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233 results on '"Meikle, William G."'

1. HBeeID: a molecular tool that identifies honey bee subspecies from different geographic populations

Author

Donthu, Ravikiran, Marcelino, Jose A. P., Giordano, Rosanna, Tao, Yudong, Weber, Everett, Avalos, Arian, Band, Mark, Akraiko, Tatsiana, Chen, Shu-Ching, Reyes, Maria P., Hao, Haiping, Ortiz-Alvarado, Yarira, Cuff, Charles A., Claudio, Eddie Pérez, Soto-Adames, Felipe, Smith-Pardo, Allan H., Meikle, William G., Evans, Jay D., Giray, Tugrul, Abdelkader, Faten B., Allsopp, Mike, Ball, Daniel, Morgado, Susana B., Barjadze, Shalva, Correa-Benitez, Adriana, Chakir, Amina, Báez, David R., Chavez, Nabor H. M., Dalmon, Anne, Douglas, Adrian B., Fraccica, Carmen, Fernández-Marín, Hermógenes, Galindo-Cardona, Alberto, Guzman-Novoa, Ernesto, Horsburgh, Robert, Kence, Meral, Kilonzo, Joseph, Kükrer, Mert, Le Conte, Yves, Mazzeo, Gaetana, Mota, Fernando, Muli, Elliud, Oskay, Devrim, Ruiz-Martínez, José A., Oliveri, Eugenia, Pichkhaia, Igor, Romane, Abderrahmane, Sanchez, Cesar Guillen, Sikombwa, Evans, Satta, Alberto, Scannapieco, Alejandra A., Stanford, Brandi, Soroker, Victoria, Velarde, Rodrigo A., Vercelli, Monica, and Huang, Zachary

Published
2024
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12. Almond moth oviposition patterns in continuous layers of peanuts

Author

Mankin, Richard W, Hagstrum, David W, Nansen, Christian, and Meikle, William G

Subjects
Cadra cautella, Spatial association, Aggregation, Morisita index, Variogram, Zoology, Entomology
Abstract

The spatial distribution of eggs laid over a 48-h period by individual female almond moths, Cadra cautella Walker (Lepidoptera: Pyralidae), was examined in bioassays where peanuts covered either the center quarter (quarter-coverage) or the whole (whole-coverage) of a 120-cm square arena gridded into 3 by 3-cm cells. The mean total of eggs laid in quarter-coverage bioassays was not significantly different from the mean in whole-coverage bioassays, i. e., neither food coverage limited oviposition. However, the maximum count of eggs laid in any cell was higher in whole- than in quarter-coverage bioassays, and eggs were more aggregated near edges of the arena in whole-coverage bioassays than near edges of the peanuts in quarter-coverage bioassays. In addition, eggs were aggregated near the release point where females initially encountered food cues. These results suggest that almond moth oviposition behavior in continuous areas of peanuts was similar to patterns observed previously for stored-product insect oviposition in small, scattered food patches. In both cases, females walked or flew between separate oviposition events where eggs were laid in small clumps or lines. Possible behaviors resulting in aggregations of eggs near edges of food, walls, boundaries, or entrances are discussed and implications for precision targeting of insects in food storage areas are considered. © 2014.

Published
2014

13. Journal impact factors

Author

Nansen, Christian and Meikle, William G

Subjects
Microbiology, Plant Biology, Biological Sciences, Evolutionary Biology, Journal Impact Factor, Periodicals as Topic, Research, Time Factors, Crop and Pasture Production, Plant Biology & Botany, Evolutionary biology, Plant biology
Published
2014

26. Honey bee colonies maintain CO2 and temperature regimes in spite of change in hive ventilation characteristics.

Author

Meikle, William G., Barg, Aidan, and Weiss, Milagra

Subjects
*BEE colonies, *BEE products, *HONEYBEES, *BEES, *VENTILATION, *REGIME change, *SPECIFIC gravity, *INSECT societies
Abstract

CO2, a byproduct of respiration, is toxic at high concentrations so regulation of CO2 within the honey bee hive is an important colony function. In this study, we measured hive CO2 concentrations at 1-s intervals while ventilation characteristics of the hive were changed every few days, and we analyzed the data for effects of increased ventilation on colony behavior and thermoregulation. Average CO2 concentrations were significantly higher, by > 200 ppm, when hives had screened bottom boards (higher ventilation) compared to hives with solid bottom boards (lower ventilation) at the same time. Daily CO2 concentration amplitudes, hourly temperature, daily temperature amplitudes, nor hourly hive weight changes were not significantly affected by the changes in hive ventilation. In a second experiment, we found average CO2 concentrations at the top center of the upper hive box, on top of the frames, were significantly lower than concentrations at the center of a solid bottom board underneath frames, which was expected due to the higher density of CO2 relative to air. Bee colonies have been reported to cycle air, with shorter periods of 20 to 150 s and longer periods of 42–80 min, but a periodogram analysis of the CO2 concentration data found no evidence of important CO2 cycle periods other than a strong 24-h period. Bee colonies maintained strong daily cycles of CO2 concentration, with average maximum concentrations > 11,000 ppm, even in conditions of increased ventilation, indicating that managing CO2 concentration is a complex colony behavior. [ABSTRACT FROM AUTHOR]

Published
2022
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37. Counties not countries: Variation in host specificity among populations of an aphid parasitoid

Author

Hopper, Keith R., primary, Oppenheim, Sara J., additional, Kuhn, Kristen L., additional, Lanier, Kathryn, additional, Hoelmer, Kim A., additional, Heimpel, George E., additional, Meikle, William G., additional, O’Neil, Robert J., additional, Voegtlin, David G., additional, Wu, Kongming, additional, Woolley, James B., additional, and Heraty, John M., additional

Published
2019
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47. Two strains of Pseudomonas fluorescens bacteria differentially affect survivorship of waxworm ( Galleria mellonella ) larvae exposed to an arthropod fungal pathogen, Beauveria bassiana

Author

Meikle, William G., Bon, Marie-Claude, Cook, Steve C., Gracia, Carlos, and Jaronski, Stefan T.

Subjects
parasitic diseases, fungi
Abstract

Two strains of Pseudomonas fluorescens were found contaminating a biopesticide used in a previous study against Varroa destructor infestations in honey bee hives. 15 In that study, the biopesticide, a formulation of a fungal pathogen of arthropods, Beauveria bassiana, failed to have any negative impact on the mite infestation despite successful results in previous studies using uncontaminated batches of the same biopesticide. The objective of the present research was to determine whether the bacteria may have interfered with the infectivity and/or virulence of B. 20 bassiana in a simplified system; positive results in that system would then provide a rationale for further work under more complex conditions. Galleria mellonella late instar larvae treated topically with both a bacterial suspension of 6.8 to 7.0 107 cfu/ml and a fungal suspension of 2.5107 or 2.5108 B. bassiana conidia/ ml showed, in the case of one of the bacterial strains, significantly increased 25 survivorship compared to larvae treated with just the B. bassiana suspension. When larvae were immersed in a bacterial suspension prior to application of B. bassiana suspension using a spray tower, a significant positive effect of the same P. fluorescens strain on larval survivorship was observed at 2.5108 conidia/ml. Neither the bacterial suspensions alone nor blank control solutions had any effect 30 on larval survivorship. These results show that an interaction between the bacteria and the pathogen may explain some of the results from the prior field trial.

Published
2013

48. Efficacy of an autodisseminator of an entomopathogenic fungus, Isaria fumosorosea, to suppress Asian citrus psyllid, Diaphorina citri, under greenhouse conditions

Author

Patt, Joseph M., primary, Chow, Andrew, additional, Meikle, William G., additional, Gracia, Carlos, additional, Jackson, Mark A., additional, Flores, Daniel, additional, Sétamou, Mamoudou, additional, Dunlap, Christopher A., additional, Avery, Pasco B., additional, Hunter, Wayne B., additional, and Adamczyk, John J., additional

Published
2015
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