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My myer lemons are covered in a brown scale, some of them 100% and others a little less. I have sprayed them with pest oil. Will the scale disappear? How often should I spray them. My neighbour has no sign of scale on his.

21 Hymes Street

The scale insects will be smothered by the pest oil and die off. They tend to dry up and drop from the tree or can be rubbed/washed off by spraying the tree with water from a hose etc. Sometimes two to three treatments may be required to kill all the scale and baby crawlers and these sprays can be up to a month apart.

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