A5079988886- Insect Resistance and Genetics
- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Hemiptera Insect Studies
- Entomopathogenic Microorganisms in Pest Control
- Genetically Modified Organisms Research
- Soybean genetics and cultivation
- Insect Pest Control Strategies
- Agricultural pest management studies
- Nematode management and characterization studies
- Viral Infectious Diseases and Gene Expression in Insects
- Plant Physiology and Cultivation Studies
- Weed Control and Herbicide Applications
- Plant Pathogens and Fungal Diseases
- Research in Cotton Cultivation
- Horticultural and Viticultural Research
- Legume Nitrogen Fixing Symbiosis
- Genetic and Environmental Crop Studies
- Plant Virus Research Studies
- Insect behavior and control techniques
- Isotope Analysis in Ecology
- CRISPR and Genetic Engineering
- Plant Surface Properties and Treatments
- Allelopathy and phytotoxic interactions
- Plant Disease Management Techniques
University of Tennessee at Knoxville
2020-2025
Louisiana State University
2015-2024
Louisiana State University Agricultural Center
2014-2023
Mississippi Delta Community College
2020-2023
Mississippi State University
2020-2023
Texas A&M University
2018-2023
Louisiana State University of Alexandria
2020-2021
University of Arkansas at Monticello
2020
University of Arkansas at Fayetteville
2020
Delta Air Lines (United States)
2020
Crops genetically engineered to make insect-killing proteins from Bacillus thuringiensis (Bt) have revolutionized management of some pests. However, the benefits such transgenic crops are reduced when pests evolve resistance Bt toxins. We evaluated toxins and cotton plants using laboratory bioassays complementary field trials focusing on Helicoverpa zea, one most economically important other in United States.The data 235 demonstrate Cry1Ac, Cry1Fa, Cry2Ab occurred 95 strains H. zea derived...
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),...
Abstract Transgenic crops producing Bacillus thuringiensis (Bt) proteins have become a primary tool in pest management. Due to the intensive use of Bt crops, resistance fall armyworm, Spodoptera frugiperda , Cry1F maize has occurred Puerto Rico, Brazil and some areas southeastern U.S. The sustainability faces great challenge because Cry1F-maize resistant S. may also infest other multiple cropping ecosystems. Here we examined survival plant injury population selected with on three single-gene...
The corn earworm, Helicoverpa zea (Boddie), is a major pest targeted by pyramided Bacillus thuringiensis (Bt) and cotton in the U.S. Cry1Ab one of first insecticidal toxins used Bt crops, while Vip3A relatively new toxin that has recently been incorporated into Cry with event MIR 162 varieties to generate traits targeting lepidopteran pests including H. zea. objectives this study were determine current status distribution resistance, evaluate susceptibility Vip3Aa20 expressed southeastern...
In the southern United States, thrips are a significant early season pest of cotton. in 2022, 98% cotton acres were infested with thrips, and, those acres, 45% treated for thrips. Thrips injury resulted over $113 million dollars losses plus control costs to industry States that year. A new Bacillus thuringiensis trait known as ThryvOn has been commercialized provide against There is ongoing debate about need an insecticidal seed treatment improve on varieties. Field studies conducted...
Soybean (Glycine max) is the most widely grown legume crop in world, providing important economic value. Pest herbivory damage by insects and mammalian wildlife, particular white-tailed deer (Odocoileus virginianus), limits yields soybean. Incorporating trypsin inhibitors (TIs) as plant protectant against pests has been of interest. We previously showed that overexpression soybean TIs conferred insect deterrence under greenhouse experiments. In this study, we examined potential transgenic...
The corn earworm/bollworm, Helicoverpa zea (Boddie), is a pest species that targeted by both Bacillus thuringiensis (Bt) maize and cotton in the United States. Cry1Ab Vip3Aa20 are two common Bt toxins expressed transgenic maize. objective of this study was to determine resistance allele frequency (RAF) H. populations were collected during 2018 2019 from four southeastern U.S. states: Louisiana, Mississippi, Georgia, South Carolina. By using group-mating approach, 104 F2 iso-lines established...
Cotton leafroll dwarf virus (CLRDV) has recently been discovered in the southern United States. The is transmitted by cotton aphid and causes numerous symptoms including foliar chlorosis, distortion, leaf cupping, reddened veins. These were observed a field northeast Louisiana during summer of 2019 approximately 2 weeks after infestation. Grafting infected plants with healthy ones resulted similar symptom development, molecular diagnosis initially indicated then confirmed presence CLRDV...
Abstract BACKGROUND Seed mixture, also called ‘RIB’, has been used to provide refuge populations for delaying insect resistance. Pollen contamination in RIB could result kernels of non‐Bt maize expressing variable Bt proteins. Data are lacking regarding the impact pollen on evolution resistance ear‐feeding insects. Here, we Spodoptera frugiperda and Cry1F‐maize as a model examine if increases dominance RESULTS caused >66% 5:95% (non‐Bt:Bt) 20:80% RIBs express Cry1F protein. Survival at...
Many applications of abamectin for control twospotted spider mite, Tetranychus urticae (Koch), in Midsouth cotton have been made over the last ten years. Field-control failures and shortened residual recently observed may be an indication resistance formation. The fast activity relatively low costs products repeat consecutive more frequent as incidence T. infestations increased cotton. Using a leaf-dip bioassay, studies were conducted to evaluate levels 12 populations collected from...
The sugarcane aphid (Melanaphis sacchari Zehntner) is a significant economic pest of grain sorghum (Sorghum bicolor (L.) Moench) in the Southern United States. Current nominal and research-based thresholds are based on estimates mean aphids per leaf. Because enumerating leaf potentially time consuming, binomial sequential sampling plans for M. were developed that allow users to quickly classify status field populations determine when an threshold has been exceeded. During 2016 2017, counts...
An insecticide efficacy trial of neonicotinoid seed treatments against sugarcane aphids in grain sorghum was conducted at the Macon Ridge Research Station (MRRS) Franklin Parish near Winnsboro, LA, 2014. Grain planted on 2 Jul and emerged 6 a Gigger fine silty loam soil with minimum tillage. The test an RCB design four replications. Individual plots were rows (centered 40 inches) …
The wide occurrence of resistance to Cry1A and Cry2A insecticidal toxins from Bacillus thuringiensis (Bt) in the corn earworm/bollworm Helicoverpa zea (Boddie) leaves Vip3A toxin produced during vegetative stage Bt as only fully active expressed transgenic crops control H. U.S.A. During 2021, first unexpected survival injury (UXI) on a maize hybrid expressing Cry1A.105, Cry2Ab2, Vip3Aa Louisiana, were observed two sentinel plots used for monitoring. A follow-up intensive investigation was...
Stink bugs (Hemiptera: Pentatomidae) are important insect pests of crops. bug feeding reduces yields, lowers crop quality, induces delayed maturity, and wounds tissues allowing for pathogen entry. Historically, effective adult nymph control stink has been with insecticides. However, little insecticide efficacy against eggs is known. The objective this study was to determine how foliar insecticides currently recommend southern green bug, Nezara viridula (L.), in soybean impact pre-emergence...
In the U.S., Helicoverpa zea (Boddie) is a major pest targeted by both transgenic maize and cotton expressing Bacillus thuringiensis (Bt) proteins. Resistance of insect to Bt containing cry1A cry2A genes has widely occurred in U.S. this study, two trials were performed investigate larval survival development Cry1A.105/Cry2Ab2 dual-protein resistant (VT2P-RR), susceptible, an F1 heterozygous (VT2P-RS) populations H. on ears nine three non-Bt hybrids. The hybrids evaluated represent five...