Horticulture/Pests and Diseases of Iris

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Note to Contributors:
The Pest and Disease list pages should always be included on the genus or genera page. These lists should eventually be replaced by a "troubleshooting" section. (This notice will not appear on printouts or on the including page.)

Use {{:Horticulture/Pests and Diseases of {{SUBPAGENAME}}}} to include the list below (place it just below "Pests and Diseases")

Pests

Melon Aphid: Aphis gossypii
True Bulb Aphid: Dysaphis tulipae
Potato Aphid: Macrosiphum euphorbiae
Crescent-marked Lily Aphid: Neomyzus circumflexus
Peach Aphid: Myzus persicae

Florida Red Scale: Chrysomphalus aonidum

Iris Whitefly: Aleyrodes spiraeoides

Ground Mealybug: Rhizocecus falcifer

Bugs

Plant Bug: Lopidea confluenta

Tobacco Thrips: Frankliniella fusca
Iris Thrips: Iridothrips iridis
Gladiolus Thrips: Thrips simplex
Onion Thrips: Thrips tabaci
Rose Thrips: Thrips major

Lesser Bulb Fly: Enumerus tuberculatus
Narcissus Bulb Fly: Merodon equestris

Japanese Beetle: Popillia japonica

Iris Weevil: Monomychus vulpeculus

Caterpillars

Zebra Caterpillar: Ceramica picta
Verbena Bud Moth: Endothenia hebesana
Iris Borer: Macronoctua onusta
Stalk Borer: Papaipema nebris

Bulb Mite: Rhizoglyphus echinopus

Slugs and Snails

Diseases

Bacterial Leaf Spots

Xanthomonas tardicrescens

Erwinnia carotovora

Alternaria iridicola
Ascochyta iridis
Didymellina macrospora
Mycosphaerella
Phyllosticta iridis

Botrytis cinerarea
Glomerella cingulata

Rots

Botryotinia convoluta
Fusarium oxysporum f. sp. gladioli
Pellicularia rolfsii
Sclerotinia sclerotiorum
Mystrosporium adustum
Penicillium

Puccinia iridis
Puccinia sessilis

Iris Mosaic Virus

Tobacco Ringspot Virus

Other Problems

Hollow centers -- Rhizomatous Irises dies out in the center if not divided every few years.

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