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Beech
Beech Scale: Formulations of acephate, azadirachtin (Ornazin 3% EC only), buprofezin, carbaryl, chlorpyrifos (Dursban 50W only), cyfluthrin, cyfluthrin and imidacloprid, deltamethrin, dinotefuran, horticultural oil, hydrophobic extract of neem oil, imidacloprid, insecticidal soap, lambda-cyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), methidathion, and thiamethoxam are labeled for crawler management. Marathon 1% G and Marathon 60 WP are labeled for use only on plants grown in containers, flats, benches, or beds.
Management Hints: Eggs are laid from late June through July. Crawlers should be managed when they are active in August. Feeding by this scale insect kills inner tissue of the bark. Severe injury occurs when a Nectria fungus enters the tree through wounds caused by this scale insect. (p. 332)
Cankerworm: Refer to comments under Ash. Naled is not labeled for cankerworm management on beech. (pp. 142, 144)
Elm Spanworm: Formulations of acephate (Turf, Tree, & Ornamental Spray only), azadirachtin, Bacillus thuringiensis, bifenthrin (Bifenthrin Pro Multi-Insecticide, Onyx Insecticide, Talstar F, Talstar Lawn & Tree Flowable, Talstar GC Flowable, Talstar Nursery Flowable, and TalstarOne Multi-Insecticide only), carbaryl, chlorpyrifos (Dursban 50W only), cryolite, cyfluthrin, cyfluthrin and imidacloprid, deltamethrin, diflubenzuron, lambda-cyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), permethrin (Astro Insecticide and Permethrin Pro only), phosmet, pyrethrins and piperonyl butoxide, tau-fluvalinate, and tebufenozide are labeled for management of this pest.
Management Hints: Apply when small larvae are active in mid- to late May. (pp. 144, 146)
Woolly Beech Aphids: Apply horticultural spray oil as a dormant treatment. Formulations of abamectin, acephate, acetamiprid, azadirachtin, Beauveria bassiana, bifenthrin (Bifenthrin Pro Multi-Insecticide, Onyx Insecticide, Talstar F, Talstar Lawn & Tree Flowable, Talstar GC Flowable, Talstar Nursery Flowable, and TalstarOne Multi-Insecticide only), chlorpyrifos (Dursban 50W only), cyfluthrin, cyfluthrin and imidacloprid, deltamethrin, dinotefuran, disulfoton, fenpropathrin, horticultural oil, hydrophobic extract of neem oil, imidacloprid, lambda-cyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), malathion, oxydemetonmethyl, permethrin (Astro Insecticide and Permethrin Pro only), pymetrozine, pyrethrins and piperonyl butoxide, pyriproxyfen, tau-fluvalinate, and thiamethoxam are labeled to manage aphids. Marathon 1% G and Marathon 60 WP are labeled for use only on plants grown in containers, flats, benches, or beds.
Management Hints: Select and apply horticultural spray oil according to label directions. Aphids should be managed during late May through mid-June before populations increase on host plants. (p. 296)
Yellownecked Caterpillar: Formulations of azadirachtin, bifenthrin (Bifenthrin Pro Multi-Insecticide, Onyx Insecticide, Talstar F, Talstar Lawn & Tree Flowable, Talstar GC Flowable, Talstar Nursery Flowable, and TalstarOne Multi-Insecticide only), carbaryl, chlorpyrifos (Dursban 50W only), cryolite, cyfluthrin, cyfluthrin and imidacloprid, deltamethrin, lambda-cyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), permethrin (Astro Insecticide and Permethrin Pro only), pyrethrins and piperonyl butoxide, spinosad, and tau-fluvalinate are labeled for management of this pest.
Management Hints: Applications may be made from July through mid-September when larvae are present and infestations are severe. Buds are usually set on host plants late in the growing season so that lowering population levels will be more aesthetic in nature than for plant health care reasons. Remove and destroy colonies of young larvae when observed on the foliage of trees. (p. 154)