A5030296926- Insect and Pesticide Research
- Forensic Entomology and Diptera Studies
- Insect behavior and control techniques
- Insect Pest Control Strategies
- Animal Virus Infections Studies
- Viral gastroenteritis research and epidemiology
- Insect-Plant Interactions and Control
- Diptera species taxonomy and behavior
- Bird parasitology and diseases
- Insect Resistance and Genetics
- Dermatological diseases and infestations
- Animal Behavior and Welfare Studies
- Plant and animal studies
- Insect Utilization and Effects
- Vector-Borne Animal Diseases
- Helminth infection and control
- Insects and Parasite Interactions
- Forest Insect Ecology and Management
- Ruminant Nutrition and Digestive Physiology
- Mosquito-borne diseases and control
- Virus-based gene therapy research
- Viral Infections and Vectors
- Animal Disease Management and Epidemiology
- Effects of Environmental Stressors on Livestock
- Biological Control of Invasive Species
University of Minnesota
2013-2023
Institute of Entomology
1999-2018
Center for Medical, Agricultural and Veterinary Entomology
2009
University of Minnesota System
1999-2004
Judson University
2002
Agriculture and Agri-Food Canada
2001
Iowa State University
1985
Minnesota Department of Natural Resources
1983
University of California, Davis
1979-1981
Transgenic maize engineered to express insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) has become widely adopted in U.S. agriculture. In 2009, Bt was planted on more than 22.2 million hectares, constituting 63% of crop. Using statistical analysis per capita growth rate estimates, we found that areawide suppression primary pest Ostrinia nubilalis (European corn borer) is associated with use. Cumulative benefits over 14 years are an estimated $3.2 billion for growers...
Stable flies, Stomoxys calcitrans (L.), are among the most damaging arthropod pests of cattle worldwide. The last estimate their economic impact on United States production was published 20 yr ago and placed losses at $608 million. Subsequently, several studies effects stable flies beef weight gain feed efficiency have been published, become increasingly recognized as pasture range. We analyzed developed yield-loss functions to relate fly infestation levels productivity, then estimated in...
Journal Article Practical Sampling Plans for Varroa destructor (Acari: Varroidae) in Apis mellifera (Hymenoptera: Apidae) Colonies and Apiaries Get access K. V. Lee, Lee 1 Department of Entomology, University Minnesota, 219 Hodson Hall, 1980 Folwell Avenue, St. Paul, MN 55108 1Corresponding author, e-mail: leex1444@umn.edu Search other works by this author on: Oxford Academic PubMed Google Scholar R. D. Moon, Moon E. C. Burkness, Burkness W. Hutchison, Hutchison M. Spivak Economic Volume...
The objective of this study was to evaluate the effects 2 winter (December April) housing systems on dairy cow hygiene scores, frostbite, teat condition, clinical mastitis, and activity rumination across 3 seasons (2013, 2014, 2015). Certified-organic cows (n = 268) were randomly assigned treatments (2 replicates per system): (1) outdoor straw pack (outdoor) or (2) 3-sided compost-bedded barn (indoor). Cows calved during (spring fall) at University Minnesota West Central Research Outreach...
Three hundred houseflies were allowed to feed on donor pigs viraemic with porcine reproductive and respiratory syndrome virus (PRRSV) the fifth, sixth seventh days after had been inoculated virus. After 60 seconds, flies' feeding was interrupted, they transferred manually repletion a naive recipient pig housed in separate room. To enhance chance of flies obtaining pigs' blood, back each scarified sandpaper until slight haemorrhage visible. The PRRSV transmitted from pigs, RNA detected by...
The neotropical parasitoid Conura annulifera (Walker) (Hymenoptera: Chalcididae) is known to parasitize bird-parasitic flies in the genus Philornis (Diptera: Muscidae) including P. downsi (Dodge and Aitken), a species that has invaded Galápagos islands negatively impacting populations of Darwin's finches. We report here some aspects life history, field ecology, host specificity C. annulifera. collected puparia four 13 bird nests during 2015 2016 western mainland Ecuador found three other...
The invasive parasitic fly, Philornis downsi (Muscidae), is one of the greatest threats to avifauna Galapagos Islands. larvae this fly feed on blood and tissues developing nestlings at least 18 endemic native birds. aim current study was investigate biotic abiotic factors that may influence population dynamics parasite. To vegetation zone related climatic numbers, a bi-weekly monitoring program using papaya-baited traps carried out dry, lowland site humid, highland Santa Cruz Island between...
Seven mark-recapture studies were conducted over 3 yr to assess dispersal of newly emerging adult stable flies, Stomoxys calcitrans L., from larval development sites in a mixed agricultural environment northeastern Nebraska. Infested hay debris piles marked by dusting their surfaces with fluorescent pigments, adults captured surrounding grids Alsynite sticky traps, and specimens dissected determine feeding histories reproductive age. Distances directions 3,889 indicated males females...
A sand dilution assay was developed to study how composting affects the nutritional value of stored laying hen manure for larvae house fly, Musca domestica L. Equal numbers eggs were inoculated into graded amounts stock and incubated under standardized moisture conditions. Survival mass per emerging adult diminished with progressively lower supplies larva, whether diluted clean, white or placed on top an equal volume sand. Mass adults original egg increasing linear function log2 supply,...
Abstract A 2-year study compared milk production and profitability for confinement feeding versus rotational grazing. Guernsey x Holstein cows grazed perennial grass pastures from mid-May to October or were fed in confinement. Averaged over both years, confined produced 7% more milk; their was similar fat concentration that of grazing cows. Body weight changes health the two groups similar. Net return per cow averaged $64 higher than because lower costs feeding, facilities, equipment, labor....
The objectives of the study were to determine site porcine reproductive and respiratory syndrome virus (PRRSV) in individual houseflies, assess whether an housefly could transmit PRRSV a susceptible pig, compare ability PCR, isolation pig bioassay detect houseflies. In first experiment 26 houseflies fed on infected experimentally with PRRsv; 13 processed as whole fly homogenate, while exterior surface wash gut homogenate collected from other 13. Infectious was recovered nine homogenates, 12...
Laboratory and field studies assessed how face fly, Musca autumnalis DeGeer (Diptera: Muscidae), was affected by competition among fly larvae for cattle dung. Cohorts of 1st-instar flies were reared with known amounts dung per individual, then various life-history attributes the subsequent stages examined. The 1st symptom stunting pupae adults. Stunted females emerged earlier, matured later, possessed fewer ovarioles less fecund than their full-sized counterparts. Where intense, few survived...