Master Gardener Decision Support Guide

Woody Ornamentals

Gardenia

Short cuts for Gardenia Answers

The following problems are listed for this plant and considered when developing the diagnostic key. If the caller provides accurate answers to the questions, the ones that are linked should key out to that specific problem. The unlinked problems are expected to key to the point where the caller is asked to submit a sample. These samples will often require diagnostic procedures such as soil testing, pathogen culture, Elisa or other test beyond the resources of the average Master Gardener Volunteer or County Extension Agent.

Insects:

Scale:
Ceroplastes cirripediformis (carnacle scale)
Chrysomphalus dictyospermi (dictyospermum scale)
Duplaspidiotus claviger (camellia mining scale)
Fiorinia theae (tea scale)
Lindingaspis rossi (a subtropical armoured scale)
Saissetia coffeae (hemispherical scale)

Other:
Asynonychus godmani (Fuller rose beetle)
Parabemisia myrica (Japanese bayberry whitefly)
Dialeurodes citrifolii (cloudywinged whitefly)
Planococcus citri (citrus mealybug)
Pseudococcus lonispininus (longtailed mealybug)
? (Spider mite)
? (Aphids)

Disease:
Alternaria sp (Leaf spot)
Erysiphe polygoni (powdery mildew)
Meloidognye (root knot nematode)
Diaporthe gardeniae (Canker, dieback, gall)
Phytophthora sp. (Phytophthora Root Rot)
Sooty mold

Environmental:
Winter injury

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Designed by David Goforth on December 30, 1997.
Contents modified on February 17, 1998.
Contents checked on February 17, 1998.