Browsing by Author "Pfeiffer, Douglas G."
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- 2016 Southeast Regional Bunch Grape Integrated Management GuideNita, Mizuho; Burrack, Hannah J.; Pfeiffer, Douglas G.; Mitchem, Wayne; Lockwood, David; Bellinger, Robert (2016-04-04)While not technically a numbered VCE publication, this is produced by a group of extension specialists in the southeastern region. CALS is a member of the Southeastern Small Fruit Consortium, the producer of this guide.
- 2016 Southeast Regional Caneberry Integrated Management Guide. Southeastern Small Fruit ConsortiumBrannen, Philip; Schnabel, Guido; Burrack, Hannah J.; Bessin, Richard; Pfeiffer, Douglas G.; Mitchem, Wayne; Jennings, Katie; Lockwood, David; Fernandez, Gina; Sial, Ash (2016-04-04)While not technically a numbered VCE publication, this is produced by a group of extension specialists in the southeastern region. CALS is a member of the Southeastern Small Fruit Consortium, the producer of this guide
- 2016 Spray Bulletin for Commercial Tree Fruit GrowersPfeiffer, Douglas G.; Bergh, J. Christopher; Frank, Daniel L.; Hooks, C. R. R.; Walsh, C. S.; Yoder, Keith S.; Rahan, Mahfaz; Kotcon, J. B.; Derr, Jeffrey F.; Chandran, Rakesh S.; Weaver, Michael W.; Brown, Amy; Parkhurst, James A. (2016-01-01)This is a multi-state guide, with orchard recommendations for Virginia, West Virginia and Maryland.
- 2017 Spray Bulletin for Commercial Tree Fruit Growers. Va. Coop. Ext. Serv. Publ. 456-419Pfeiffer, Douglas G.; Bergh, J. Christopher; Wilson, James M.; Frank, Daniel L.; Hooks, C. R. R.; Sherif, Sherif M.; Walsh, C. S.; Yoder, Keith S.; Rahman, M.; Kotcon, J. B.; Derr, Jeffrey F.; Chandran, Rakesh S.; Weaver, Michael J.; Brown, Amy; Parkhurst, James A. (2016)Integrated pest management (IPM) is the approach emphasized in this guide; some aspects of IPM are incorporated throughout, although this guide mainly deals with the chemical component of IPM. IPM combines biological control from predators with selective chemical application for maintaining pest populations below economic threshold levels. This approach requires that growers give careful consideration to the selection, application rate and timing of chemical sprays. The degree of integration achieved will vary according to the management ability, training and objectives of the orchardist. Inadequate monitoring or implementation of IPM practices will lead to unsatisfactory results. In order to encourage the biological control components of the program, growers must consider the toxicity of chemicals to predators (Table 9, page 59) in addition to their efficacy against fruit pests (Tables 7 and 8, pages 56-58).
- 2020 Southeast Blueberry Integrated Management Guide.Burrack, Hannah J.; Cline, Bill; Melanson, Rebecca; Singh, Raj; Hale, Frank; Sial, Ash; Pfeiffer, Douglas G.; Czarnota, Mark; Jennings, Katie; Lockwood, David (2020-01)2020 Southeast Regional Blueberry Integrated Management Guide
- 2020 Southeast Regional Bunch Grape Integrated Management Guide. Southern Region Small Fruit Consortium Bull. 46Nita, Mizuho; Brannen, Phil; Villani, S.; Hansen, Z.; Burrack, Hannah J.; Pfeiffer, Douglas G.; Blaauw, Brett R.; MItchem, W.; Lockwood, D.; Menjak, M. T. (2020-04)
- 2020 Southeast Regional Caneberries Integrated Management GuideOliver, Jonathan; Schnabel, G.; Melanson, R.; Gauthier, N.; Burrack, Hannah J.; Sial, Ash; Hale, F.; Pfeiffer, Douglas G.; Mitchem, W.; Jennings, K.; Lockwood, D.; Mengak, M. T.; Fernandez, G.; Stafne, E. (2020-01)
- 2020 Southeast Regional Strawberry Integrated Pest Management Guide for Plasticulture ProductionMelanson, R. A.; Johnson, C.; Schnabel, G.; Ferguson, M. H.; Desaeger, J.; Schmidt-Jeffris, R.; Burrack, Hannah J.; Pfeiffer, Douglas G.; Hale, F.; Jennings, K.; Brannen, P. (2020-01)
- 2020 Spray Bulletin for Commercial Tree Fruit Growers: Virginia, West Virginia, and University of MarylandPfeiffer, Douglas G.; Bergh, J. Christopher; Wilson, James; Hooks, C. R. R.; Sherif, Sherif M.; Walsh, C. S.; Yoder, Keith S.; Rahman, Mahfaz; Kotcon, J. B.; Derr, Jeffrey F.; Chandran, Rakesh S.; Frank, Daniel L.; Wycoff, Stephanie B.; Brown, Amy; Parkhurst, James A. (2020)Integrated pest management (IPM) is the approach emphasized in this guide; some aspects of IPM are incorporated throughout, although this guide mainly deals with the chemical component of IPM. IPM combines biological control from predators with selective chemical application for maintaining pest populations below economic threshold levels. This approach requires that growers give careful consideration to the selection, application rate and timing of chemical sprays. The degree of integration achieved will vary according to the management ability, training and objectives of the orchardist. Inadequate monitoring or implementation of IPM practices will lead to unsatisfactory results. In order to encourage the biological control components of the program, growers must consider the toxicity of chemicals to predators (Table 9, page 59) in addition to their efficacy against fruit pests (Tables 7 and 8, pages 56-58)...
- 2021 Home Grounds and Animals PMG - Author Contact ListAskew, Shawn D.; Wycoff, Stephanie B.; Bergh, J. Christopher; Bush, Elizabeth A.; Day, Eric R.; Del-Pozo, Alejandro; Derr, Jeffrey F.; Frank, Daniel L.; Hansen, Mary Ann; Hong, Chuan X.; Laub, Curtis A.; McCall, David S.; Miller, Dini M.; Nita, Mizuho; Parkhurst, James A.; Paulson, Sally L.; Pfeiffer, Douglas G.; Rideout, Steven L.; Wilson, James; Yoder, Keith S. (Virginia Cooperative Extension, 2021-02-12)This is a chapter of the 2021 Home Grounds and Animals PMG. This 2021 Virginia Pest Management Guide provides the latest recommendations for controlling diseases, insects, and weeds for home grounds and animals. This publication contains information about prevention and nonchemical control as alternatives to chemical control or as part of an integrated pest management approach. The chemical controls in this guide are based on the latest pesticide label information at the time of writing. Because pesticide labels change, read the label directions carefully before buying and using any pesticide. Regardless of the information provided here, always follow the latest product label instructions when using any pesticide. Commercial products are named in this publication for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products that also may be suitable.
- 2021 Home Grounds and Animals PMG - Home FruitPfeiffer, Douglas G.; Bergh, J. Christopher; Nita, Mizuho; Yoder, Keith S. (Virginia Cooperative Extension, 2021-02-12)This is a chapter of the 2021 Home Grounds and Animals PMG. This 2021 Virginia Pest Management Guide provides the latest recommendations for controlling diseases, insects, and weeds for home grounds and animals. This publication contains information about prevention and nonchemical control as alternatives to chemical control or as part of an integrated pest management approach. The chemical controls in this guide are based on the latest pesticide label information at the time of writing. Because pesticide labels change, read the label directions carefully before buying and using any pesticide. Regardless of the information provided here, always follow the latest product label instructions when using any pesticide. Commercial products are named in this publication for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products that also may be suitable.
- 2021 Home Grounds PMG - IndexAskew, Shawn D.; Wycoff, Stephanie B.; Bush, Elizabeth A.; Day, Eric R.; Del-Pozo, Alejandro; Derr, Jeffrey F.; Frank, Daniel L.; Hansen, Mary Ann; Laub, Curtis A.; McCall, David S.; Miller, Dini M.; Nita, Mizuho; Parkhurst, James A.; Paulson, Sally L.; Pfeiffer, Douglas G.; Rideout, Steven L.; Wilson, James; Yoder, Keith S.; Hong, Chuan X. (Virginia Cooperative Extension, 2021-02-12)This is a chapter of the 2021 Home Grounds and Animals PMG. This 2021 Virginia Pest Management Guide provides the latest recommendations for controlling diseases, insects, and weeds for home grounds and animals. This publication contains information about prevention and nonchemical control as alternatives to chemical control or as part of an integrated pest management approach. The chemical controls in this guide are based on the latest pesticide label information at the time of writing. Because pesticide labels change, read the label directions carefully before buying and using any pesticide. Regardless of the information provided here, always follow the latest product label instructions when using any pesticide. Commercial products are named in this publication for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products that also may be suitable.
- 2021 Horticultural and Forest PMG - AuthorsAskew, Shawn D.; Baudoin, Antonius B.; Bergh, J. Christopher; Chamberlin, Lori; Dary, Eric R.; Del-Pozo, Alejandro; Derr, Jeffrey F.; Frank, Daniel; Hansen, Mary Ann; Hong, Chuan X.; Johnson, Charles S.; Laub, Curtis A.; McCall, David S.; Nita, Mizuho; Parson, Rachel; Peer, Kyle; Pfeiffer, Douglas G.; Richardson, Robert J.; Salom, Scott M.; Schultz, Peter B.; Wilson, James (Virginia Cooperative Extension, 2021-02-12)Horticultural and Forest Crops 2021 Author Contact List
- 2021 Horticultural and Forest PMG - Commercial Small Fruit: Diseases and InsectsPfeiffer, Douglas G.; Johnson, Charles S.; Bergh, J. Christopher; Derr, Jeffrey F. (Virginia Cooperative Extension, 2021-02-12)This is a chapter from the 2021 Horticulture and Forest Pest Management Guide. The Virginia Pest Management Guide (PMG) series lists options for management of major pests: diseases, insects, nematodes, and weeds. These guides are produced by Virginia Cooperative Extension and each guide is revised annually. PMG recommendations are based on research conducted by the Research and Extension Division of Virginia Tech, in cooperation with other land-grant universities, the USDA, and the pest management industry.
- 2021 Horticultural and Forest PMG - GrapesPfeiffer, Douglas G.; Baudoin, Antonius B.; Bergh, J. Christopher; Nita, Mizuho (Virginia Cooperative Extension, 2021-02-12)This is a chapter from the 2021 Horticulture and Forest Pest Management Guide. The Virginia Pest Management Guide (PMG) series lists options for management of major pests: diseases, insects, nematodes, and weeds. These guides are produced by Virginia Cooperative Extension and each guide is revised annually. PMG recommendations are based on research conducted by the Research and Extension Division of Virginia Tech, in cooperation with other land-grant universities, the USDA, and the pest management industry.
- 2021 Horticultural and Forest PMG - HopsNita, Mizuho; Pfeiffer, Douglas G.; Derr, Jeffrey F. (Virginia Cooperative Extension, 2021-02-12)This is a chapter from the 2021 Horticulture and Forest Pest Management Guide. The Virginia Pest Management Guide (PMG) series lists options for management of major pests: diseases, insects, nematodes, and weeds. These guides are produced by Virginia Cooperative Extension and each guide is revised annually. PMG recommendations are based on research conducted by the Research and Extension Division of Virginia Tech, in cooperation with other land-grant universities, the USDA, and the pest management industry.
- 2022 Spray Bulletin for Commercial Tree Fruit Growers: Virginia, West Virginia, and University of Maryland ExtensionPfeiffer, Douglas G.; Bergh, J. Christopher; Wilson, James M.; Quesada, C.; Hooks, C. R. R.; Sherif, Sherif; Aćimović, Srđan G.; Rahman, Mahfuz; Kotcon, J. B.; Derr, J. F.; Chandran, R. S.; Frank, Daniel L.; Parkhurst, J. (Virginia Cooperative Extension, 2022-03-07)
- Alerta de Plagas: Mosca Linterna con Manchas Lycorma deliculataDay, Eric R.; Pfeiffer, Douglas G.; Dellinger, Theresa A.; Bergh, J. Christopher; Sastre, Beth (Virginia Cooperative Extension, 2018-05-30)Discusses the Spotted Lanternfly, an insect pest recently discovered in Virginia. Also describes its life cycle, hosts, and crop damage.
- Apple orchards feed and contaminate bees during, but even more so after bloomSteele, Taylor N. (Virginia Tech, 2021-11-16)Honey bees, Apis mellifera Linn., provide vital economic and ecological services via pollination while concurrently facing multiple interconnected stressors impacting their health. Many crops like apples, peaches, and cherries that add diversity and nutrition to our diet are wholly or partially dependent upon the pollination services of insects. Orchard crops are self-incompatible and commonly regarded as crops reliant on the pollination services of insects, and while previous studies have focused on the impact of bees to orchard crops during bloom, fewer studies have examined the reciprocal relationship of the orchards on honey bees, particularly across the entire foraging season. Here we investigated the foraging dynamics of honey bees in an orchard crop environment in Northern Virginia, United States. We decoded, mapped, and analyzed 3,710 waggle dances, which communicate the location of a valuable resource in the environment, for two full foraging seasons (April-October, 2018-2019), and, concurrent to the dance filming, collected pollen from returning foragers. We found that bees forage locally the majority of the time (< 2 km) throughout the season, with some long-range distances occurring in May after bloom (both 2018 and 2019) and in fall (2019). The shortest communicated median distances (0.50 km and 0.53 km), indicating abundant food availability, occurred during September in both years, paralleling the bloom of an important late season resource, goldenrod (Solidago). We determined, through plotting and analyzing the communicated forage locations and from the collected pollen from returning foragers, that honey bees forage more within apple orchards after the bloom (29.4% and 28.5% foraging) compared to during bloom (18.6% and 21.4% foraging) on the understory of clover and plantain. This post bloom foraging also exposes honey bees to the highest concentration of pesticides across the entire foraging season (2322.89 ppb pesticides versus 181.8 during bloom, 569.84 in late summer, and 246.24 in fall). Therefore, post bloom apple orchards supply an abundance of forage, but also the highest risk of pesticide exposure, which may have important implications for management decisions of bees in orchards.
- Assessing Farm-Level and Aggregate Economic Impacts of Olive Integrated Pest Management Programs in Albania: an Ex-Ante AnalysisDaku, Lefter S. (Virginia Tech, 2002-04-11)Concerns about the harmful effects of pesticides on the environment, human health, and wildlife have led to research and promotion of integrated pest management (IPM) strategies. Recently, an IPM program was introduced in the Albanian olive sector through the USAID-funded global IPM-CRSP project to develop improved olive IPM technologies. This study develops and applies a protocol for integrated economic impact assessment of olive pest management strategies designed by the IPM-CRSP project in Albania. The main components of the integrated approach for economic impact assessment of olive IPM include (i) net return analysis for measuring farm level impacts; (ii) economic surplus modeling for measuring market-level impacts; and (iii) modeling of IPM adoption under output uncertainty. The economic surplus equilibrium displacement model developed for the Albanian olive market with no international trade accounts for IPM research-induced supply shifts, increased demand due to quality improvement, and research-induced spillovers to non-target zones. The main sources of data for performing partial budgeting and economic surplus analysis were: (i) an expert survey; (ii) partial budgets compiled based on a farmer survey and expenditure records from field-level experiments; and (iii) data collected at the market level. The data used to estimate the dichotomous logit model came from a 1999 survey of 200 growers and a survey of 120 growers carried out in 2000 in the Vlora district of Albania. The net return analysis indicates that compared to conventional practices, the proposed olive IPM packages generally promise higher yields, improved quality of olive products, lower pesticide use, and higher net returns to producers. However, adoption of some of the IPM practices implied higher production costs. Based on the simulation results, the Albanian olive industry has the potential to derive a net IPM research benefit between $39 million (assuming that farmers move directly from minimum spraying to IPM) and $52 million (assuming that farmers move from full pesticide program to IPM) over the next 30 years. Farmers' reliance on pesticide use on olives and other crops does not seem to hinder IPM adoption. Grower perceptions and the process of expectation formation significantly influence adoption decisions. Addressing the process of expectation formation and changing these perceptions by educational programs and better access to information will encourage IPM adoption.