Controlling Scale Insects
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| Scale insects on the underside of a leaf. |
Different species of scale insects attack various kinds of fruits in all parts of the country. Branches, twigs, and leaf undersides are covered with numerous small bumps. These may be flattened and brown, or thick, white, and covered with a waxy or woolly substance. Leaves on infested plants turn yellow and the overall vigor of the tree declines. Severely infested plants may die within several seasons. Mature females feed, lay eggs, and raise families under their protective shells. Eggs hatch into crawlers that feed by sucking out the plant's juices. They then begin to produce a scale over themselves and lose their legs. There may be several generations per year.
Control
- Insecticidal soap or neem oil are effective. When spraying, be sure to cover leaf undersides. Products to consider include Insect Control Spray and the Botani-Wipes.
- Spray horticultural oil at dormant season rates in early spring before bud break on deciduous plants. Use horticultural oil at reduced, summer rates on evergreens. Follow label directions carefully.
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