Horticulture/Verbena

Verbena Verbena bonariensis1.jpg Verbena Verbenaceae Annuals, Perennials Insects Verbena (Verbena or Vervain) is a genus of about 250 species of annual and perennial herbaceous plants in the Verbenaceae. The majority of the species are native to the New World from Canada south to southern Chile, but a few also native in the Old World, mainly in Europe (V. officinalis, V. supina). Description The leaves are usually opposite, simple, and in many species hairy, often densely so. The flowers are small, white, pink, purple or blue, with five petals, and borne in dense cymes or panicles. The stems are square in cross section. Roots are fibrous. Species Uses Grown for the showy flowers and generally good foliage, but some species are used as medicinal and culinary herbs. Maintenance Propagation Propagated by seed, division, or summer cuttings. Harvesting Pests and diseases Bacterial ../Wilts/ Pseudomonas solacearum ../Powdery Mildew/ Erisiphe chichoracearum ../Leaf Spots/ Septoria ../Flower Blights/ Botrytis cinerea ../Stem Rots/ Macrophomina phaseoli Pellicularia filamentosa Phymatotrichum omnivorum Thielaviopsis basicola ../Rusts/ ../Nematodes/ ../Aphelenchoides olesistus/ ../Meliodgyne hapla/ ../Aphids/ Foxglove Aphid: ../Acyrthosiphon solani/ Melon Aphid: ../Aphis gossypii/ Green Peach Aphid: ../Myzus persicae/ ../Whiteflies/ Greenhouse Whitefly: ../Trialeurodes vaporariorum/ Silverleaf Whitefly: ../Bemisia argentifolii/ ../Scales/ Cottony Cushion Scale: ../Icerya purchasi/ ../Bugs/ Tarnished Plant Bug: ../Lygus lineolaris/ Greenhouse Orthezia: ../Orthezia insignis/ ../Thrips/ Western Flower Thrips: ../Frankliniella occidentalis/ Flower Thrips: ../Frankliniella thricti/ Greenhouse Thrips: ../Heliothrips haemorrhoidalis/ ../Beetles/ Clematis Blister Beetle: ../Epicauta cinerea/ ../Maggots/ Vervain Leaf Miner: ../Agromyza artemesiae/ ../Caterpillars/ Oblique Banded Leafroller: ../Choristoneura rosaceana/ Yellow Woolybear Caterpillar: ../Diacrisia virginica/ Vervain Bud Moth: ../Endothenia hebesana/ Morning Glory Leaf Cutter: ../Loxostege obliteralis/ Garden Webworm: ../Loxostege similalis/ Tobacco Budworm: ../Heliothis virescens/ ../Mites/ Broad Mite: ../Rhizoglyphus echinopus/ Cyclamen Mite: ../Steneotarsonemus pallidus/ Two-spotted Spider Mite: ../Tetranychus urticae/ References Verbena Ann Fowler Rhoads and Timothy A. Block Anna Anisko, illustrator The Plants of Pennsylvania: An Illustrated Manual 2000 Morris Arboretum, University of Pennsylvania Press 698-699 Christopher Brickell and Judith D. Zuk The American Horticultural Society A-Z Encyclopedia of Garden Plants 1997 DK Publishing 1044-1045 Staff of the L. H. Bailey Hortorium Hortus Third: A Concise Dictionary of Plants Cultivated in the United States and Canada 1976 Cornell University Press 1148-1149 Pirone Pascal P. Diseases & Pests of Ornamental Plants Fifth Edition 1978 John Wiley & Sons, New York 527-528 Cranshaw Whitney Garden Insects of North America: The Ultimate Guide to Backyard Bugs 2004 Princeton University Press 625 Pippa Greenwood, Andrew Halstead, A.R. Chase, Daniel Gilrein American Horticultural Society Pests & Diseases: The Complete Guide to Preventing, Identifying, and Treating Plant Problems First Edition 2000 Dorling Kindersley (DK) Publishing, inc. 201