Fraser Fir (Abis).- Root Rot (Phytophthora capsici).- Norway Maple (Acer platanoides).- Powdery Mildew (Sawadaii tulasnei).- Silver Maple (Acer saccharinum).- Bleeding Canker (Phytophthora cactorum and P. citricola).- White Snakeroot (Ageratina altissima).- Chlorotic Spots and Mosaic (Ag CSV) (Umbravirus).- Creeping Bentgrass (Agrostis stolonifera).- Foliar Blight (Colletotrichum cereale).- Onion (Allium cepa)

Iris Yellow Spot Virus (Family Bunyaviridae, Genus Tospovirus).- Onion (Allium cepa).- Twister Disease (Colletotrichum gloeosporium).- Alder (Alnus tenuifolia).- Alder Dieback (Valsa melanodiscus (Anamorph Cytospora umbriva).- Carolina Foxtail (Alopecurus carolinianus) Rice Blast Disease (Magnaporthe oryzae).- Bishop's Weed (Ammi majus).- Apium Virus Y and Bidens Mottle Virus (Potyvirus).- Angelonia (Angelonia axgustifolia).- Yellow Mottling (Alternanthera Mosaic Virus Potexvirus).- Celery and Poison Hemlock (Apium graveolens and Conium maculatum).- Stunting and Chlorotic Line Patterns (Apium Virus Y, Potyviridae).- Peanut (Arachis hypogaea).- Sclerotinia blight (Sclerotinia sclerotiorum).- Peanut (Arachis hypogaea).- TWSV Potyvirus and CMV (Zuccinia Yellow Mosaic, Peanut Mottle and Peanut Stripe).- Peanut (Arachis hypogaea) Collateral Hosts Annual Weeds (Ipomoea hederacea, I. coccinea)

Stem Rot and Shredding (Sclerotinia minor).- Valencia Peanut (Arachis hypogaea).- Stem Rot (Sclerotinia sclerotiorum).- Pawpaw (Asimina triloba).- Sooty Blotch and Flyspeck (Colletogloeum sp., Dissoconium aciculare, Peltaster sp. P21, P. fructicola, Stomiopeltis versicola, Stomiopeltis sp. RS1, and Dothiodeomycete sp. CS2.- Pawpaw (Asimina triloba).- Sooty Blotch and Flyspeck (Dissoconium aciculare, Peltaster sp. and Colletogloeum sp.).- Asparagus (Asparagus officinalis).- Spear and Root Rot (Phytophthora asparagi).- Sugar Beet (Beta vulgaris).- Yellowing Decline (Novel Fusarium Species).- Cabbage (Brassica oleracea).- Root Rot (Phytophthora drechsleri).- Turnip and Cabbage (Brassica rapa and B. oleracea).- Bacterial Leaf Spot (Xanthomonas campestris pv. campestris).- Turnip (Brassica rapa and other Brassicaceae including Arabidopsis thaliana).- Turnip Ringspot Virus (Comoviridae).- Buffalograss (Buchloe dactyloides).- Dollar Spot (Sclerotinia homoeocarpa).- Canna (Canna indica).- Mottling and Yellows (Canna Yellow Mottle Virus Family, Caulimoviridae).- Canna (Canna indica), Hosta (Hosta spp.), Peony (Paeonia spp.), Helleborus (Helleborus spp.), Diascia (Diascia spp.), Nemesia (Nemesia spp.).- Canna Yellow Mottle Virus (CaYMV), Hosta Virus X, Tobacco Rattle Virus (Peony), Helleborus Net Necrosis 'Black Death Disease' (Helleborus), Nemesia Ring Necrosis (Nemesia), Diascia Yellow Mottle, (Diascia), Tymovirus.- Chili Pepper (Capsicum annuum).- Fruit Set Failure (Novel Phytoplasma).- Pepper and Tomato (Capsicum annuum and Lycopersicum esculentum).- Little Leaf Phytoplasma (Phytoplasma asteris) (Aster Yellows Group).- Chile Pepper (Capsicum annuum).- Beet Mild Curly Top (Beet Mild Curly Top Curtovirus).- Orange Geiger (Cardia sebestena).- Tar Spot (Diatractium cordianum).- Papaya (Carica papaya).- Atypical Internal Yellowing (Enterobacter cloacae).- Bitternut Hickory (Carya cordiformis).- Annual Canker and Bitternut Decline and Death (Fusarium solani and Ceratocystis smalleyi).- Hackberry (Celtis occidentalis).- Angular Yellow Leaf Spot (Grapevine L
About the Author:

Dr. Horst received his BS degree from Ohio University in Plant Science in 1957; his MS and Ph.D. degrees from Ohio State University in Plant Pathology in 1959 and 1962 respectively. He was Director of the Plant Pathology Laboratory at Yoder Bros. in Barberton, Ohio, 1962-1968. In 1968 he was appointed Assistant Professor of Plant Pathology at Cornell University. He subsequently became Associate Professor in 1974 and Full Professor in 1980. In addition to research, teaching and extension responsibilities, he also served as advisor for masters and doctoral students. He has authored or co-authored more than 230 articles which include books, book chapters and invitational papers, and has guest lectured nationally and internationally. Horst wrote the 4th, 5^th, 6th and 7^th editions of Westcott's Plant Disease Handbook, the 1st edition of the Compendium of Rose Diseases, the Compendium of Chrysanthemum Diseases and the 2nd edition of the Compendium of Rose Diseases and Pests. He is presently President and CEO of H&I Agritech, Inc., which develops biocompatible (environmentally safe) pesticides for disease and pest control.