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Flight movement and spatial distribution of immunomarked thrips in onion, potato, and tomato PAB
Fernandes,Flávio Lemes; Fernandes,Maria Elisa de Sena.
The objective of this work was to evaluate the spatial distribution of thrips in different crops, and the correlation between meterological parameters and the flight movements of this pest, using immunomarking. The experiment was conducted in cultivated areas, with tomato (Solanum lycopersicum), potato (Solanum tuberosum), and onion (Allium cepa); and non-cultivated areas, with weedy plants. The areas with tomato (100 days), potato (20 days), and weeds were sprayed with casein, albumin, and soy milk, respectively, to mark adult thrips; however, the areas with onion (50 days) and tomato (10 days) were not sprayed. Thrips were captured with georeferenced blue sticky traps, transferred into tubes, and identified by treatment area with the Elisa test. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alliaceae; Dispersal pattern; Elisa; Integrated pest management; Solanaceae; Thysanoptera.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000500399
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New species of Rhinoleucophenga, a potential predator of pineapple mealybugs PAB
Culik,Mark Paul; Ventura,José Aires.
The objective of this work was to describe a new species of Rhinoleucophenga (Diptera: Drosophilidae). Rhinoleucophenga capixabensis sp. nov. is described based on specimens collected from pineapple (Ananas comosus var. comosus) infested with Dysmicoccus brevipes (Hemiptera: Pseudococcidae) in the state of Espírito Santo, Brazil. Distinguishing characters of R. capixabensis sp. nov. include hyaline wings, a strong seta on the second antennal segment, body length of about 2-3 mm, uniformly dark brown scutellum, one pair of strong prescutellar setae, ventral epandrial lobes with about 17-18 teeth, and female cerci with approximately 20 long setae.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diptera; Drosophilidae; Biological control; Integrated pest management; Natural enemy; Predator.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000400013
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Epidemiology and strategies for chemical management of powdery mildew in mango PAB
Pérez-Rodríguez,Amado; Monteón-Ojeda,Abraham; Mora-Aguilera,José Antonio; Hernández-Castro,Elías.
Abstract: The objective of this work was to evaluate phytosanitary strategies for the chemical control of powdery mildew (Oidium mangiferae) in mango, based on the alternation of active ingredients with different modes and sites of action, and to determine the environmental and epidemiological conditions that favor the development of the disease. The experiment was conducted in Guerrero, México, in commercial orchards, within a program for the development of fungicide spraying strategies. Epidemic curves were used on temporal analyses of the disease for: incidence; area under disease progression curve (AUDPC); severity; and conidial seasonality and its relationships with meteorological parameters. The disease was better controlled with the application of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mangifera indica; Oidium mangiferae; Epidemics; Fungicide resistance; Integrated pest management; Multisite fungicides..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900715
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A low-cost trap for Cerambycidae monitoring in forest plantations in Brazil PAB
Fernandes,Flávio Lemes; Picanço,Marcelo Coutinho; Chediak,Mateus; Fernandes,Maria Elisa Sena; Ramos,Rodrigo Soares; Moreira,Suzana de Sá.
The objective of this work was to evaluate the use of a low-cost trap to capture Cerambycidae in different seasons in planted forests in Brazil. Thirty polyethylene-terephthalate trap bottles per hectare were used, disposed at every 50 m. The traps were red painted and contained glass flasks with a mixture of ethanol, methanol and benzaldehyde. There were soap and water at the trap bottom. The traps were checked biweekly for beetle presence. Sampling time required one minute per sample, and traps were easy to use. Total sampling cost, including materials and labor, was US$ 13.46 per sample. Six Cerambycidae species were captured along the dry and rainy seasons.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Integrated pest management; Pest monitoring; Sampling cost; Wood borer.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000900015
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Bioactivity of the organic extracts of Annona vepretorum on Tetranychus urticae (Acari: Tetranychidae) PAB
Fernandes,Maria Herlândia de Araújo; Menezes,Karen Oliveira de; Souza,Adriana Maria de; Almeida,Jackson Roberto Guedes da Silva; Oliveira,José Eudes de Morais; Gervásio,Rita de Cássia Rodrigues Gonçalves.
Abstract: The objective of this work was to evaluate the lethal and sublethal toxicity of hexane and methanolic extracts from the leaves of Annona vepretorum (Annonaceae) on Tetranychus urticae (Acari: Tetranychidae). The methanolic extract toxicity was evaluated by Potter tower application (topical + residual effect) and by immersion of Canavalia ensiformis leaf disks in the extract solution (residual contact effect). The hexane extract toxicity was evaluated exclusively through residual contact effect. Sublethal effects of the methanolic extract were evaluated through LC50 on the females. Mite preference for feeding and oviposition was evaluated by multiple choice tests, between the control and the extract concentrations, using the hexane and methanolic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetogenins; Botanical acaricide; Botanical extracts; Integrated pest management; Pesticide resistance; Two-spotted spider mite.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900707
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HAIRY FLEABANE AS A SOURCE OF MAJOR INSECT PESTS OF SOYBEAN Planta Daninha
DALAZEN,G.; CURIOLETTI,L.E.; CAGLIARI,D.; STACKE,R.F.; GUEDES,J.V.C..
ABSTRACT Weeds compete with crops for essential inputs, but they are also important hosts for pests, both during the crop and between crops. Hairy fleabane (Conyza bonariensis) is an important weed growing in both summer and winter crops. The aim of this study was to evaluate the occurrence and population fluctuations of soybean pests using hairy fleabane as an alternative host. Samples of hairy fleabane plants were collected fortnightly over twelve months at two sites (Boa Vista do Incra and São Vicente do Sul) in Rio Grande do Sul state, Brazil. The results showed that hairy fleabane plants provided shelter to important soybean pests, including the pentatomid stink bugs Edessa meditabunda, Piezodorus guildinii, Dichelop sp. and Euschistus heros,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybean pests; Integrated pest management; Weeds; Conyza bonariensis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300403
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THE ADOPTION OF IPM TECHNIQUES BY VEGETABLE GROWERS IN FLORIDA, MICHIGAN AND TEXAS AgEcon
Fernandez-Cornejo, Jorge; Beach, E. Douglas; Huang, Wen-Yuan.
Factors influencing the adoption of Integrated Pest Management (IPM) techniques are studied using survey data from individual vegetable producers from Florida, Michigan, and Texas. Farmers who adopt IPM tend to be less risk averse and use more managerial time on farm activities than nonadopters. Adopters are also more likely to operate large, irrigated farms and use more family labor. Locational factors and the type of crop grown are also influential in IPM adoption. The analysis uses a logit framework and introduces adopter categories first conceptualized by rural sociologists.
Tipo: Journal Article Palavras-chave: Diffusion of innovations; Integrated pest management; Vegetables; Technology adoption; Crop Production/Industries.
Ano: 1994 URL: http://purl.umn.edu/15441
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The Value of Bt Corn in Southwest Kansas: A Monte Carlo Simulation Approach AgEcon
Hyde, Jeffrey; Martin, Marshall A.; Preckel, Paul V.; Buschman, Lawrent L.; Edwards, C. Richard; Sloderbeck, Phillip E.; Higgins, Randall A..
While most Corn Belt farmers consider planting Bt corn to control European corn borer, southwestern Kansas farmers must also take into account an array of other insect pests, including corn rootworm, spider mites, and southwestern corn borer. This research uses a decision analysis framework to estimate the expected economic value of Bt corn in southwest Kansas. Mean per acre Bt values ranged from $12.49 to $34.60, well above the technology fee assumed to be $14 per unit, or $5.25 per acre at a seeding rate of 30,000 seeds per acre. The minimum value over all scenarios was $8.69 per acre. Using Monte Carlo simulation, it was shown that European and southwestern corn borer infestation probabilities, expected corn price, and expected pest-free yields are...
Tipo: Journal Article Palavras-chave: Bt corn; Decision analysis; European corn borer; Integrated pest management; Monte Carlo simulation; Southwestern corn borer; Crop Production/Industries.
Ano: 2003 URL: http://purl.umn.edu/30721
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MANAGING PEST RESISTANCE: THE POTENTIAL OF CROP ROTATIONS AND SHREDDING AgEcon
Babcock, Bruce A.; Secchi, Silvia.
The current debate over resistance management plans mandated by the Environmental Protection Agency for transgenic crops ignores management practices that are complementary to refuge schemes. A dynamic production model is developed that measures the costs and benefits of crop rotation and shredding in terms of delaying resistance to Bt corn.
Tipo: Conference Paper or Presentation Palavras-chave: Biotechnology; Common property resource; Crop rotation; European Corn Borer; Externalities; Insecticide resistance; Integrated pest management; Intertemporal optimization; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1999 URL: http://purl.umn.edu/21597
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ECONOMIC ANALYSIS OF ENVIRONMENTAL BENEFITS OF INTEGRATED PEST MANAGEMENT AgEcon
Mullen, Jeffrey D.; Norton, George W.; Reaves, Dixie Watts.
Public support for integrated pest management (IPM) is derived in part from concerns over food safety and the environment, yet few studies have assessed the economic value of health and environmental benefits of IPM. An approach is suggested for such an assessment and applied to the Virginia peanut IPM program. Effects of IPM on environmental risks posed by pesticides are assessed and society's willingness to pay to reduce those risks is estimated. The annual environmental benefits of the peanut IPM program are estimated at $844,000. The estimates of pesticide risks and willingness to pay can be applied elsewhere in economic assessments of IPM.
Tipo: Journal Article Palavras-chave: Integrated pest management; Willingness to pay; Environmental benefits; Crop Production/Industries; Environmental Economics and Policy.
Ano: 1997 URL: http://purl.umn.edu/15057
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Socio-Economic Impact of a Cocoa Integrated Crop and Pest Management Diffusion Knowledge Through a Farmer Field School Approach in Southern Cameroon AgEcon
Dieu ne Dort, Njankoua Wandji; Julius, Lapbim Nkeh; Gockowski, James; Isaac, Tchouamo.
We focused on the Socio-Economic Evaluation of Farmer Field School Training on Integrated Pest Management in the humid forest region of Cameroon. The main objective was to assess the impact of training on integrated pest management (IPM) on cocoa farmer field school graduates. The results indicate that shade management, phytosanitary harvest, pruning, improved spraying practices and grafting of improved materials were adopted at the rate of 94, 93, 90, 66 and 35 % respectively, with the overall rate of adoption being 76 %. There was a 47 % reduction in the frequency of spraying fungicides and a 17 % reduction in the number of sprayers applied per treatment following the implementation of the training. Labour inputs increased significantly for pruning,...
Tipo: Conference Paper or Presentation Palavras-chave: Integrated pest management; Farmer field school; Adoption rate; Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/25418
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Optimal Management of Molds in Stored Corn AgEcon
Yigezu, Yigezu A.; Alexander, Corinne E.; Preckel, Paul V..
Long term storage of corn is becoming more common due to the recent increase in the demand for corn by ethanol plants. Infection of maize kernels by toxigenic fungi remains a challenging storage problem despite decades of research. Experts in storage management propose the use of a combination of preventive and monitoring-based responsive strategies in response to mold risks. In this paper, a stochastic dynamic programming model is solved to determine the expected profitability and optimal combination, timing and intensity of the proposed mold management strategies using farmers’ existing infrastructure. The results show that even with relatively high monitoring costs, maintaining high quality grain using a monitoring based optimal mold management strategy...
Tipo: Conference Paper or Presentation Palavras-chave: Mold management; Stored corn; Expected profitability; Integrated pest management; Monitoring; Aeration; Stochastic dynamic programming; Crop Production/Industries; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/6572
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Green Technologies for a More Sustainable Agriculture AgEcon
Hrubovcak, James; Vasavada, Utpal; Aldy, Joseph E..
For U.S. agriculture to continue along a sustainable path of economic development, further production increases must be generated by technologies that are both profitable and more environmentally benign. In this context, we assess the role of these green or sustainable technologies in steering agriculture along a more sustainable path. However, the lack of markets for the environmental attributes associated with green technologies can limit their development. In addition, simply making a technology available does not mean it will be adopted. Experience with green technologies such as conservation tillage, integrated pest management, enhanced nutrient management, and precision agriculture demonstrates that even when technologies are profitable, barriers to...
Tipo: Report Palavras-chave: Sustainable agriculture; Natural capital; Nonrenewable resources; Renewable resources; Environmental services; Green technology; Integrated pest management; Conservation tillage; Enhanced nutrient management; Precision agriculture; Environmental Economics and Policy; Farm Management.
Ano: 1999 URL: http://purl.umn.edu/33721
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Spatial Externalities of Pest Control Decisions in the California Citrus Industry AgEcon
Grogan, Kelly A.; Goodhue, Rachael E..
Predaceous and parasitic insects provide control of important citrus pests. However, many pesticides are toxic to these beneficials. Using California citrus grower survey data, this article tests whether landscape-level use of pesticides affects the presence of and reliance on Aphytis melinus, an important beneficial insect. Results show that landscape-level pesticide use decreases the presence of A. melinus and increases reliance on insecticides. Pesticide use on non-citrus crops has a significant negative effect on the presence of Aphytis melinus, suggesting a cross-crop spatial externality. Our findings illustrate that regulations designed to address cross-crop effects on beneficial insects can increase social welfare.
Tipo: Article Palavras-chave: Aphytis melinus; Beneficial insects; California red scale; Citrus; Integrated pest management; Pesticide; Spatial externalities; Agricultural and Food Policy; Crop Production/Industries; Production Economics.
Ano: 2012 URL: http://purl.umn.edu/122310
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THE ENVIRONMENTAL EFFECTS OF ADOPTING IPM TECHNIQUES: THE CASE OF PEACH PRODUCERS AgEcon
Fernandez-Cornejo, Jorge; Ferraioli, Jennifer.
The impact of adopting integrated pest management (IPM) techniques is examined for peach producers in eight states accounting for most of the U.S. production. The method accounts for self-selectivity, simultaneity, and the pesticide demand equations are theoretically consistent with a restricted-profit function. Biological pest management techniques tend to reduce pesticide use and pesticide toxicity substantially, while pesticide-efficiency techniques (using scouting and economic thresholds) have an increasing effect on pesticide use and toxicity, and cultural techniques have an insignificant effect on pesticide use and toxicity.
Tipo: Journal Article Palavras-chave: Biological techniques; Cultural techniques; Integrated pest management; Peach production; Pesticide use; Self-selection; Toxicity; Environmental Economics and Policy.
Ano: 1999 URL: http://purl.umn.edu/15148
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Effectiveness of Integrated Pest Management Dissemination Techniques: A Case Study of Potato Farmers in Carchi, Ecuador AgEcon
Mauceri, Maria; Alwang, Jeffrey Roger; Norton, George W.; Barrera, Victor.
Potato farmers in Ecuador rely on chemical inputs to manage pests and optimize yields. Integrated pest management techniques lower production costs, reduce pesticide exposure, and improve long-term agricultural sustainability. Public extension does not, however, exist in Ecuador and cost-effective means of communicating complex messages to producers are needed. We analyze cost-effectiveness of alternative dissemination methods, including farmer field schools (FFS), field days, pamphlets, and word-of-mouth transmission. Field days and pamphlets have strong impacts on adoption, especially considering their low costs. FFS are effective, but expensive. Evidence also indicates significant diffusion from FFS to non-FFS farmers, indicating high...
Tipo: Journal Article Palavras-chave: Ecuador; Farmer field schools; Integrated pest management; Technology adoption; Technology dissemination; Q01; Q16.
Ano: 2007 URL: http://purl.umn.edu/37091
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POISSON COUNT MODELS TO EXPLAIN THE ADOPTION OF AGRICULTURAL AND NATURAL RESOURCE MANAGEMENT TECHNOLOGIES BY SMALL FARMERS IN CENTRAL AMERICAN COUNTRIES AgEcon
Ramirez, Octavio A.; Schultz, Steven D..
Evaluations of the factors influencing the adoption of agricultural and natural resource management technologies among small farmers in developing countries have been mostly limited to qualitative discussions or simple descriptive statistics resulting in superficial and inconclusive findings. This study introduces the use of Poisson Count Regressions as a statistically appropriate procedure to analyze certain common types of adoption data. It uses them to assess the impact of key socio-economic, bio-physical, and institutional factors on the adoption of integrated pest management, agroforestry, and soil conservation technologies among small farmers in three Central American countries: Costa Rica, Panama, and El Salvador.
Tipo: Journal Article Palavras-chave: Agroforestry; Evaluation of development projects; Integrated pest management; Poisson count regressions; Soil conservation; Technology adoption; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000 URL: http://purl.umn.edu/15400
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Does It Matter Who Scouts? AgEcon
Lichtenberg, Erik; Berlind, Ayesha Velderman.
Scouting is the most widely used integrated pest management technique adopted by U.S. growers. This study applies an implicit demand formulation of the Lichtenberg-Zilberman damage abatement model to data from a survey of Maryland field crop growers to examine differences in pesticide demand between growers using scouts trained and supervised by extension and those using chemical dealer employees or scouting themselves. The results give partial support to those skeptical of the quality of scouting by farmers themselves and by consultants working for chemical dealers. Soybean growers using extension-trained scouts had significantly lower pesticide demand than those using chemical dealer employees or scouting themselves. However, no significant differences...
Tipo: Journal Article Palavras-chave: Crop loss; Damage abatement; Extension; Integrated pest management; Pesticide demand; Pesticides; Scouting; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/31214
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Assessing Potential Impact of a Farmer Field School Training on Perennial Crop in Cameroon AgEcon
Wandji, Njankoua; Binam, Nyemeck; Sonii, David; Mva Mva, Jonas; Gockowski, James.
This study is an attempt of the combination of multiple data sources referring to the same time period and to the same farmer population, it aims at assessing the potential impact of a cocoa Farmer Field School Training on Integrated Pest Management in Cameroon. Using a combination of a latitudinal and a longitudinal comparison, the results indicate that FFS-trained farmers have significantly more knowledge about crop husbandry practices than those in the non-participant comparison group. A 32% production increase and 45% income increase relative to the non-participants was estimated in the latitudinal analysis. The longitudinal comparison is showing significant adoption rates of 94, 93, 90, 66 and 35 % respectively for shade management, phytosanitary...
Tipo: Conference Paper or Presentation Palavras-chave: Integrated pest management; Farmer field school; Adoption rate; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Land Economics/Use; Marketing; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008 URL: http://purl.umn.edu/52103
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Do Pesticide Hazards to Human Health and Beneficial Insects Cause or Result from IPM Adoption? Mixed Messages from Farmer Field Schools in Nicaragua AgEcon
Labarta, Ricardo A.; Swinton, Scott M..
This paper analyzes the interaction between farmer training in pest management and effects on acute pesticide poisoning and populations of beneficial insects in Nicaragua. Using farm level data from Nicaraguan bean growers, including graduates of Farmer Field Schools (FFS), other integrated pest management (IPM) outreach methods, and farmers without exposure to IPM, we found that small farmers are influenced by pesticide-related acute illness experiences when adopting IPM practices and making decisions about pesticide use. However, exposure to IPM extension programs failed to reduce the use of highly toxic pesticides and increased the number of self-reported acute illness symptoms during the most recent bean crop season. IPM training did result in...
Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem service; Integrated pest management; Agricultural extension; Nicaragua; Farm Management; Q16.
Ano: 2005 URL: http://purl.umn.edu/19305
Registros recuperados: 90
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