Scale Insects On Camellia

Scale insects are not uncommon on camellia, nor are aphids, mealybugs, whitefly and spider mites; they often coexist on stressed plants. As they feed, the leaves turn yellow, often develop spots, and fall off. There can be webs and sticky exudate that soon grows black sooty mold. Start gaining control by spraying the plants thoroughly, if temperatures permit, with a horticultural oil spray. These oils are highly refined and will not burn if used as directed on the label and should be used each winter on camellias. In hot weather, use a non-oil control product made for piercing and sucking insects such as pyrethrin or neem. Spray the trunks and upper and lower leaf surfaces. This looks like a serious infestation so do consider also using a systemic insecticide to continue control this year. Keep fallen leaves raked up; water and fertilize as usual. The plants are tough; with your help, they’ll shake off the insect issues.