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Dogwood
Calico Scale: Horticultural spray oil can be applied as a dormant treatment. Crawlers may be managed with 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. 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 oils according to label directions. Crawlers may be managed when they are active in June through early July. Repeat applications may be needed. (p. 354)
Dogwood Borer: Formulations of azadirachtin (Azatin XL Plus and Ornazin 3% EC only), bifenthrin (Onyx Insecticide only), chlorpyrifos (Dursban 50W only), and permethrin (Astro Insecticide and Permethrin Pro only) are labeled for borer management.
Management Hints: The use of sex pheromone traps will aid in determining adult flight activity. Make two applications at 7- to 10-day intervals in late May and early June. Treat trunk and lower branches, and keep trees growing vigorously. If an infestation is severe, additional applications may need to be made according to label directions in early July, early August, and early September. Place mulch around the base of trees to protect trunks from injury caused by lawn mowers and other machines. (p. 262)
Dogwood Sawfly: Formulations of acephate, azadirachtin, carbaryl, chlorpyrifos (Dursban 50W only), cyfluthrin , cyfluthrin and imidacloprid, deltamethrin, diflubenzuron, horticultural oil (larvae), imidacloprid (Merit 2, Merit 75 WP, and Merit 75 WSP only), insecticidal soap, lambda-cyhalothrin, naled, and spinosad are labeled for sawfl y management.
Management Hints: Treat infested trees when larvae are active during late June through July. Light infestations may be handpicked and destroyed. (p. 126)
Leafhoppers: Formulations of acephate, acetamiprid, 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), buprofezin, carbaryl, chlorpyrifos (Dursban 50W only), cyfluthrin, cyfluthrin and imidacloprid, deltamethrin, disulfoton, fenpropathrin, hydrophobic extract of neem oil, imidacloprid, insecticidal soap, lambda-cyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), malathion, permethrin, phosmet, pyrethrins and piperonyl butoxide, tau-fluvalinate, and thiamethoxam are labeled for leafhopper management.
Management Hints: Treat when leafhoppers are first noticed and repeat as necessary according to label directions. (pp. 414, 416, 418)
Oystershell Scale: Formulations of acephate, acetamiprid, azadirachtin (Ornazin 3% EC only), buprofezin, carbaryl, chlorpyrifos (Dursban 50W only), cyfluthrin , cyfluthrin and imidacloprid, deltamethrin, dinotefuran, horticultural oil, hydrophobic extract of neem oil, insecticidal soap, lambdacyhalothrin (Battle GC, Demand CS, Scimitar CS, Scimitar GC, and Scimitar WP only), malathion, and methidathion are labeled for crawler management.
Management Hints: Select and apply horticultural spray oils according to label directions. Crawler sprays should be applied from late May through early June. Repeat applications may be needed. Be sure to follow label directions. Prune and destroy heavily infested twigs and branches. (p. 370)