Chinese economy is characterized by two important factors: the high proximity of its export basket to the three main industrial clusters – capital goods, consumer durable goods, and intermediate inputs, and the increase in the values of the new goods...
Tipo: Working or Discussion Paper Palavras-chave: Structural Transformation; Discovery; Technological Change; International Development; F19; O14; O33; O40.
Ano: 2008 URL: http://purl.umn.edu/43890
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ECONOMIC ANALYSIS OF USING A BORDER TREATMENT FOR REDUCING ORGANOPHOSPHATE USE IN SEED POTATO PRODUCTION AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba; Radcliffe, Edward B.; Carroll, Matthew; MacRae, Ian; Ragsdale, David W..
Recent research shows initial colonization of potato fields by winged green peach aphid is concentrated at field edges. This suggests that insecticides applied only to field margins during initial colonization would largely eliminate a colonizing aphid population, conserve natural enemies in the field center, and reduce insecticide use. To better understand the costs and benefits of reducing organophosphate use, the six participating growers were interviewed to ascertain their reason for participating and their satisfaction with the border only treatment method as well as their estimated net economic benefits. Five of the farms ranked cost reduction as the most important reason for participating. The sixth farm ranked reducing virus spread as the most...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 2004 URL: http://purl.umn.edu/13237
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Farmers’ Awareness and Use of IPM for Soybean Aphid Control: Report of Survey Results for the 2004, 2005, 2006, and 2007 Crop Years AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba; DiFonzo, Christina.
In response to the introduction and rapid spread of soybean aphid, farmers in the Upper Midwest were surveyed about their treatment of and knowledge about soybean aphids for crop years 2004, 2005, 2006, and 2007. Overall, the farmers showed a fairly good understanding of soybean aphids and their impact on soybeans. Over 80% said soybean aphids could be treated and repopulate in the same crop year. For 2004-2006, at least 75% of the farmers said aphids damaged their soybeans by sucking sap. However this percentage dropped to 59% for 2007 with a greater percentage pointing at a combination of damage methods. This lower percentage for 2007 may be due to a broader, randomly selected sample of farmers who received the surveys by mail versus farmers who attended...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/45803
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Farmers' Awareness and Use of IPM for Soybean Aphid Control: Results from the 2005 Survey AgEcon
Badibanga, Thaddee Mutumba; Olson, Kent D..
In response to the introduction and rapid spread of soybean aphid as a major new invasive pest of soybean in North America. A multi-state project, Soybean Aphid in the North Central US: Implementing IPM on a Landscape Scale, was initiated to help transition the North Central US soybean industry to a sustainable and ecologically-based IPM system for soybean aphid. In the first of a series of annual surveys designed to track changes in IPM implementation and adoption over time, 742 farmers in Iowa, Michigan, and Minnesota were surveyed in early 2005. Thirteen percent of the farmers indicated they had treated for soybean aphid in 2004, and they had treated an average of 50% of their soybean acreage. Overall, the farmers showed a fairly good understanding of...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/13713
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Farmers' Awareness and Use of IPM for Soybean Aphid Control: Survey Results for the 2004, 2005, and 2006 Crop Years AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba; DiFonzo, Christina.
In response to the introduction and rapid spread of soybean aphid as a major new invasive pest of soybean in North America, farmers who attended winter crop meetings in four states in North Central US were surveyed about their treatment of and knowledge about soybean aphids for crop years 2004, 2005, and 2006. Thirteen percent, 84%, and 35% of the farmers indicated they had treated for soybean aphid in 2004, 2005, and 2006, respectively. The average of the soybean acreage treated in each year was 50%, 87%, and 81%, respectively. Overall, the farmers showed a good understanding of soybean aphids and their impact on soybeans. Over 80% knew soybean aphids could repopulate and cause yield damage after an insecticide treatment. Seventy-five percent knew aphids...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/7355
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Producers' Use of Crop Borders for Management of Potato Virus Y (PVY) in Seed Potatoes AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba; Radcliffe, Edward B.; Ragsdale, David W..
Potato virus Y (PVY) is a very serious problem throughout most major seed potato producing states. Seed potato producers in Minnesota and North Dakota were surveyed in early 2005 to assess their perception of the profitability and risks associated with using crop borders to manage PVY in seed lots. Five of the 23 producers responding (a 25% response rate) said they had used crop borders in 2004. These 23 producers entered 152 seed lots into state seed certification programs. On average, producers had less than 0.1 seed lots rejected for PVY based on summer inspection. The average number of seed lots rejected in winter trials was 1.7. Of the 152 seed lots, these producers said they had entered into state seed certification programs, they reported...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/13345
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The Sophistication and Diversification of the African Agricultural Sector: A Product Space Approach AgEcon
Badibanga, Thaddee Mutumba; Ulimwengu, John M..
We use the concept of the product space to analyze the key features of the transformation process in Africa with a focus on the agricultural sector. Between 1962 and 2008, we find that both specialization and diversification occur for the overall economy and across sectors. Our findings also confirm that the transformation of the African economy is driven primarily by the increasing specialization of nonagricultural exports. However, the transformation process is still moving more slowly than that of an emerging economy such as Brazil. The index of specialization of agricultural exports grew at a modest annual rate of 2.1 percent between 1962 and 2008, compared to 5.0 percent for nonagricultural exports and 4.1 percent for the overall economy. Although...
Tipo: Working Paper Palavras-chave: Structural transformation; Diversification; Sophistication; Growth; Export; Africa; Agricultural and Food Policy; Crop Production/Industries; International Development; International Relations/Trade; Production Economics; Research and Development/Tech Change/Emerging Technologies; F19; O14; O33; O40.
Ano: 2012 URL: http://purl.umn.edu/124498
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The Value of Crop Borders for Management of Potato Virus Y (PVY) in Seed Potatoes AgEcon
Olson, Kent D.; Badibanga, Thaddee Mutumba; Radcliffe, Edward B.; Ragsdale, David W..
Potato virus Y (PVY) is a very serious problem throughout most major seed potato producing states. Seed potato producers in Minnesota and North Dakota were surveyed in early 2005 to assess their perception of the profitability and risks associated with using crop borders to manage PVY in seed lots. Twenty-three producers responded (a 25% response rate), and 5 said they had used crop borders in 2004. These 23 producers entered 152 seed lots into state seed certification programs and provided detailed information on 108. The median number of seed lots rejected for PVY was 1 per producer based on summer inspection and 0 based on winter trials. Of the 108 lots, 104 passed summer inspection for PVY. Seventy-four percent of the 89 lots sent in for the winter...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Q12; Q16; Q55.
Ano: 2006 URL: http://purl.umn.edu/25717
Registros recuperados: 11
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