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Laurel, Portuguese (Prunus)-Carnation tortrix Cacoecimorpha pronubana Pest description and damage Portuguese laurel (Prunus lusitanica) is sometimes infested with the larvae of the carnation tortrix. This is a small (wingspan 0.5 to 0.9 inch), bell-shaped ...

Laurel, Portuguese (Prunus)-Peachtree borer Synanthedon exitiosa Pest description and damage Peach tree borer is native to North America and common in the Pacific Northwest. The adult is a metallic blue-black, clearwing moth. The male moth with a 1-inch w ...

Lilac (Syringa)-Ash borer Lilac and ash borers (Podosesia syringae) Pest description and damage The lilac borer, also called the ash borer, is a clearwing moth that attacks lilac, privet and other members of the olive family. The adult moth ranges from 1 ...

Lilac (Syringa)-Lilac leafminer Gracillaria syringella Pest description and damage The adult insect is a golden yellow moth about 0.5 inch in length. The larvae are small, white to pale yellow or greenish caterpillars, 0.125 to 0.25 inch in length. The la ...

Lilac (Syringa)-Oystershell scale Lepidosaphes ulmi Pest description and damage Scale insects are small (less than 0.125 inch in length) soft insects that live beneath waxy scales. These insects are often identified by the shape and size of their scales, ...

Lily (Lilium)-Aphid Foxglove aphid (Aulacorthum solani) Green peach aphid (Myzus persicae) Melon aphid (Aphis gossypii) Pest description and damage Several aphid species are pests of lilies. Aphids tend to be small (0.0625 to 0.125 inch in length), oval t ...

Lily (Lilium)-Lily leaf beetle Lilioceris lilii Pest description and damage This bright red leaf beetle is new to the PNW and is currently only known from a few locations in Bellevue, Washington. The adult beetles are 0.4 to 0.5 inch in length, shiny as t ...

Linden (Tilia)-Aphid Includes linden aphid (Eucallipterus tiliae) Pest description and damage The linden aphid is about 0.07 to 0.12 inch in length and green with black lateral stripes. The aphids feed in colonies on the undersides of leaves. Feeding dama ...

Linden (Tilia)-Fall webworm Hyphantria cunea Pest description and damage These gregarious caterpillars spin web-like tents in branch tips of deciduous trees including apple, cherry, peach, pecan, English walnut, black walnut, ash, boxelder, birch, chokech ...

Linden (Tilia)-Lecanium scale Includes Parthenolecanium corni Pest description and damage Scale insects are small (less than 0.125 inch in length) soft insects that live beneath waxy scales. These insects are often identified by the shape and size of thei ...