Scale are tiny sap sucking insects with protective coverings that can be found attached to plant leaves and stems.
To get rid of scale insects:
Scale insects can be difficult to get rid of but ORGANIC SUPER SPRAYING OIL is most effective, killing scale through suffocation. However, do not spray in the middle of the day or in strong sunlight or high temperature as this can cause burning of the plant. It is best to apply to the crawling and young stages of scale insect.
Once control has been achieved SPECTRUM or SUPER SPECTRUM are a good option for prevention and control of scale and the mould that often accompanies them. They can also be applied before (at least one day) application of ORGANIC SUPER SPRAYING OIL.
Scale are sap sucking insects that have protective coverings. The protective coverings can be hard and waxy to soft and foam-like. The shield like protective cover or frothy covering can make it difficult to identify them as insects. Scales are commonly brown, black, grey or white. See the gallery for some examples.
Scale insects fix themselves to leaves and stems and suck sap. There waste products are a sweet honeydew that ants and wasps will feed on readily. The sticky honeydew will also encourage moulds such as sooty mould. It may be difficult to see the scale if they are covered by the mould. Infested leaves usually turn yellow. Some scale live beneath bark and are not easily seen.
There are many species of scale insect in the family Coccoidea. In New Zealand common pest species include: