Search

Your search keyword '"Choi, Man-Yeon"' showing total 221 results
Start Over Author "Choi, Man-Yeon"
221 results on '"Choi, Man-Yeon"'

13. Identification and characterisation of PRXamide peptides in the western flower thrips, Frankliniella occidentalis.

Author

Yun, Seung‐Hwan, Jang, Hyo Sang, Ahn, Seung‐Joon, Price, Briana E., Hasegawa, Daniel K., and Choi, Man‐Yeon

Subjects
FRANKLINIELLA occidentalis, THRIPS, PEPTIDES, G protein coupled receptors, NEUROPEPTIDES
Abstract

Insect CAPA‐PVK (periviscerokinin) and pyrokinin (PK) neuropeptides belong to the PRX family peptides and are produced from capa and pyrokinin genes. We identified and characterised the two genes from the western flower thrips, Frankliniella occidentalis. The capa gene transcribes three splice variants, capa‐a, ‐b, and ‐c, encoding two CAPA‐PVKs (EVQGLFPFPRVamide; QGLIPFPRVamide) and two PKs (ASWMPSSSPRLamide; DSASFTPRLamide). The pyrokinin mRNA encodes three PKs: DLVTQVLQPGQTGMWFGPRLamide, SEGNLVNFTPRLamide, and ESGEQPEDLEGSMGGAATSRQLRTDSEPTWGFSPRLamide, the most extended pheromone biosynthesis activating neuropeptide (PBAN) ortholog in insects. Multiple potential endoproteolytic cleavage sites were presented in the prepropeptides from the pyrokinin gene, creating ambiguity to predict mature peptides. To solve this difficulty, we used three G protein‐coupled receptors (GPCRs) for CAPA‐PVK, tryptophan PK (trpPK), and PK peptides, and evaluated the binding affinities of the peptides. The binding activities revealed each subfamily of peptides exclusively bind to their corresponding receptors, and were significant for determining the CAPA‐PVK and PK peptides. Our biological method using specific GPCRs would be a valuable tool for determining mature peptides, particularly with multiple and ambiguous cleavage sites in those prepropeptides. Both capa and pyrokinin mRNAs were strongly expressed in the head/thorax, but minimally expressed in the abdomen. The two genes also were clearly expressed during most of the life stages. Whole‐mounting immunocytochemistry revealed that neurons contained PRXamide peptides throughout the whole‐body: four to six neurosecretory cells in the head, and three and seven pairs of immunostained cells in the thorax and abdomen, respectively. Notably, the unusual PRXamide profiles of Thysanoptera are different from the other insect groups. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

19. Nonnutritive Sugars for Spotted-Wing Drosophila (Diptera: Drosophilidae) Control Have Minimal Nontarget Effects on Honey Bee Larvae, a Pupal Parasitoid, and Yellow Jackets.

Author

Price, Briana E, Breece, Carolyn, Galindo, Gracie, Greenhalgh, Abigail, Sagili, Ramesh, Choi, Man-yeon, and Lee, Jana C

Subjects
DROSOPHILA suzukii, HONEYBEES, DROSOPHILIDAE, DIPTERA, DROSOPHILA, LARVAE, ERYTHRITOL, HONEY
Abstract

Drosophila suzukii Matsumura, spotted-wing drosophila, is a major pest of small fruits and cherries and often managed with conventional insecticides. Our previous work found that erythritol, a nonnutritive polyol, has insecticidal properties to D. suzukii. Two formulations of erythritol (1.5M), with 0.5M sucrose or 0.1M sucralose, are most effective at killing D. suzukii. In this study, we investigated the nontarget effects of these erythritol formulations on honey bee Apis mellifera Linnaeus larvae, a pupal parasitoid of D. suzukii , Pachycrepoideus vindemiae Rondani, and western yellow jacket, Vespula pensylvanica Saussure. We directly exposed honey bee larvae by adding a high dose (2 µl) to larval cells and found no significant mortality from either formulation compared to the water control. Pachycrepoideus vindemiae may encounter erythritol in field settings when host plants of D. suzukii are sprayed. The erythritol+sucralose formulation was more detrimental than erythritol+sucrose to P. vindemiae , however, this effect was greatly reduced within a 21-d period when a floral source was present. Since yellow jackets are a nuisance pest and were attracted to the erythritol formulations in recent field trials, we tested adult V. pensylvanica survival with continuous consumption of these formulations in the laboratory. We found no detectable detriment from either formulation, compared to the sucrose control. Overall, both erythritol formulations caused minimal nontarget effects on honey bee larvae, P. vindemiae parasitoids, and western yellow jackets. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

24. Drosophila suzukii (Diptera: Drosophilidae): A Decade of Research Towards a Sustainable Integrated Pest Management Program

Author

Tait, Gabriella, primary, Mermer, Serhan, additional, Stockton, Dara, additional, Lee, Jana, additional, Avosani, Sabina, additional, Abrieux, Antoine, additional, Anfora, Gianfranco, additional, Beers, Elizabeth, additional, Biondi, Antonio, additional, Burrack, Hannah, additional, Cha, Dong, additional, Chiu, Joanna C, additional, Choi, Man-Yeon, additional, Cloonan, Kevin, additional, Crava, Cristina M, additional, Daane, Kent M, additional, Dalton, Daniel T, additional, Diepenbrock, Lauren, additional, Fanning, Phillip, additional, Ganjisaffar, Fatemeh, additional, Gómez, Miguel I, additional, Gut, Larry, additional, Grassi, Alberto, additional, Hamby, Kelly, additional, Hoelmer, Kim A, additional, Ioriatti, Claudio, additional, Isaacs, Rufus, additional, Klick, Jimmy, additional, Kraft, Laura, additional, Loeb, Gregory, additional, Rossi-Stacconi, Marco Valerio, additional, Nieri, Rachele, additional, Pfab, Ferdinand, additional, Puppato, Simone, additional, Rendon, Dalila, additional, Renkema, Justin, additional, Rodriguez-Saona, Cesar, additional, Rogers, Mary, additional, Sassù, Fabiana, additional, Schöneberg, Torsten, additional, Scott, Maxwell J, additional, Seagraves, Michael, additional, Sial, Ashfaq, additional, Van Timmeren, Steven, additional, Wallingford, Anna, additional, Wang, Xingeng, additional, Yeh, D Adeline, additional, Zalom, Frank G, additional, and Walton, Vaughn M, additional

Published
2021
Full Text
View/download PDF

43. Drosophila suzukii(Diptera: Drosophilidae): A Decade of Research Towards a Sustainable Integrated Pest Management Program

Author

Tait, Gabriella, Mermer, Serhan, Stockton, Dara, Lee, Jana, Avosani, Sabina, Abrieux, Antoine, Anfora, Gianfranco, Beers, Elizabeth, Biondi, Antonio, Burrack, Hannah, Cha, Dong, Chiu, Joanna C, Choi, Man-Yeon, Cloonan, Kevin, Crava, Cristina M, Daane, Kent M, Dalton, Daniel T, Diepenbrock, Lauren, Fanning, Phillip, Ganjisaffar, Fatemeh, Gómez, Miguel I, Gut, Larry, Grassi, Alberto, Hamby, Kelly, Hoelmer, Kim A, Ioriatti, Claudio, Isaacs, Rufus, Klick, Jimmy, Kraft, Laura, Loeb, Gregory, Rossi-Stacconi, Marco Valerio, Nieri, Rachele, Pfab, Ferdinand, Puppato, Simone, Rendon, Dalila, Renkema, Justin, Rodriguez-Saona, Cesar, Rogers, Mary, Sassù, Fabiana, Schöneberg, Torsten, Scott, Maxwell J, Seagraves, Michael, Sial, Ashfaq, Van Timmeren, Steven, Wallingford, Anna, Wang, Xingeng, Yeh, D Adeline, Zalom, Frank G, and Walton, Vaughn M

Abstract

Drosophila suzukii(Matsumura) (Diptera: Drosophilidae) also known as spotted-wing drosophila (SWD), is a pest native to Southeast Asia. In the last few decades, the pest has expanded its range to affect all major European and American fruit production regions. SWD is a highly adaptive insect that is able to disperse, survive, and flourish under a range of environmental conditions. Infestation by SWD generates both direct and indirect economic impacts through yield losses, shorter shelf life of infested fruit, and increased production costs. Fresh markets, frozen berries, and fruit export programs have been impacted by the pest due to zero tolerance for fruit infestation. As SWD control programs rely heavily on insecticides, exceedance of maximum residue levels (MRLs) has also resulted in crop rejections. The economic impact of SWD has been particularly severe for organic operations, mainly due to the limited availability of effective insecticides. Integrated pest management (IPM) of SWD could significantly reduce chemical inputs but would require substantial changes to horticultural management practices. This review evaluates the most promising methods studied as part of an IPM strategy against SWD across the world. For each of the considered techniques, the effectiveness, impact, sustainability, and stage of development are discussed.Graphical Abstract

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results