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Leona  Horst    Horticulturist /ARSUserFiles/2593/Leona.jpg Leona Horst 1680 Madison Ave. Wooster Ohio 44691 (330) 201-7863   My research conducts IR4 trials at various locations with different soil types and collaborates with other ARS and University scientists on various projects including biological control of diseases on ornamentals in the greenhouse; spray drift studies in greenhouse and field locations; identification, maintenance of viable fungal cultures; analysis and interpretation of data from projects; sample preparation and operation of scanning electron microscopes or transmission electron microscope under a variety of conditions and samples including pesticide characterization and deposition.  Leona Horst Google scholar  **Research experience:** 1977-1990
Physical science technician, Soft Wheat Quality Lab, USDA, ARS, Wooster, OH1990-2003
Biological Laboratory Technician, USDA, ARS, Application Technology Research Unit, Wooster, OH2003-2007
Plant Pathologist, USDA, ARS, Application Technology Research Unit, Wooster, OH2007-present
Horticulturist, USDA, ARS, Application Technology Research Unit, Wooster, OH  **Educational background:** 1972-1976
University of Akron: B.S. in biology, 19761987-1990
University of Akron: B.A. in secondary education, 19901991-1997
The Ohio State University:  M.S. Plant Pathology, 19972001-2007
The Ohio State University: graduate classes in Agronomy and Agricultural Education       Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Management of pest insects and plant diseases in fruit and nursery production with laser-guided variable-rate sprayers-(Peer Reviewed Journal) Chen, L., Zhu, H., Horst, L., Wallhead, M., Reding, M.E., Fulcher, A. 2020. Management of pest insects and plant diseases in fruit and nursery production with laser-guided variable-rate sprayers. HortScience. 56(1):94–100. https://doi.org/10.21273/HORTSCI15491-20.Control of insect pests and diseases in an Ohio fruit farm with a laser-guided intelligent sprayer-(Peer Reviewed Journal) Chen, L., Wallhead, M., Reding, M.E., Horst, L., Zhu, H. 2020. Control of insect pests and diseases in an Ohio fruit farm with a laser-guided intelligent sprayer. HortTechnology. 30(2):168-175. https://doi.org/10.21273/horttech04497-19.Characterization of biological pesticide deliveries through hydraulic nozzles-(Peer Reviewed Journal) Xiao, L., Zhu, H., Wallhead, M.W., Horst, L., Ling, P., Krause, C.R. 2018. Characterization of biological pesticide deliveries through hydraulic nozzles. Transactions of the ASABE. 61(3):897-908. https://doi.org/10.13031/trans.12698.Comparative morphology and distribution of antennal sensilla on Xylosandrus germanus and Xylosandrus crassiusculus (Coleoptera: Curculionidae: Scolytinae)-(Peer Reviewed Journal) Ranger, C.M., Horst, L., Barnett, J.L., Reding, M.E., Anderson, B.A., Krause, C.R. 2017. Comparative morphology and distribution of antennal sensilla on Xylosandrus germanus and Xylosandrus crassiusculus (Coleoptera: Curculionidae: Scolytinae). Annals of the Entomological Society of America. 110:172-188.Determination of foliar uptake of water droplets on waxy leaves in controlled environmental system-(Peer Reviewed Journal) Gao, J., Zhu, H., Horst, L., Krause, C.R. 2015. Determination of foliar uptake of water droplets on waxy leaves in controlled environmental system. Transactions of the ASABE. 58(4):1017-1024.Population dynamics of the fusarium head blight biocontrol agent cryptococcus flavescens OH182.9 on wheat anthers and heads-(Peer Reviewed Journal) Schisler, D.A., Core, A.B., Boehm, M.J., Horst, L., Krause, C.R., Dunlap, C.A., Rooney, A.P. 2014. Population dynamics of the Fusarium head blight biocontrol agent Cryptococcus flavescens OH182.9 on wheat anthers and heads. Biological Control. 70(1):17-27.Effect of higher rate of quintec for the control of powdery mildew on cucumber, 2012-(Abstract Only) Krause, C.R., Horst, L. 2013. Effect of higher rate of quintec for the control of powdery mildew on cucumber, 2012. Plant Disease Management Reports. 7:V160.Evaluation of acibenzolar for the control of bacterial spot on bell pepper, 2012-(Abstract Only) Krause, C.R., Horst, L. 2013. Evaluation of acibenzolar for the control of bacterial spot on bell pepper, 2012. Plant Disease Management Reports. 7:V162.Effect of higher rate of quintec for the control of powdery mildew on summer squash, 2012-(Abstract Only) Krause, C.R., Horst, L. 2013. Effect of higher rate of quintec for the control of powdery mildew on summer squash, 2012. Plant Disease Management Reports. 7:V161.Evaluation of quintec for the control of powdery mildew and bacterial spot on fresh market tomato, 2012-(Abstract Only) Krause, C.R., Horst, L. 2013. Evaluation of quintec for the control of powdery mildew and bacterial spot on fresh market tomato, 2012. Plant Disease Management Reports. 7:V159.Evaluation of phytotoxicity of Ridomil Gold Copper on turnip greens, 2010-(Research Technical Update) Krause, C.R., Horst, L. 2011. Evaluation of phytotoxicity of Ridomil Gold Copper on turnip greens, 2010. Plant Disease Management Reports. 5:V018.Interaction of Calibrachoa and selected root and foliar pathogens in greenhouse settings-(Peer Reviewed Journal) Omer, M.A., Locke, J.C., Frantz, J., Horst, L., Krause, C.R. 2011. Interaction of Calibrachoa and selected root and foliar pathogens in greenhouse settings. Acta Horticulturae. 893:173-180.Effects of Sprayer Configuration of Efficacy for the Control of Scab on Crabapple Using Electron Beam Analysis-(Peer Reviewed Journal) Krause, C.R., Derksen, R.C., Horst, L., Zhu, H., Zondag, R. 2009. Effects of Sprayer Configuration of Efficacy for the Control of Scab on Crabapple Using Electron Beam Analysis. Scanning. 31:24-27.Interaction of Calibrachoa and Selected Root and Foliar Pathogens in Greenhouse Setting-(Proceedings) Omer, M.A., Locke, J.C., Frantz, J., Horst, L., Krause, C.R. 2009. Interaction of Calibrachoa and Selected Root and Foliar Pathogens in Greenhouse Setting. International Symposium on High Technology for Greenhouse Systems, June 14-19, 2009, Quebec City, Quebec Canada. p.145.Detection and Quantification of Silicon in Floricultural Crops Utilizing Three Distinct Analytical Methods-(Peer Reviewed Journal) Frantz, J., Locke, J.C., Datnoff, L., Omer, M.A., Widrig, A.K., Sturtz, D.S., Horst, L., Krause, C.R. 2008. Detection and Quantification of Silicon in Floricultural Crops Utilizing Three Distinct Analytical Methods. Communications in Soil Science and Plant Analysis. 39:2734-2751.Suppression of Botrytis Gray Mold in Hiemalis Begonia with Potting Mix Amendments-(Other) Locke, J.C., Horst, L., Krause, C.R. 2005. Suppression of Botrytis Gray Mold in Hiemalis Begonia with Potting Mix Amendments. Resource. 1(1):6-7.SUPPRESSION OF BOTRYTIS BLIGHT OF BEGONIA BY TRICHODERMA HAMATUM 382 IN PEAT AND COMPOST-AMENDED POTTING MIXES-(Peer Reviewed Journal) Horst, L., Locke, J.C., Krause, C.R., Mcmahon, R.W., Madden, L.V., Hoitink, H.A. 2005. Suppression of botrytis blight of begonia by trichoderma hamatum 382 in peat and compost-amended potting mixes. Plant Disease. 89:1195-1200.DO CIRCADIAN RHYTHMS ACCENTUATE K-DEFICIENCY IN GERANIUM?-(Abstract Only) Pitchay, D., Gray, J., Frantz, J., Horst, L., Krause, C.R. 2005. Do circadian rhythms accentuate k-deficiency in geranium? [abstract]. Hortscience. 40(4):132.SUSCEPTIBILITY OF TRAILING PETUNIA CALIBRACHOA X HYBRIDA TO INFECTION BY FOLIAR AND ROOT FUNGAL PATHOGENS-(Peer Reviewed Journal) Omer, M.A., Horst, L., Locke, J.C., Pitchay, D., Krause, C.R. 2005. Susceptibility of trailing petunia calibrachoa x hybrida to infection by foliar and root fungal pathogens. Phytopathology. 95(6):S77.Silicon is Deposited in Leaves of New Guinea Impatiens-(Peer Reviewed Journal) Frantz, J., Dharmalingam, D.S., Locke, J.C., Horst, L., Krause, C.R. 2005. Silicon is deposited in leaves of New Guinea Impatiens. Plant Health Progress. Available: http://www.plantmanagementnetwork.org/php.Detection and Quantification of Nursery Spray Penetration and Off-Target Loss with Electron Beam and Conductivity Analysis-(Peer Reviewed Journal) Krause, C.R., Zhu, H., Derksen, R.C., Brazee, R.D., Fox, R.D., Horst, L., Zondag, R.H. 2004. Detection and Quantification of Nursery Spray Penetration and Off-Target Loss with Electron Beam and Conductivity Analysis. Transactions of the ASAE. 47(2):375-384.SUPRESSION OF POWDERY MILDEW AND GRAY MOLD OF BEGONIA INDUCED BY TRICHODERMA HAMATUM 382 IN PEAT AND COMPOST AMENDED POTTING MIXES-(Abstract Only) Horst, L., Krause, C.R., Madden, L.V., Hoitink, H.A. 2003. Supression of powdery mildew and gray mold of begonia induced by trichoderma hamatum 382 in peat and compost amended potting mixes. Phytopathology. 93(6):537.BIOLOGICAL SUPPRESSION OF FOLIAR DISEASES OF ORNAMENTAL PLANTS WITH COMPOSTED MANURES, BIOSOLIDS, AND TRICHODERMA HAMATUM 382-(Abstract Only) Hoitink, H.A., Musselman, C.A., Moore, T.L., Horst, L., Krause, C.R., Zondag, R.A., Mathers, H. 2003. Biological suppression of foliar diseases of ornamental plants with composted manures, biosolids, and trichoderma hamatum 382. Extension Circular. 189:50-56.The Effects of Sprayer Configuration on Efficacy for the Control of Scab on Crabapple-(Experiment Station) Krause, C.R., Derksen, R.C., Horst, L., Zondag, R., Brazee, R.D., Klein, M.G., Reding, M.E. 2003. The Effects of Sprayer Configuration on Efficacy for the Control of Scab on Crabapple. Extension Circular. 189:65-68CALCIUM CHLORIDE AS AN ALTERNATIVE CONTROL FOR BOTRYTIS CINEREA ON         TUBEROUS BEGONIA IN THE GREENHOUSE-(Peer Reviewed Journal)CONTROL OF BOTRYTIS CINEREA AND GRAY MOLD ON TUBEROUS BEGONIA WITH CALCIUM CHLORIDE-(Abstract Only)MOROPHOLOGICAL AND CHEMICAL PROPERTIES OF PLASTIC WASTES IN COMPOST-(Peer Reviewed Journal)EFFICACY OF CALCIUM CHLORIDE AS AN ALTERNATIVE CONTROL FOR BOTRYTIS        CINEREA ON BEGONIA IN THE GREENHOUSE-(Abstract Only)AIRBLAST SPRAY COVERAGE AND DRIFT MEASURED IN A NURSERY WITH ELECTRON BEAM AND CONDUCTIVITY ANALYSIS-(Abstract Only)


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