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Scale
Common symptoms are poor growth and dehydrated leaves. Hard scale insects can be seen on the woody and green stems. Scale numbers build up quickly in dry seasons; keep your tree well watered. As a result of a scale infestation, you may also see sooty mould fungus developing on leaves, or ants crawling up and down the stems. The ants and sooty mould will disappear once the scale is controlled.
Solution
Yates Nature's Way Organic Citrus, Vegie & Ornamental Spray
Leaf Roller Caterpillars
The Light Brown Apple Moth (Epiphyas postvittana) is the main culprit on feijoa. Leaves are rolled and stuck together with fine webbing. Leaves and the surface of fruit can be eaten.
Solution
Yates Success Ultra Insect Control - Concentrate
Mites
If leaves are yellowing, mottled or drying out and if they have fine webbing on the underside, mites will be the culprits.
Solution
Yates Nature's Way Organic Citrus, Vegie & Ornamental Spray
Guava Moth
Feijoas are commonly infested during autumn. It's often difficult to spot evidence of guava moth before fruit is harvested. Fruit may appear bruised and in later stages 1mm exit holes may be seen where the larvae have bored their way out of the fruit.
Solution
Prevent adult guava moths from laying eggs on the fruit by draping insect mesh over the tree (after flowering) and sealing it at the bottom so they can’t get in. Alternatively, you can protect the individual fruits by popping them into small organza bags, tied off at the top
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