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Guava moth is a small, black and white speckled, inconspicuous moth with a 15mm wingspan. The moth lays its eggs on the fruit surface, and the caterpillar burrows in the fruit. The caterpillar is pinkish and grows to 5-7mm in length.
Guava moth lays eggs in a large range of fruit and nuts throughout the year, including citrus, loquat, plums, peaches, pears, apples, macadamia, feijoa and guava. From the outside fruit has circular brown patches and excreta (frass) extrudes from infested fruit and nuts.
Feeding by the caterpillar leaves rotting, brown patches, excreta and mould inside the fruit, making the fruit inedible and causing early fruit drop before fruit is fully ripe.