Gardening Articles: Landscaping :: Trees, Shrubs, & Vines
Winter's Hollies (page 5 of 5)
by Michael MacCaskey
The most vexing insect pest is the holly leaf miner. Brief descriptions and controls (if applicable) for it and five other minor pests follow. Only nontoxic remedies are specified. If th grubs feed on roots. Control: Beneficial nematodes.
Holly berry midge. Minute, black fly lays eggs in the flower. Larvae tunnel into cell where seeds form, preventing berries from ripening. Primarily a pest of the American holly. Control: None.
Holly bud moth. Most common in the Pacific Northwest. Damage is caused by feeding and webbing of caterpillars in new growth. Control: Spray horticultural oil in late March.
Holly leaf miner. Larvae of a small, black fly tunnel inside leaves. Control: Spray systemic insecticide mid-May and early June.
Mites. These are tiny, spiderlike pests that live on undersides of leaves. Damaged leaves are off-color, often silvery. Southern red mite is common in the East, typically infesting I. opaca. Control: Spray insecticidal soaps or horticultural oils in early summer.
Scale. Brown soft scale is most common. Cottony camellia scale, lecanium scale and holly scale are occasionally problems. Control: Spray horticultural oil in late March.
For more information, contact the Holly Society of America, 309 Buck Street #803, Millville, NJ 08332-3819.
Michael MacCaskey is editorial director of National Gardening.
Photography by SuzanneDeJohn/National Gardening Association