A5029031978- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Insect Pest Control Strategies
- Phytoplasmas and Hemiptera pathogens
- Insect Resistance and Genetics
- Plant Virus Research Studies
- Plant and animal studies
- Cocoa and Sweet Potato Agronomy
- Insect symbiosis and bacterial influences
- Plant Pathogenic Bacteria Studies
- Entomopathogenic Microorganisms in Pest Control
- Agricultural Practices and Plant Genetics
- Plant Parasitism and Resistance
- Plant Pathogens and Resistance
- Agronomic Practices and Intercropping Systems
- Nematode management and characterization studies
- Plant Disease Resistance and Genetics
- Insect and Arachnid Ecology and Behavior
- Weed Control and Herbicide Applications
- Plant Pathogens and Fungal Diseases
- Insect behavior and control techniques
- Agricultural pest management studies
- Banana Cultivation and Research
- Forest Insect Ecology and Management
- Insect Utilization and Effects
University of Wisconsin–Madison
2016-2025
Ecological Society of America
2019
United States Department of Agriculture
2007-2018
Agricultural Research Service
2006-2018
Cornell University
2002-2018
U.S. Vegetable Laboratory
2018
San Joaquin Valley Agricultural Sciences Center
2005-2015
University of California, Davis
2007-2015
University of California, Riverside
2009
North Carolina State University
1998-2003
Significance Decades of research have fostered the now-prevalent assumption that noncrop habitat facilitates better pest suppression by providing shelter and food resources to predators parasitoids crop pests. Based on our analysis largest pest-control database its kind, surrounding farm fields does affect multiple dimensions control, but actual responses pests enemies are highly variable across geographies cropping systems. Because often not enhance biological more information about local...
Since 1995, neonicotinoid insecticides have been a critical component of arthropod management in potato, Solanum tuberosum L. Recent detections neonicotinoids groundwater generated questions about the sources these contaminants and relative contribution from commodities U.S. agriculture. Delivery to crops typically occurs as seed or in-furrow treatment manage early season insect herbivores. Applied this way, become systemically mobile plant provide control key pest species. An outcome...
Abstract Insecticidal double-stranded RNAs (dsRNAs) silence expression of vital genes by activating the RNA interference (RNAi) mechanism in insect cells. Despite high commercial interest insecticidal dsRNA, information on resistance to dsRNA is scarce, particularly for products with non-transgenic delivery (ex. foliar/topical application) nearing regulatory review. We report development CEAS 300 population Colorado potato beetle ( Leptinotarsa decemlineata Say) (Coleoptera: Chrysomelidae)...
Wild plant species were systematically sampled to characterize reproduction of thrips, the vector Tomato spotted wilt virus (TSWV), and natural sources TSWV infection. Thrips populations monitored on 28 common perennial, biennial, annual over two noncrop seasons at six field locations across North Carolina. Sonchus asper, Stellaria media, Taraxacum officianale consistently supported largest immature species. The tobacco Frankliniella fusca, was most abundant collected, comprising 95% in each...
Long-term data sets are rare in agriculture, and the impact of plant diseases on food production is challenging to measure, which makes it difficult assess policy changes or research-based disease control efforts. Despite this challenge, clear that one largest impacts biological research security over past century has been vegetatively propagated fruit vegetable crops such as potato. The yield quality these higher countries have effective propagation certification systems. Of systems, seed...
The Colorado potato beetle, Leptinotarsa decemlineata (Say), is a major agricultural pest in the Central Sands region of Wisconsin. Imidacloprid, neonicotinoid insecticide, has commonly been used for control L. since its registration 1995. In last 10 years, many field populations have begun to show increasing imidacloprid resistance. We studied resistance phenotype as phenomenon that reduces efficacy and practical consequences management. Although we not observed complete failure following...
The ability of insect pests to rapidly and repeatedly adapt insecticides has long challenged entomologists evolutionary biologists. Since Crow's seminal paper on insecticide resistance in 1957, new data insights continue emerge that are relevant the old questions about how evolves: such as whether it is predominantly mono- or polygenic, evolving from standing vs. de novo genetic variation. Many studies support monogenic hypothesis, current management recommendations assume single- two-locus...
Neonicotinoids are a popular and widely-used class of insecticides whose heavy usage rates purported negative impacts on bees other beneficial insects has led to questions about their mobility accumulation in the environment. Neonicotinoid compounds currently registered for over 140 different crop uses United States, with commercial growers continuing rely heavily neonicotinoid control key insect pests through combination in-ground foliar applications. In 2008, Wisconsin Department...
Overwintering success is an important determinant of arthropod populations that must be considered as climate change continues to influence the spatiotemporal population dynamics agricultural pests. Using a long-term monitoring database and biologically relevant overwintering zones, we modeled annual seasonal common pest, Helicoverpa zea (Boddie), based on three suitability zones throughout North America using four decades soil temperatures: southern range (able persist through winter),...
Almond leaf scorch disease (ALSD) has recently reemerged in the San Joaquin Valley of California threatening almond production. ALSD is caused by Xylella fastidiosa, a nutritionally fastidious bacterium. Single nucleotide polymorphisms (SNPs) 16S rRNA gene (16S rDNA) X. fastidiosa strains were identified to characterize bacterial population infected trees. Genotype-specific SNPs used design primers for multiplex polymerase chain reaction assays early passage cultures. Two genotypically...
Pectobacterium species cause disease worldwide in many crop and ornamental plants, including potato. A new subspecies, P. carotovorum subsp. brasiliensis was recently described Brazil later found the United States, Israel, South Africa. Its virulence traits host range remain unknown. comparison of three taxa commonly on potato showed that both are more aggressive causing tuber stem soft rot than atrosepticum. Also, despite bacterial growth inhibition vitro atrosepticum strains by...
Cucumber mosaic virus (CMV) has a worldwide distribution and the widest host range of any known plant virus. From 2000 to 2012, epidemics CMV severely affected production snap bean (Phaseulos vulgaris L.) in Midwest Northeastern United States. Virus diversity leading emergence new strains is often considered significant factor epidemics. In addition epidemics, disease phenotypes arising from genetic exchanges or mutation can compromise effectiveness management strategies. Here, we captured...
The Colorado potato beetle, Leptinotarsa decemlineata (Say), is a major agricultural pest of potatoes in the Central Sands production region Wisconsin. Previous studies have shown that populations L. become resistant to many classes insecticides, including neonicotinoid insecticide, imidacloprid. Furthermore, has multiple mechanisms resistance deal with pesticide insult, enhanced metabolic detoxification by cytochrome p450s and glutathione S-transferases. With recent advances transcriptomic...
Spectral phenotyping is an efficient method for the nondestructive characterization of plant biochemical and physiological status. We examined ability a full range (350 to 2,500 nm) foliar spectral data (i) detect Potato virus Y (PVY) effects disease in visually asymptomatic leaves, (ii) classify different strains PVY, (iii) identify specific potato cultivars. Across cultivars, profiles PVY-infected leaves were statistically (F = 96.1, P ≤ 0.001) from noninfected leaves. Partial...
Overwintering of tobacco thrips, Frankliniella fusca, was investigated on common winter annual host plants infected with Tomato spotted wilt virus (TSWV). Populations thrips produced TSWV-infected did not differ from those healthy plants, whereas populations varied greatly among plant species. The mean per F. fusca averaged 401, 162, and 10 Stellaria media, Scleranthus annuus, Sonchus asper, respectively, during peak abundance in May. Adult collected hosts were predominately brachypterous...
Effects of temperature and precipitation on the temporal patterns dispersing tobacco thrips, Frankliniella fusca, onion Thrips tabaci, caught yellow sticky traps were estimated in central eastern North Carolina Virginia from 1997 through 2001. The impact that these environmental factors had numbers F. fusca T. tabaci during April May was determined using stepwise regression analysis 43 38 site-years aerial trapping data 21 18 different field locations, respectively. independent variables...