PubAg
Main content area
Limit your search
Search
86 Search Results
« Previous |
1 - 20 of 86
|
Next »
Search Results
- Author:
- Daniel Cook, et al. ; Boyd Tarlinton; James M. McGree; Alethea Blackler; Caroline Hauxwell; Show all 5 Authors
- Source:
- Journal of economic entomology 2022 v.115 no.3 pp. 715-723
- ISSN:
- 0022-0493
- Subject:
- Apis mellifera; entomology; geometry; honey bee colonies; honey bees; pollination; temperature; Australia
- Abstract:
- ... Strength auditing of European honey bee (Apis mellifera Linnaeus, 1758 [Hymenoptera: Apidae]) colonies is critical for apiarists to manage colony health and meet pollination contracts conditions. Colony strength assessments used during pollination servicing in Australia typically use a frame-top cluster-count (Number of Frames) inspection. Sensing technology has potential to improve auditing proce ...
- DOI:
- 10.1093/jee/toac034
- https://doi.org/10.1093/jee/toac034
- Author:
- Daniel Cook, et al. ; Benedict T. Green; Clinton A. Stonecipher; Kevin D. Welch; Stephen T. Lee; Show all 5 Authors
- Source:
- Toxicon 2022 v.205 pp. 79-83
- ISSN:
- 0041-0101
- Subject:
- Cicuta; diazepam; goats; intravenous injection; phenobarbital; toxicity
- Abstract:
- ... Water hemlocks (Cicuta spp.) are toxic members of the Apiaceae plant family. The best drug treatment for the convulsions associated with acute water hemlock poisoning in livestock and humans has not been determined experimentally. This work compared the therapeutic actions of benzodiazepines (diazepam) and barbiturates (phenobarbital) on water hemlock poisoning in a goat model. C. maculata tubers ...
- Handle:
- 10113/7590210
- DOI:
- 10.1016/j.toxicon.2021.12.003
- CHORUS:
- 10.1016/j.toxicon.2021.12.003
- https://doi.org/10.1016/j.toxicon.2021.12.003
- Author:
- Daniel Cook, et al. ; Gabriela Zabaleta; Stephen T. Lee; Marcelo Aguilar; Leopoldo J. Iannone; Carlos Robles; Agustin Martinez; Show all 7 Authors
- Source:
- Toxicon 2022 v.217 pp. 107-111
- ISSN:
- 0041-0101
- Subject:
- Festuca argentina; Poa; alkaloids; livestock; Argentina
- Abstract:
- ... One of the main intoxications to livestock in the Patagonia region of Argentina is the tremorgenic disease “Mal de Huecú", attributed to the consumption of the native grasses Poa huecu and/or Festuca argentina. In this report, five outbreaks of spontaneous intoxications were investigated. Several indole-diterpene alkaloids were identified in Poa huecu and Festuca argentina including the known trem ...
- DOI:
- 10.1016/j.toxicon.2022.08.001
- https://doi.org/10.1016/j.toxicon.2022.08.001
- Author:
- Daniel Cook, et al. ; Alethea Blackler; James McGree; Caroline Hauxwell; Show all 4 Authors
- Source:
- Journal of economic entomology 2021 v.114 no.2 pp. 538-546
- ISSN:
- 0022-0493
- Subject:
- Apis mellifera; beehives; combs (social insects); commercialization; energy expenditure; entomology; environmental management; homeostasis; honey; honey bee colonies; humans; nectar; pollination; temperature; thermal energy
- Abstract:
- ... Hive design and apicultural processes have not been fundamentally changed since the design and commercialization of the Langstroth moveable frame hive in 1854. Colonies of Apis mellifera Linnaeus (Hymentoptera: Apidae) (the honey bee) maintain a brood nest temperature within the narrow range of 34.5–35.5°C, critical for brood development. Apis mellifera invest considerable energy to maintain hive ...
- DOI:
- 10.1093/jee/toab023
- https://doi.org/10.1093/jee/toab023
- Author:
- Daniel Cook, et al. ; Marwa Neyaz; Dale R. Gardner; Rebecca Creamer; Show all 4 Authors
- Source:
- Microorganisms 2022 v.10 no.3 pp. -
- ISSN:
- 2076-2607
- Subject:
- Chaetothyriales; Fabaceae; Ipomoea carnea; Pleosporales; apical meristems; endosymbionts; epibionts; hypocotyls; leaves; microscopy; mycelium; plant growth; sclereids; swainsonine; trichomes
- Abstract:
- ... Several species of fungi from the orders Chaetothyriales and Pleosporales have been reported to produce swainsonine and be associated as symbionts with plants of the Convolvulaceae and Fabaceae, respectively. An endosymbiont belonging to the Chaetothyriales produces swainsonine and grows as an epibiont on the adaxial leaf surfaces of Ipomoea carnea, but how the symbiont passes through plant growth ...
- Handle:
- 10113/7713681
- DOI:
- 10.3390/microorganisms10030545
- https://doi.org/10.3390/microorganisms10030545
- Author:
- Daniel Cook, et al. ; Aziza Ibrahim Noor; Amy Nava; Marwa Neyaz; Peter Cooke; Rebecca Creamer; Show all 6 Authors
- Source:
- Botany 2021 v.99 no.10 pp. 619-627
- ISSN:
- 1916-2804
- Subject:
- Chaetothyriales; Ipomoea carnea; fungi; glycoproteins; growth habit; hyphae; indolizidines; livestock; microscopy; mycelium; petioles; poisoning; swainsonine; symbionts; toxicity
- Abstract:
- ... Swainsonine, an indolizidine alkaloid, is an α-mannosidase and mannosidase II inhibitor that alters glycoprotein processing and causes lysosomal storage disease. Swainsonine is the toxic principle in several plant species worldwide and causes severe toxicosis in livestock grazing these plants. All swainsonine-containing plant taxa investigated to date are associated with fungal symbionts that prod ...
- DOI:
- 10.1139/cjb-2021-0037
- https://doi.org/10.1139/cjb-2021-0037
- Author:
- Daniel Cook, et al. ; Clinton A. Stonecipher; Stephen T. Lee; Kevin D. Welch; Dale R. Gardner; Show all 5 Authors
- Source:
- Toxicon 2022 v.215 pp. 6-10
- ISSN:
- 0041-0101
- Subject:
- Toxicoscordion paniculatum; acute toxicity; alkaloids; chemotypes; cold season; forbs; mice; risk; sheep; Western United States
- Abstract:
- ... Foothill death camas (Zigadenus paniculatus) is a native, cool-season, bulbous perennial forb found throughout the western U.S. The toxins in death camas are steroidal alkaloids. Zygacine is often the most abundant alkaloid in death camas and is believed to be the primary toxic component. A population of death camas with plants consisting of two different chemical profiles (chemotypes) growing wit ...
- Handle:
- 10113/7792651
- DOI:
- 10.1016/j.toxicon.2022.05.047
- CHORUS:
- 10.1016/j.toxicon.2022.05.047
- https://doi.org/10.1016/j.toxicon.2022.05.047
- Author:
- Daniel Cook, et al. ; Daniel G. Ubiali; Stephen T. Lee; Dale R. Gardner; Gabriela O. Pereira; Franklin Riet-Correa; Show all 6 Authors
- Source:
- Toxicon 2022 v.218 pp. 76-82
- ISSN:
- 0041-0101
- Subject:
- Cestrum; anorexia; blood; brain; cattle; constipation; death; encephalopathy; forage; hepatotoxins; leaves; liver; mucus; muscles; necrosis; Brazil
- Abstract:
- ... Cestrum axillare poisoning causes significant economic losses in farms of ruminant production due to a fatal acute hepatic disease. The consumption of C. axillare occurs on farms or pastures with a scarcity of feed or with dry forage. Epidemiological, clinical, and pathological data of poisoning outbreaks by C. axillare from 1953 to 2021 in grazing ruminants in southeastern Brazil are reported. A ...
- DOI:
- 10.1016/j.toxicon.2022.09.005
- https://doi.org/10.1016/j.toxicon.2022.09.005
- Author:
- Daniel Cook, et al. ; Stephen T. Lee; Dale R. Gardner; Russell J. Molyneux; Robert L. Johnson; Charlotte M. Taylor; Show all 6 Authors
- Source:
- Journal of agricultural and food chemistry 2021 v.69 no.14 pp. 4037-4047
- ISSN:
- 1520-5118
- Subject:
- chemical analysis; chemical composition; chemical constituents of plants; chemotypes; death; food chemistry; herbaria; landscapes; livestock; livestock and meat industry; pastures; poisonous plants; rangelands; risk; toxicity
- Abstract:
- ... Poisonous plants cause large losses to the livestock industry through death, reduced production efficiency, reproductive dysfunction, and compromised harvesting of rangeland and pasture forages. Research investigating poisonous plants is complex because there are hundreds of genera of toxic plants representing thousands of species. To investigate the effects of poisonous plants on livestock, a cle ...
- DOI:
- 10.1021/acs.jafc.1c00708
- https://doi.org/10.1021/acs.jafc.1c00708
- Author:
- Daniel Cook, et al. ; Aziza I. Noor; Marwa Neyaz; Rebecca Creamer; Show all 4 Authors
- Source:
- Current microbiology 2020 v.77 no.9 pp. 2554-2563
- ISSN:
- 0343-8651
- Subject:
- Alternaria; Astragalus mollissimus; Oxytropis; Swainsona; amino acid sequences; biochemical pathways; endophytes; fungi; glyceraldehyde-3-phosphate dehydrogenase; internal transcribed spacers; multigene family; peptides; polyketides; swainsonine; toxicity
- Abstract:
- ... Locoweeds are toxic leguminous plants in Astragalus and Oxytropis genera that contain fungal endophytes of Alternaria section Undifilum species. These fungi produce swainsonine, an alkaloid α-mannosidase inhibitor that causes a neurological syndrome, locoism in grazing animals. A SWN gene cluster has been identified in many swainsonine-producing fungi. The swnK gene, which is an essential componen ...
- DOI:
- 10.1007/s00284-020-02111-2
- https://doi.org/10.1007/s00284-020-02111-2
11. Toxicity of the swainsonine-containing plant Ipomoea carnea subsp. fistulosa for goats and sheep
- Author:
- Daniel Cook, et al. ; Carlos Alberto Oliveira; Gabriela Riet-Correa; Everton Lima; Rosane M.T. Medeiros; Cecilia Miraballes; James A. Pfister; Dale Gardner; Franklin Riet-Correa; Show all 9 Authors
- Source:
- Toxicon 2021 v.197 pp. 40-47
- ISSN:
- 0041-0101
- Subject:
- Ipomoea carnea subsp. fistulosa; body weight; forage; ingestion; sheep; swainsonine; toxicity
- Abstract:
- ... In order to determine the toxicity of swainsonine present in Ipomoea carnea for goats and sheep, 12 goats and 12 sheep were divided into 3 groups of 4 goats (G1, G2 and G3) and 3 groups of 4 sheep (S4, S5 and S6) each. Groups G1 and S4 were used as controls; G2 and S5 received 1 mg/kg body weight of swainsonine from plant material and G3 and S6 received 3 mg/kg. Groups G2 and G3 presented the firs ...
- DOI:
- 10.1016/j.toxicon.2021.04.013
- https://doi.org/10.1016/j.toxicon.2021.04.013
- Author:
- Daniel Cook, et al. ; Dale R. Gardner; Scott W. Larsen; Clinton A. Stonecipher; Robert Johnson; Show all 5 Authors
- Source:
- Phytochemistry 2020 v.178 pp. 112465
- ISSN:
- 0031-9422
- Subject:
- Gutierrezia sarothrae; abortifacients; alcohols; chemotypes; grazing; labdane; lactones; livestock; phytotoxins; plant taxonomy; poisonous weeds; rangelands; toxicity; Colorado; New Mexico; Oklahoma; Texas; Utah; Wyoming
- Abstract:
- ... Broom snakeweed (Gutierrezia sarothrae) and threadleaf snakeweed (G. microcephala) are suffrutescent plants found in many parts of western US rangelands and are possibly toxic to grazing livestock. The toxic components are not known, but it has been suggested that the diterpene acids may be both toxic and abortifacient. One hundred sixty-two samples of snakeweed were collected from 55 locations in ...
- Handle:
- 10113/7047130
- DOI:
- 10.1016/j.phytochem.2020.112465
- https://doi.org/10.1016/j.phytochem.2020.112465
- Author:
- Daniel Cook, et al. ; Clinton A. Stonecipher; Kevin D. Welch; Stephen T. Lee; James A. Pfister; Show all 5 Authors
- Source:
- Biochemical systematics and ecology 2020 v.89 no. pp. 104012
- ISSN:
- 0305-1978
- Subject:
- Cicuta; developmental stages; geographical variation; growing season; livestock; natural toxicants; phenology; phytotoxins; plant poisoning; poisonous plants; polyacetylenes; seasonal variation; secondary metabolites; seeds; stems; tubers; North America
- Abstract:
- ... Water hemlock (Cicuta spp.) plants are typically found in wet areas and are toxic to all species of livestock. The toxic components in water hemlock are C₁₇ polyacetylenes, with cicutoxin being the most studied. The objective of this study was to evaluate the variation in cicutoxin and total C₁₇ polyacetylene compounds in water hemlock populations across western North America. Cicutoxin and total ...
- Handle:
- 10113/6830194
- DOI:
- 10.1016/j.bse.2020.104012
- CHORUS:
- 10.1016/j.bse.2020.104012
- https://doi.org/10.1016/j.bse.2020.104012
- Author:
- Daniel Cook, et al. ; Clinton A. Stonecipher; Kevin D. Welch; Dale R. Gardner; James A. Pfister; Show all 5 Authors
- Source:
- Biochemical systematics and ecology 2020 v.90 pp. 104044
- ISSN:
- 0305-1978
- Subject:
- Toxicoscordion paniculatum; Zigadenus; aerial parts; bulbs; flowering; flowers; fruiting; grazing; growing season; livestock; mature plants; phenology; poisonous plants; risk; seasonal variation; senescence (aging); steroid alkaloids; toxicity; vegetative growth
- Abstract:
- ... Death camas (Zigadenus spp.) is a common poisonous plant in North America with plants occurring in a wide variety of habitats with species of toxic concern occurring primarily in meadows, grasslands, shrublands, and mountains. The toxicity of Zigadenus species has been attributed to a series of steroidal alkaloids. The objective of this study was to evaluate zygacine and total steroidal alkaloid c ...
- Handle:
- 10113/6883821
- DOI:
- 10.1016/j.bse.2020.104044
- CHORUS:
- 10.1016/j.bse.2020.104044
- https://doi.org/10.1016/j.bse.2020.104044
- Author:
- Daniel Cook, et al. ; Wilmer Perera; Kumudini Meepagala; Frank Fronczek; David Wedge; Stephen Duke; Show all 6 Authors
- Source:
- Molecules 2019 v.24 pp. 2-12
- ISSN:
- 1420-3049
- Subject:
- Agrostis stolonifera; Ambrosia; Glomerella cingulata; Lactuca sativa; Lemna; X-ray diffraction; active ingredients; agrochemicals; antifungal properties; branches; chalcones; circular dichroism spectroscopy; crystal structure; ethyl acetate; industry; inhibitory concentration 50; leaves; mass spectrometry; nuclear magnetic resonance spectroscopy; pesticides; phytotoxicity; quantum mechanics; quercetin; sesquiterpenoid lactones; thin layer chromatography
- Abstract:
- ... The discovery of potent natural and ecofriendly pesticides is one of the focuses of the agrochemical industry, and plant species are a source of many potentially active compounds. We describe the bioassay-guided isolation of antifungal and phytotoxic compounds from the ethyl acetate extract of Ambrosia salsola twigs and leaves. With this methodology, we isolated and identified twelve compounds (fo ...
- Handle:
- 10113/6471129
- DOI:
- https//doi:10.3390/molecules24050835
- https://doi.org/https//doi:10.3390/molecules24050835
- Author:
- Daniel Cook, et al. ; Benedict T. Green; Dale R. Gardner; Clint A. Stonecipher; Stephen T. Lee; James A. Pfister; Kevin D. Welch; T. Zane Davis; Bryan L. Stegelmeier; Show all 9 Authors
- Source:
- Rangelands 2020 v.42 no.1 pp. 1-8
- ISSN:
- 0190-0528
- Subject:
- Delphinium; administrative management; age; alkaloids; bulls; cattle breeds; chemistry; dosage; financial economics; heifers; pastures; poisoning; rangelands; steers; toxicity; yearlings
- Abstract:
- ... •Toxic larkspurs (Delphinium species) cause large economic losses from cattle deaths, increased management costs, and reduced utilization of pastures and rangelands.•Larkspur toxicity to cattle can vary by geographic location due to toxic alkaloid content.•Larkspur alkaloid chemistry can be used to predict plant toxicity.•Cattle breeds differ in their susceptibility to larkspur poisoning.•As cattl ...
- DOI:
- 10.1016/j.rala.2020.01.004
- CHORUS:
- 10.1016/j.rala.2020.01.004
- https://doi.org/10.1016/j.rala.2020.01.004
- Author:
- Daniel Cook, et al. ; Jacob M. Heiling; Stephen T. Lee; Rebecca E. Irwin; Show all 4 Authors
- Source:
- American journal of botany 2019 v.106 no.5 pp. 643-655
- ISSN:
- 0002-9122
- Subject:
- chemistry; flowers; gas chromatography; herbivores; leaves; piperidines; pollen; pollinators
- Abstract:
- ... PREMISE: Optimal defense theory predicts that selection should drive plants to disproportionally allocate resources for herbivore defense to tissues with high fitness values. Because pollen's primary role is the transport of gametes, plants may be expected to defend it from herbivory. However, for many animal‐pollinated plants, pollen serves a secondary role as a pollinator reward. These dual role ...
- DOI:
- 10.1002/ajb2.1283
- https://doi.org/10.1002/ajb2.1283
- Author:
- Daniel Cook, et al. ; Stephen T. Lee; Dale R. Gardner; Show all 3 Authors
- Source:
- Journal of agricultural and food chemistry 2017 v.65 no.26 pp. 5266-5277
- ISSN:
- 0021-8561
- Subject:
- Ipomoea asarifolia; diterpenoids; isomers; liquid chromatography; liquids; livestock; nuclear magnetic resonance spectroscopy; spectral analysis; tandem mass spectrometry; Australia; Brazil
- Abstract:
- ... Ipomoea asarifolia has been associated with a tremorgenic syndrome in livestock in Brazil and was recently reported to contain tremorgenic indole diterpenes. Ipomoea muelleri has been reported to cause a similar tremorgenic syndrome in livestock in Australia. Ipomoea asarifolia and I. muelleri were investigated by high-performance liquid chromatography–high-resolution mass spectometry (HPLC–HRMS) ...
- DOI:
- 10.1021/acs.jafc.7b01834
- https://doi.org/10.1021/acs.jafc.7b01834
- Author:
- Daniel Cook, et al. ; Agustin Martinez; Carlos A. Robles; Jessie M. Roper; Dale R. Gardner; Marwah S. Neyaz; Natalia Z. Joelson; Show all 7 Authors
- Source:
- Toxicon 2019 v.171 pp. 1-6
- ISSN:
- 0041-0101
- Subject:
- Alternaria; Astragalus; Oxytropis; endophytes; fungi; legumes; polymerase chain reaction; ribosomal DNA; seeds; swainsonine; symbionts; toxicity; China; North America; South America
- Abstract:
- ... Swainsonine has been identified as the toxin in legumes belonging to the genera Astragalus and Oxytropis throughout the world including China, North America, and South America. Several South American Astragalus species have been reported to contain swainsonine; however, data is lacking to support the presence of a fungal symbiont in South American Astragalus species as has been shown for North Ame ...
- DOI:
- 10.1016/j.toxicon.2019.09.020
- https://doi.org/10.1016/j.toxicon.2019.09.020
- Author:
- Daniel Cook, et al. ; Clinton A. Stonecipher; Stephen T. Lee; Benedict T. Green; Kevin D. Welch; James A. Pfister; Dale R. Gardner; Show all 7 Authors
- Source:
- Toxicon 2019 v.161 pp. 33-39
- ISSN:
- 0041-0101
- Subject:
- Delphinium; cattle; chemical analysis; chemotypes; death; diterpenoid alkaloids; high performance liquid chromatography; hills; indigenous species; mass spectrometry; mucus; nose; perennials; plant poisoning; rangelands; toxicity; Western United States
- Abstract:
- ... Larkspurs (Delphinium spp.) are native perennial plants that have a serious toxic potential to cattle on foothill and mountain rangelands in the western United States. Livestock death due to larkspur toxicity is attributed to norditerpenoid alkaloids. Diagnosing plant poisonings in livestock is often challenging. The objective of this study was to evaluate the use of three matrices; earwax, oral f ...
- DOI:
- 10.1016/j.toxicon.2019.02.013
- CHORUS:
- 10.1016/j.toxicon.2019.02.013
- https://doi.org/10.1016/j.toxicon.2019.02.013