A5058494014- Insect Resistance and Genetics
- Insect-Plant Interactions and Control
- Entomopathogenic Microorganisms in Pest Control
- Agricultural pest management studies
- Soybean genetics and cultivation
- Insect Pest Control Strategies
- Forest Insect Ecology and Management
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Hemiptera Insect Studies
- Genetically Modified Organisms Research
- Plant Virus Research Studies
- Nematode management and characterization studies
- Plant and animal studies
- Plant Parasitism and Resistance
- Legume Nitrogen Fixing Symbiosis
- Insect behavior and control techniques
- Insects and Parasite Interactions
- Weed Control and Herbicide Applications
- CRISPR and Genetic Engineering
- Coleoptera Taxonomy and Distribution
- Agronomic Practices and Intercropping Systems
- Agriculture and Biological Studies
- Crop Yield and Soil Fertility
- Animal and Plant Science Education
Iowa State University
2009-2025
Ames National Laboratory
2012-2025
Syngenta (United States)
2018-2023
Triangle
2021
University of Florida
2019
University of California, Berkeley
2019
Pioneer Hi-Bred
2010-2016
Rockefeller University
2015
The University of Adelaide
2001
Monsanto (United States)
1999
Laboratory studies determined the effects of feeding corn, Zea mays L., pollen expressing a Cry1Ab protein derived from Bacillus thuringiensis (Berliner) subsp. kurstaki on 3 predatory species: Coleomegilla maculata DeGeer (Coleoptera: Coccinellidae), Orius insidiosus Say (Heteroptera: Anthocoridae), and Chrysoperla carnea Stephens (Neuroptera: Chrysopidae). No acute detrimental transgenic B. (Cry1Ab protein) preimaginal development survival were observed among these predators. The following...
Seed companies have commercialized new transgenic maize ( Zea mays L.) hybrids that are resistant to European corn borer [ Ostrinia nubilalis (Hübner)]. Drought stress may affect the expression of Bt proteins in tissues, and its resistance (ECB). This study was conducted at Iowa State University Hinds Irrigation Farm, Ames, IA, characterize effect drought on maize. Growth development measurements were taken 1997 1998 from non‐Bt plants subjected various soil water deficit treatments during...
The potential benefits of transgenic rootworm corn (Cry3Bb1 protein) are expected to include: increased root protection; intangible farmers (safety not being exposed insecticides, ease use and handling, time labor savings, better pest control); economic ($231 million from yield gains [$25-$75/acre relative no insecticide control, $4-$12/acre control with a soil insecticide] $58 in reduced risks savings); incidence stalk rot; protection (9 28% use, 1.5 4.5% insecticide). If is planted on 10...
Ground beetles (Coleoptera: Carabidae) are important in agro-ecosystems as generalist predators of invertebrate pests and weed seeds prey for larger animals. However, it is not well understood how cropping systems affect ground beetles. Over a 2-yr period, carabids were monitored two times per month using pitfall traps conventional chemical input, 2-yr, corn/soybean rotation system low 4-yr, corn/soybean/triticale-alfalfa/alfalfa system. Carabid assemblages largely dominated by few species...
Aggregation-sex pheromones, that attract both sexes, are produced by male cerambycid beetles (Coleoptera: Cerambycidae) of the subfamilies Cerambycinae, Lamiinae, and Spondylidinae. Here, we present results a field experiment conducted at multiple sites in southern Texas, primarily near border with state Tamaulipas, Mexico. At each site, deployed traps baited 6-component blend known pheromones cerambycine lamiine species + an ethanol lure, 5-component lure alone, solvent control. Over ~3-wk...
Field com, genetically engineered to produce a protein derived from Bacillus thuringiensis kurstaki strain HD-1, was evaluated for its effects on larva of the noctuid species Agrotis ipsilon (Hufnagel), Papaipema nebris (Geunée), Pseudaletia unipuncta (Haworth), and Helicoverpa zea (Boddie). No B. corn were observed larval survival, pupal weight, or days adult emergence A. P. nebris; however, reared leaf extract 0.068 g lighter in weights, delayed 8 d preimaginal development (from 33 41 d),...
Large-scale Þeld studies were conducted to determine if temporal plantings of Bacillus thuringiensis (Berliner) (Bt) corn (event 176 and Bt11) would affect the seasonal abundance following generalist predators: Coleomegilla maculata DeGeer Cycloneda munda (Say) (Coleoptera: Coccinellidae),Orius insidiosus (Heteroptera: Anthocoridae),Chrysoperla carnea Stephens (Neuroptera: Chrysopidae), one specialist parasitoid, Macrocentrus cingulum Brischke (Hymenoptera: Braconidae). Adult populations...
The effectiveness of endemic predators and parasitoids as biological control agents the greenbug, Schizaphis graminum (Rondani), was experimentally evaluated during 1985 1986 in Kansas winter wheat, Triticum aestivum, grain sorghum, Sorghum bicolor. Mechanical exclusion used experimental method evaluation. coccinellids Coleomegilla maculata lengi Timberlake, Hippodamia convergens Guèrin, Scymnus spp. were predominant greenbugs sorghum comprised 89% predator population. Lysiphlebus...
Two fermenting bait types of sweet red wine and a mixture beer/molasses/water, two trap types, were assessed as to how they influenced the abundance diversity longhorned beetles caught in woodlands Iowa, Missouri, Florida Keys, USA. Traps sizes, 3.8 L (Iowa bucket) or 2 (Missouri size, predominantly used beetles. Baits evaluated for five years four short duration study Florida. Clear plastic bottles, 3 L, also during one-year studies. The baited traps captured 3,969 60 species Cerambycidae...
A conceptual model is developed to evaluate the effect of Bt corn on risk. Results highlight importance distinguishing between marginal and aggregate risk effects demonstrate that depends crucially price paid for technology. Empirical results show that, depending price, can be marginally increasing or decreasing either increase decrease acreage. Also, provide a benefit farmers, even when increasing.
A 3-yr, multi-state survey of farmers who had planted transgenic Bacillus thuringiensis (Bt) corn was conducted to evaluate perceptions Bt performance and its utility as a management option for European borer, Ostrinia nubilalis (Hübner). questionnaire sent in Illinois, Iowa, Kansas, Minnesota, Nebraska, Pennsylvania grown during the growing seasons 1996, 1997, or 1998. There were 7,427 usable questionnaires returned with following response percentages: 1996 (42.1%), 1997 (35.0%), 1998...
In Iowa, the management of insect pests in soybean, Glycine max (L.) Merr., has been complicated by arrival invasive species soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), and occasional outbreaks bean leaf beetle, Cerotoma trifurcata (Förster) (Coleoptera: Chrysomelidae), populations leading to economic losses. Several insecticide programs designed reduce abundance overwintered first generation C. incidence pod mottle virus were evaluated over 3 yr (2004-2006) for their...
Journal Article Intraguild Competition and Enhanced Survival of Western Bean Cutworm (Lepidoptera: Noctuidae) on Transgenic Cry1Ab (MON810) Bacillus thuringiensis Corn Get access David L. Dorhout, Dorhout 1 2 Department Entomology, Iowa State University, Ames, IA 50011 1Corresponding author: e-mail: david.dorhout@pioneer.com Search for other works by this author on: Oxford Academic PubMed Google Scholar Marlin E. Rice 2Current address: Pioneer Hi-Bred Int'l, 7250 NW 62nd Ave., Johnston,...
Blended refuge for transgenic plants expressing Bacillus thuringiensis (Bt) toxins has been approved in the northern United States as a resistance management strategy alternative to structured refuge. A three-year study (2012–2014) was conducted with 54 trials across nine states southern evaluate plant injury from lepidopteran pests of corn and yield hybrid Cry1F × Cry1Ab Vip3Aa20 (Pioneer Brand Optimum Leptra) planted pure stand blends 5, 10, 20% both early late plantings. Injury by...
Abstract Male cerambycid beetles of the large subfamilies Cerambycinae and Lamiinae produce aggregation-sex pheromones that attract both sexes. The many species are conserved among closely related (e.g., congeners) more distantly different subfamilies), including those endemic to continents. This parsimony in pheromone structures suggests multiple may be attracted traps baited with blends pheromones, such finding use delineating geographic ranges native surveillance programs for incursions...
Fall armyworm, Spodoptera frugiperda, is a major target pest of the Vip3A protein. The fitness Bacillus thuringiensis (Bt)-resistant insects on refuges an important factor in determining speed resistance development. Fitness costs associated with Bt can vary among host plants. Here, we provide first experimental evaluation interactions between non-Bt hosts and S. frugiperda.Laboratory bioassays showed that survivorship, pupal weight, sex ratio, developmental time, fecundity, net reproductive...
Fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae); corn earworm, Helicoverpa zea Boddie southwestern borer, Diatraea grandiosella Dyar Crambidae); sugarcane saccharalis F. and lesser cornstalk Elasmopalpus lignosellus Zeller Pyralidae), are lepidopteran pests of corn, Zea mays L., in the southern United States. Blended refuge for transgenic plants expressing insecticidal protein derivative from Bacillus thuringiensis (Bt) has recently been approved as an alternative...
Abstract Springtails are an integral and beneficial part of the soil community. As extensive study effect rootworm Bt corn (Cry3Bb1) on nontarget invertebrates, we evaluated both abundance diversity surface-active (epedaphic) subsurface (euedaphic) springtails at Ames, IA, Monmouth, IL, in 2-yr field trials during 2000–2002. were collected from pitfall traps cores plots planted with its non-Bt isoline. Few differences observed individual species isoline corn. Nor did estimated richness or...
Journal Article The Vertical Beat Sheet: A New Device for Sampling Soybean Insects Get access Bastiaan M. Drees, Drees Texas Agricultural Extension Service, A&M University System, College Station, 77843 Search other works by this author on: Oxford Academic PubMed Google Scholar Marlin E. Rice of Economic Entomology, Volume 78, Issue 6, 1 December 1985, Pages 1507–1510, https://doi.org/10.1093/jee/78.6.1507 Published: 01 1985 history Received: 06 February Accepted: 19 August
Cerotoma trifurcata Förster (Coleoptera: Chrysomelidae) and Bean pod mottle virus (Comoviridae) (BPMV) both can reduce yield seed quality of soybean, Glycine max (L.) Merr. Field experiments were conducted to evaluate the effects systemic, seed-applied, foliar-applied insecticides for management this pest complex at three locations in central, northeastern, northwestern Iowa during 2002-2004. Seed-applied insecticide was evaluated according a currently recommended program (i.e., applications...
The western bean cutworm, Striacosta albicosta (Smith), is a pest of corn and dry beans in North America. Before the late 1990s, economic infestations insect were restricted mostly to Great Plains Idaho. During 1999–2009, it greatly expanded its range moved across central eastern regions Corn Belt, eventually reaching northeastern Atlantic coast states. Greenpeace Germany issued 2010 report claiming that dramatic expansion cutworm was due entirely "pest replacement" resulted from adoption...
Abstract Corn is one of the major commodities in United States, and grown for fuel, feed, food around world. Much production centered Midwest, but corn throughout country has a national value $91.7 billion. Because substantial economic impact production, as well profitability individual farming operations, crop protection from pests critical. most vulnerable during ear kernel formation, pest infestations this time can have on grain quality yield. Detecting important components integrated...