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Varietal susceptibility (Leafhopper)

There are considerable differences in the susceptibility of apple varieties but these have not been adequately quantified. Some of the newer desert varieties seem particularly …

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Damage (Leafhopper)

Leafhoppers feed on the non-vascular leaf tissue (mesophyll cells), puncturing the cells and withdrawing the sap. This causes white speckling of the leaves visible from above and below. Damage is usually most intensive on older leaves in the centre of the …

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Recognition (Leafhopper)

Leafhoppers that occur on apple in the UK are small (mostly 3-5 mm long) slender insects, usually green or yellow in colour (though some species are brightly coloured), found mainly on the undersides of leaves associated with the speckling damage they …

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Monitoring (Leafhopper)

Leafhopper populations are best monitored by visual inspection for the characteristic speckling damage which occurs initially on older leaves in the centre of the tree, and for the leafhoppers themselves which are often present on the undersides of …

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Chemical control (Leafhopper)

A spray of an approved insecticide should be applied in summer against adults and nymphs if leaf damage starts to become unsightly and is increasing. A full approval for spirotetramat (Batavia) on apples for the control of sucking insect pests will …

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Natural enemies (Leafhopper)

Predatory insects and spiders Leafhoppers appear to have few natural enemies. They are preyed on by nabid bugs and spiders. Parasitic flies and wasps Parasitic flies and wasps are the most important natural enemies of leafhoppers. Pipunculid parasitic …

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Biological control (Leafhopper)

Biological control approaches for leafhoppers on apple have not been developed. Inundative releases of parasitic wasps that parasitise eggs have been use to effect to control other leafhopper species on other crops in other countries. However, this …

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