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Botryosphaeria Canker
The fungus Botryosphaeria can cause a branch dieback on many woody ornamentals. Cankers girdle and kill twigs and branches of species such as horsechestnut, redbud, dogwood, beech, walnut, tulip poplar, sweetgum, crabapple, pine, oak, rhododendron, azalea, rose, willow, elm, and yew. Small black fungal fruiting structures which contain fungal spores develop in the canker.
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Cottony Camellia Scale
Cottony camellia scale is a soft scale that feeds on camellia, holly, yew, euonymus, sweetbox, and maple.
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Holly Leaf Spot
The fungi Coniothyrium ilicinum and Phacidium species are two of several that regularly cause leaf spots on holly (Ilex) in…
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Holly Leafminer
Ornamental plantings of holly in Pennsylvania are often damaged by leafmining pests. The native holly leafminer only feeds on the foliage of American holly.
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Indian Wax Scale
Indian wax scale insects, Ceroplastes ceriferus, are tiny, brownish-purple females with microscopic legs and a thick covering of sticky, white wax.
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Japanese Maple Scale
The Japanese maple scale is a recently detected pest of a wide range of woody host plants in Pennsylvania.
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Phytophthora Root Rot and Crown Dieback
Fungus-like organisms belonging to the genus Phytophthora are soil- or plant-borne and all are plant pathogens.
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Southern Red Mite
The female adult is about 0.38 mm long and resembles a small spider.
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White Prunicola Scale
What was formerly considered to be a single species of scale known as the white peach scale, has been determined to actually involve two species, one commonly known as the white peach scale, Pseudaulacaspis pentagona, and the other, Pseudaulacaspis prunicola, with the suggested common name of white prunicola scale (WPS). The WPS is the species found on Long Island, whereas white peach scale is more southern in its geographic distribution.