SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Adams, Damian C.; Lee, Donna J..

We present a bioeconomic model of three invasive aquatic plants (hydrilla, water hyacinth, and water lettuce) in 13 large Florida lakes, and simulate one-year and steady-state impacts of three control scenarios. We estimate that the steady-state annual net benefit of invasive plant control is $59.95 million. A one-year increase in control yields steady-state gains of $6.55 million per year, and a one-year lapse causes steady-state annual losses of $18.71 million. This model shows that increased control of hydrilla, water hyacinth, and water lettuce is optimal.

Tipo: Journal Article

Palavras-chave: Aquatic plants; Bioeconomics; Invasive species; Lakes; Maintenance control; Q57; Q26; Q28; Q51; Q25.

Ano: 2007

URL: http://purl.umn.edu/37139

Intra-Industry Trade, Multilateral Trade Integration, and Invasive Species Risk

Tu, Anh Thuy; Beghin, John C..

We analyze the linkage between protectionism and invasive species (IS) hazard in the context of two-way trade and multilateral trade integration, two major features of real-world agricultural trade. Multilateral integration includes the joint reduction of tariffs and trade costs among trading partners. Multilateral trade integration is more likely to increase damages from IS than predicted by unilateral trade opening under the classic Heckscher-Ohlin-Samuelson (HOS) framework because domestic production (the base susceptible to damages) is likely to increase with expanding export markets. A country integrating its trade with a partner characterized by relatively higher tariff and trade costs is also more likely to experience increased IS damages via...

Tipo: Working or Discussion Paper

Palavras-chave: Exotic pest; Intra-industry trade; Invasive species; Liberalization; Trade cost; Trade integration; Trade protection; Two-way trade; Environmental Economics and Policy; International Relations/Trade.

Ano: 2006

URL: http://purl.umn.edu/18505

Simulating the U.S. Impacts of Alternative Asian Soybean Rust Treatment Regimes

Johansson, Robert C.; Livingston, Michael J.; Westra, John V.; Guidry, Kurt M..

Asian soybean rust (rust) is an emerging issue in U.S. crop production and was identified in nine states during 2004. Recent farm surveys indicate that many producers are adjusting their management practices to the possibility of a rust infestation. The economic and environmental impacts of such adjustments are not known in the medium run given these new developments. We combine 2005 data on the geographical distribution of the fungal pathogen that causes rust with 2005 information on the availability and material costs of fungicides to analyze three treatment strategies. Our results indicate a higher range of economic impacts than previous research has indicated, but are consistent with earlier findings indicating that rust infestations will likely...

Tipo: Journal Article

Palavras-chave: Asian soybean rust; Invasive species; Phakopsora pachyrhizi; Preventative and curative fungicides; Crop Production/Industries.

Ano: 2006

URL: http://purl.umn.edu/10186

MODELING THE EFFECT OF SPATIAL EXTERNALITIES ON INVASIVE SPECIES MANAGEMENT

A Dynamic Principal-Agent Model of Human-Mediated Aquatic Species Invasions

McKee, Gregory J..

Changes in production conditions associated with biological invasions can be complex. As a result, modeling invasive species management decisions can be difficult. Modeling these decisions is further compounded by externalities associated with spatial relationships among growers. In order to calculate optimal management decisions, an accurate bioeconomic model of the feedback between grower decisions and the new biological interactions created by an invasive species population is needed. In this paper, a bioeconomic model is used to explicitly analyze how externalities caused by spatial relationships among agricultural producers affect optimal invasive species management decisions. The example of the coordinated greenhouse whitefly management in the...

Tipo: Working or Discussion Paper

Palavras-chave: Invasive species; Strawberry; Greenhouse whitefly; Externality; Optimal management.; Resource /Energy Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/23626

MacPherson, Alexander J.; Moore, Rebecca; Provencher, Bill.

This paper presents a dynamic principal-agent model of aquatic species invasions in which a manager, concerned about the spread of invasive species across lakes by boaters, sets interseasonal management controls on a lake-by-lake basis, and boaters make a series of intraseasonal trip decisions to maximize random utility during the course of the season, conditional on the controls imposed by the manager. The results of a simulated invasion of Eurasian watermilfoil (Myriophyllum spicatum) highlight interesting aspects of the optimal management policies under two different management objectives: maximizing boater welfare and minimizing milfoil spread.

Tipo: Journal Article

Palavras-chave: Invasive species; Random utility model; Eurasion watermilfoil; Dynamic optimiza-tion; Principal-agent; Resource /Energy Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/10189

Exotic Forest Insects and Residential Property Values

Holmes, Thomas P.; Murphy, Elizabeth A.; Bell, Kathleen P..

This paper presents a case study of the economic damages to homeowners in a northern New Jersey community due to an exotic forest insect--the hemlock woolly adelgid. Hedonic property value methods are used to estimate the effect of hemlock health on property values. A statistically significant relationship between hemlock health and residential property values is established. Moreover, there are some signs of spillover impacts from hemlock decline, as negative effects are realized on the parcels where the declining hemlock stands are located as well as on neighboring properties. These results give some indication of the benefits of potential control programs and strategies and also show support for community- or neighborhood-based programs in residential...

Tipo: Journal Article

Palavras-chave: Invasive species; Economic impacts; Hedonic property values; General spatial model; Land Economics/Use.

Ano: 2006

URL: http://purl.umn.edu/10187

Analysis of Farm Household Preferences in the Management of Invasive Species: The Case of Miconia in Hawaii

Chan-Halbrendt, Catherine; Yang, Fang; Thomas, Lynna; Pant, Archana.

A major threat to Hawaii's ecosystem is the spread of invasive plant species. One such species is Miconia calvescens. Given that this plant was originally introduced to Hawaii by the horticulture industry and has negative effects on agricultural productivity, it is logical to find the farm households' preference for the control of Miconia. Using Conjoint Choice Experiment methodology, this study designed a survey to measure farm households' preferences for Miconia calvescens control program attributes. Results of the surveys indicate that the farm households are willing to support Miconia control programs if they prevent severe soil erosion and loss of biodiversity.

Tipo: Journal Article

Palavras-chave: Miconia; Invasive species; Hawaii; Farmers; Conjoint Choice Experiment; Valuation; Crop Production/Industries.

Ano: 2007

URL: http://purl.umn.edu/8189

Valuing the control of red imported fire ants in Australia using choice modelling

Rolfe, John; Windle, Jill.

Invasive species create particular challenges for policy makers .Some deliberately introduced species contribute significantly to agricultural production and other purposes. However, many invasive weed and animal pests generate substantial costs through impacts on agricultural production, biodiversity, ecosystem services, infrastructure and communities. An aggressive ant species, the red imported fire ant was introduced by accident to Australia. Infestations were found in Brisbane in February 2001. Modelling suggested that the pest could invade half of Australia within 35 years if it were not controlled.). Control of the fire ant has reduced the rate of new discoveries but the ant was still not eradicated by 2009. The benefits of controlling red...

Tipo: Report

Palavras-chave: Invasive species; Red imported fire ants; Choice modelling experiments; Non-market valuation.; Environmental Economics and Policy; Research Methods/ Statistical Methods.

Ano: 2009

URL: http://purl.umn.edu/94940

Economics of Cogongrass Control in Slash Pine Forests

Alavalapati, Janaki R.R.; Jose, Shibu; Stainback, G. Andrew; Matta, Jagannadha R.; Carter, Douglas R..

Cogonagrass (Imperata Cylindrica), an invasive weed, is a threat to slash pine forests. Using a dynamic optimization model, we estimated the impact of cogongrass on the profitability of slash pine forestry under four scenarios: no threat of cogongrass infestation; infestation is uncertain, and no control measures are taken; infestation is uncertain, but control measures are undertaken by one landowner but not the neighbors; and infestation is uncertain, and control measures are undertaken by everyone. Results indicate that annual net returns per acre under each scenario, respectively, are $25.30, $16.97, $13.89, and $17.38. Results suggest fostering a cooperative behavior among landowners is desirable.

Tipo: Journal Article

Palavras-chave: Cogongrass; Infestation; Invasive species; Productivity; Profitability; Q0; Q2.

Ano: 2008

URL: http://purl.umn.edu/37121

Forest Product Trade Impacts of an Invasive Species: Modeling Structure and Intervention Trade-Offs

Prestemon, Jeffrey P.; Zhu, Shushuai; Turner, James A.; Buongiorno, Joseph; Li, Ruhong.

Asian gypsy and nun moth introductions into the United States, possibly arriving on imported Siberian coniferous logs, threaten domestic forests and product markets and could have global market consequences. We simulate, using the Global Forest Products Model (a spatial equilibrium model of the world forest sector), the consequences under current policies of a wide-spread, successful pest invasion, and of plausible trading partner responses to the successful invasion. We find that trade liberalization would have a negligible effect on U.S. imports of Siberian logs and, consequently, on the risk of a pest invasion. But, if it happened, possibly through trade in other commodities, a successful and widespread pest invasion would have large effects on...

Tipo: Journal Article

Palavras-chave: Asian gypsy moth; Trade; Invasive species; Welfare; Spatial equilibrium model; Resource /Energy Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/10188

Stepping stones for biological invasion: A bioeconomic model of transferable risk

Warziniack, Travis; Finnoff, David C.; Bossenbroek, Jonathan; Shogren, Jason F.; Lodge, David.

Herein we model the widespread dispersal and management of an invasive species as a weak-link public good. The risk of introduction is driven in part by economic activity, is influenced by policies directed at the risk, and economic activity responds/adapts to the risk. Framed around recent introductions and rapid spread of dreissenid mussels in the Western United States, we find three key results. First, partial equilibrium estimates of welfare loss are significantly overestimated relative to general equilibrium estimates. If ecosystem services and market goods are substitutes the partial equilibrium bias is greater than if they are compliments. Second, well-intended policies do not necessarily reduce overall risk; risk reduction actions can transfer risk...

Tipo: Conference Paper or Presentation

Palavras-chave: Bioeconomic; Invasive species; Risk; Weak-link; Welfare; Environmental Economics and Policy; Risk and Uncertainty; Q2; Q26; Q57.

Ano: 2010

URL: http://purl.umn.edu/60957

Prioritizing Invasive Species Threats Under Uncertainty

Moffitt, L. Joe; Osteen, Craig D..

Prioritizing exotic or invasive pest threats in terms of agricultural, environmental, or human health damages is an important resource allocation issue for programs charged with preventing or responding to the entry of such organisms. Under extreme uncertainty, program managers may decide to research the severity of threats, develop prevention or control actions, and estimate cost-effectiveness in order to provide better information and more options when making decisions to choose strategies for specific pests. We examine decision rules based on the minimax and relative cost criteria in order to express a cautious approach for decisions regarding severe, irreversible consequences, discuss the strengths and weaknesses of these rules, examine the roles of...

Tipo: Journal Article

Palavras-chave: Invasive species; Decision criteria; Uncertainty; Resource /Energy Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/10168

Optimal investment in prevention and control of a potential invader: the case of zebra mussels in Florida waterways

Adams, Damian C.; Lee, Donna J.; Rossi, Frederick J..

The probability of a severe infestation ranges from 2% to 98% depending on investment in monitoring, prevention, and response technology. Given the estimated potential for economic damages, preliminary results indicate that prudent investment in prevention and early response net a present value net return of $10 million over 20 years.

Tipo: Conference Paper or Presentation

Palavras-chave: Invasive species; Bio-pollutant; Control cost; Cost transfer; Surface water; Risk; Environmental Economics and Policy.

Ano: 2007

URL: http://purl.umn.edu/34933

Economic Impact and Trade Implications of the Introduction of Black Sigatoka (Mycosphaerella figiensis) into Puerto Rico

Alamo, Carmen I.; Evans, Edward A.; Brugueras, Alba; Nalampang, Sikavas.

This article addresses the issues of the potential impacts of the introduction of black sigatoka into Puerto Rico under situations in which the government assists growers in managing the spread of the disease, with and without prohibitions on imports of plantains and bananas. An equilibrium displacement model is used to quantify the impact of black sigatoka. The results indicate that under both scenarios the net economic benefits to society were negative. Over the long term, the government would be well-advised to invest in research to develop plantain and banana varieties that are resistant to black sigatoka.

Tipo: Journal Article

Palavras-chave: Banana; Black sigatoka (Mycosphaerella fijiensis); Economic impact analysis; Equilibrium displacement model; Invasive species; Plantain; Q17; Q18.

Ano: 2007

URL: http://purl.umn.edu/43218

Asymmetric intraguild predation of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) on a native Coccinellidae guild

Castro-Guedes,Camila Fediuk de; Almeida,Lúcia Massutti de; Moura,Mauricio Osvaldo.

Abstract Harmonia axyridis is an exotic species that can cause serious impacts on native biodiversity in areas where it is introduced to act as a biological control agent. This predator is often involved with intraguild predation, in most cases with aphids predators. Here, we report the results of experiments designed to understand the outcome of the invasion of H. axyridis on native coccinellid aphidophagous guilds using intraguild predation as a theoretical framework. Tests were conducted to determine the interactions between 1st and 4th instars larvae and H. axyridis adults, with Cycloneda sanguinea, Cycloneda pulchella, Eriopis connexa and Hippodamia convergens larvae, as well as eggs predation rate. Two treatments were used: absence and presence of...

Occurrence and damages of Danothrips trifasciatus (Thysanoptera, Thripidae) on Calophyllum brasiliense (Clusiaceae) in Brazil

Palavras-chave: Aphids; Biological control; Cinara atlantica; Invasive species; Non-target organisms; Predator.

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262020000100202

Thomazini,Marcílio José; Lima,Élison Fabrício Bezerra.

Occurrence and damages of Danothrips trifasciatus (Thysanoptera: Thripidae) on Calophyllum brasiliense (Clusiaceae) in Brazil. Danothrips trifasciatus Sakimura, 1975 (Thysanoptera, Thripidae) is recorded for the first time in Brazil, in the municipality of Garça, São Paulo state. Individuals were collected in April 2011 damaging young leaves of guanandi, Calophyllum brasiliense Cambess. (Clusiaceae), forest species of increasing importance in Brazil. Future studies involving aspects on biology and population dynamics of the thrips in this plant species need to be carried out, in order to establish its potential economic importance to guanandi.

Harmonia axyridis: a threat to Brazilian Coccinellidae?

Palavras-chave: Description; Insect pest; Invasive species; Native forest species.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300013

Martins,Camila B. C.; Almeida,Lúcia M.; Zonta-de-Carvalho,Regina C.; Castro,Camila F.; Pereira,Rosylaine A..

Harmonia axyridis (Pallas) (Coleoptera, Coccinellidae) is a polyphagous Asian species, well-known as a classical biological control agent of aphids around the world, introduced probably accidentally in Brazil, sampled for the first time in 2002. It is an important intraguild predator, competing for food with native coccinellids. It was studied H. axyridis alimentary sources and host plants, its abundance compared with native and established species, the influence of abiotic factors and the seasons over the abundance of H. axyridis throughout one year, and discussed the mechanisms which influence the displacement of species. Harmonia axyridis was found in 38 plant species, among them 20 were new records, feeding on 20 aphid species, eight of them new...

A morphological reappraisal of the immature stages and life history of Elachista synethes Meyrick (Lepidoptera, Elachistidae), an Australian leaf miner alien to Chile

Palavras-chave: Aphididae; Intraguild predation; Invasive species; Native species.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000400018

Vargas,Héctor Andrés; Brito,Rosângela; Basilio,Daniel Silva; Moreira,Gilson Rudinei Pires.

ABSTRACT Elachista synethes was recently recognized as an alien species in northern Chile, where its larvae mine the rescue grass Bromus catharticus (Poaceae). In order to provide the necessary information to allow field detection of E. synethes during early ontogeny, we conducted a morphological reappraisal of the immature stages of this leaf-miner moth, based on light and scanning electron microscopy, including the first descriptions of the egg and the first-instar larva. This is the first report of the existence of an apodal early larva for a species of Elachista Treitschke. The legs and prolegs are absent in the first two instars, but are well developed in the last two. Additional observations on the life history are also provided, including a...

New geographical records and key to the species of Eumerus Meigen, 1823 (Diptera, Syrphidae) introduced into the Americas and Hawaii

Palavras-chave: Bromus catharticus; Elachistinae; Invasive species; Neotropical region.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000400265

Garcete-Barrett,Bolívar R.; Morales,Mírian N.; Hauser,Martin; Smit,John T.; González,Luis; López,María Bernarda Ramírez De; Arias,Osmar; Adorno,Marcial; Sormanti,Gerald; Mereles,Adriana.

Abstract Eumerus Meigen, 1823 is a very speciose genus of flower flies from the Eastern Hemisphere. Several reports of introduced species of this genus in the Americas have been recorded since early in the twentieth century, with a present list of six species recorded to date from the Americas and the US territory of Hawaii. In this paper we give new geographical records for the African-native species Eumerus obliquus (Fabricius, 1805), which reflect the expansion of this fly through Brazil and Paraguay along the last twenty years. At the same time, we report a second species from Paraguay, Eumerus aurifrons (Wiedemann, 1824), being this the first Western Hemisphere record for this Asian-native species. We finally provide an identification key to all of...

Identification key for drosophilid species (Diptera, Drosophilidae) exotic to the Neotropical Region and occurring in Brazil

Palavras-chave: Hover flies; Identification key; Invasive species; Pest insects.

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262020000100211

Yuzuki,Keven; Tidon,Rosana.

Abstract Thirteen species of drosophilid exotic to the Neotropical Region are recorded in Brazil, and some of them are highly invasive and threaten significantly fruit cultures. We provide an illustrated key for identifying these species, and briefly discuss their taxonomic status, distribution, and occurrence in the Neotropics. The key should not only support newcomers to the study of Drosophila but also facilitate their identification by those interested in insects associated with cultivated areas.