A5052562775- Insect Pest Control Strategies
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Insect-Plant Interactions and Control
- Insect Resistance and Genetics
- Insect Utilization and Effects
- Entomopathogenic Microorganisms in Pest Control
- Agricultural pest management studies
- Fossil Insects in Amber
- Study of Mite Species
- Plant and animal studies
- Pesticide Exposure and Toxicity
- Insect behavior and control techniques
- Forest Insect Ecology and Management
- Plant Virus Research Studies
- Food Waste Reduction and Sustainability
- Agricultural Innovations and Practices
- Agricultural Engineering and Mechanization
- Insect symbiosis and bacterial influences
- Date Palm Research Studies
- Weed Control and Herbicide Applications
- Greenhouse Technology and Climate Control
- Mycotoxins in Agriculture and Food
- Agricultural safety and regulations
- Insects and Parasite Interactions
Oklahoma State University
2015-2025
North Carolina State University
2023
Iowa State University
2023
Kansas State University
2001-2023
Oklahoma State University Oklahoma City
2018-2023
Dakota State University
2023
University of California, Davis
2023
Plant (United States)
2021
Center for Grain and Animal Health Research
2006-2012
United States Department of Agriculture
2010
Phosphine gas, or hydrogen phosphide (PH3), is the most common insecticide applied to durable stored products worldwide and routinely used in United States for treatment of bulk-stored cereal grains other products. Research from late 1980s revealed low frequencies resistance various residual grain protectant insecticides phosphine insect species collected Oklahoma. The present work, which same previously established discriminating dose bioassays toxicity as earlier study, evaluated adults...
Stored product beetles that are resistant to the fumigant pesticide phosphine (hydrogen phosphide) gas have been reported for more than 40 years in many places worldwide. Traditionally, determination of resistance stored is based on a discriminating dose bioassay can take up two weeks evaluate. We developed diagnostic cleaved amplified polymorphic sequence method, CAPS, detect individuals with alleles strong populations red flour beetle, Tribolium castaneum, and lesser grain borer,...
Psocids are difficult to manage using grain protectants and phosphine hence research on non-chemical control methods. This study evaluated the effectiveness of Xylocoris flavipes (Reuter) (Hemiptera: Anthocoridae) at managing Liposcelis decolor (Pearman) (Psocodea: Liposcelididae). The functional responses adult♀ nymphs X. a diet nymphs, adult♂, L. were determined under laboratory conditions 28 ± 1 °C, 63 5% RH, 0:24 (L:D) photoperiod. Maximum likelihood estimates (MLEs) logistic regression...
Field experiments were conducted in steel bins containing 13,600 kg of hard red winter wheat, Triiticum aestivum L. One bin was treated with ozone and the second served as a control. Stored grain insects placed for 1-, 2-, 3-, 4-d exposure periods sampling tubes to test concentrations 0, 25, 50, 70 parts per million by volume (ppmv). Ozone treatments on eggs larvae Plodia interpunctella (Hübner) not effective, but pupae more susceptible. Sitophilus oryzae (L.) adults most susceptible species...
Abstract BACKGROUND: The psocids Liposcelis bostrychophila Badonnel and L. entomophila (Enderlein) (Liposcelididae) are emerging pests of stored products. Although their behavior, particularly high mobility, may contribute to the reported relatively low efficacy insecticides against them, studies investigate this have not been conducted. present study aimed assess label rate three commercial (β‐cyfluthrin, chlorfenapyr pyrethrins) applied on concrete surfaces , also sublethal effect mobility...
Phosphine is a valuable fumigant to control pest populations in stored grains and grain products. However, recent studies indicate substantial increase phosphine resistance product pests worldwide. To understand the molecular bases of insects, we used RNA-Seq compare gene expression phosphine-resistant susceptible laboratory red flour beetle, Tribolium castaneum. Each population was evaluated as either phosphine-exposed or no (untreated controls) triplicate biological replicates (12 samples...
Reliable quantitative data on maize post-harvest losses and factors that cause them in northern Ghana are limited. In this study we assessed at six markets the Northern Region of Ghana, around Tamale, during harvest storage period October 2015–June 2016. Across all sampling periods grain temperature was 32.6 ± 0.2 °C equilibrium moisture content (EMC) 9.5 0.2%. EMC tended to decrease a low January February then increased again, while mean above 30 months. The primary stored product insects...
A field experiment was conducted in eight 13.6-MT steel bins containing 6.8 MT each of wheat to assess efficacy sulfuryl fluoride or SF fumigant control phosphine-resistant and susceptible Rhyzopertha dominica (F.) Tribolium castaneum (Herbst). Approximately 400 adults type beetle were added bin. Additionally, muslin bags immature stages adults, with their respective diets, also placed bins. Four fumigated others untreated The dosages treated ranged from 1,196–1,467 mg-h/liter. Mortality bag...
Phosphine gas (PH3) is one of the most commonly used fumigants for controlling stored-grain pests worldwide. We estimated discriminating dose Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae) adult insects using a laboratory susceptible strain. This was then to determine presence or absence PH3 resistance (resistance frequencies) in 19 field-collected populations C. from Oklahoma, United States. The as 56.2 ppm over 20-h exposure period at 25 °C. Discriminating bioassay...
Abstract The sugarcane aphid Melanaphis sacchari (Zehnter) (Hemiptera: Aphididae) has emerged as a potential threat to sorghum (Sorghum bicolor (L.) Moench) production in the United States. Since late summer of 2013, finding and advancing M. sacchari-resistant germplasm been priority for all stakeholders involved. We evaluated 23 genotypes resistance by testing tolerance, antixenosis. In addition, nine were expression antibiosis. Free-choice no-choice tests conducted explore functional...
Insect predators can suppress prey populations through increased progeny production. The present study investigated the numerical responses of adult♀ Xylocoris flavipes (Reuter) (Hemiptera: Anthocoridae) on a diet Liposcelis decolor (Pearman) (Psocodea: Liposcelididae). Adult♀ X. were placed in arenas containing nymphs, adult females, or males L. at varying densities under laboratory conditions 28 ± 1 °C, 63 5 RH, and 0:24 (L:D) photoperiod. number eggs laid by predator was assessed 24 h...
Phosphine resistance in stored-product insects occurs worldwide and is a major challenge to continued effective use of this fumigant. We determined frequencies levels Tribolium castaneum Plodia interpunctella collected from California almond storage processing facilities. Discriminating doses phosphine were established for eggs larvae P. T. using laboratory susceptible strains the two species. For eggs, discriminating 62.4 107.8 ppm, respectively, over 3-d fumigation period, larvae, dose was...
We investigated the suitability of 11 diets as culture media for psocids Lepinotus reticulatus Enderlein (Psocoptera: Trogiidae) and Liposcelis entomophila (Enderlein) Liposcelididae). The comprised six made plain cereals, namely, wheat (Triticum aestivum L.), corn (Zea mays milo Sorghum bicolor (L.), barley (Hordeum vulgare oats (Avena sativa rice (Oryza five artificial diets. found that, with exception corn, L. population increase was greater on cereal than diets, greatest growth oats....
We investigated the effects of temperature and relative humidity on population growth development psocid Lepinotus reticulatus Enderlein. Part this study assessed marking psocids by using methylene blue, chalk powder, fluorescent powder to differentiate nymphal stages during development. found that blue increased mortality took twice as long accomplish compared with powder. Using shortened duration third fourth instars. Marking had no effect or Therefore, we recommend for psocids. L. did not...
Differences in stored-product psocid progeny production as a function of commodity type, percentage cracked kernels, and wheat class were examined using laboratory bioassays. Population growth Liposcelis bostrychophila Badonnel, decolor (Pearman), paeta Pearman, entomophila (Enderlein) (Psocoptera: Liposcelididae) was highest on sorghum Sorghum bicolor (L.) Moench, followed by wheat, Triticum aestivum L., rice, Oryza sativa whereas negligible germ. In second experiment that did not include...
Journal Article Weight Loss and Germination Failure Caused by Psocids in Different Wheat Varieties Get access S. G. Gautam, Gautam 1Department of Entomology Plant Pathology, Oklahoma State University, 127 Noble Research Center, Stillwater, OK 74078. Search for other works this author on: Oxford Academic PubMed Google Scholar P. Opit, Opit 2Corresponding author, e-mail: george.opit@okstate.edu. K. L. Giles, Giles B. Adam 3Department Agricultural Economics, 413 Ag Hall, Economic Entomology,...
The efficacies of commercial methoprene and esfenvalerate aerosols for control stored-product psocid pests were evaluated in simulated field studies. methoprene, EC, the carrier Isopar-M™, a combination Liposcelis decolor (Pearman) (Psocoptera: Liposcelididae) entomophila (Enderlein) nymphs assessed, effects direct indirect exposure bostrychophila Badonnel, L. decolor, paeta Pearman adults to EC aerosol evaluated. greatest nymphal mortality attained was 76%, indicating that four tested...