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Varietal susceptibility (Woolly aphid)

Apple varieties vary somewhat in their susceptibility to woolly aphid (e.g. Bramley is more susceptible than Cox) but commercially-grown apple varieties are not resistant. The relative susceptibility of varieties has not been characterised adequately. …

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Distribution (Woolly aphid)

Common and widespread in the UK. Woolly aphid originated in the eastern part of North America and was first noticed in Britain in 1787. It now occurs in all countries where apples are grown having been distributed on nursery …

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Damage (Woolly aphid)

The colonies occur on bark and aphids do not infest the foliage or fruits directly. Galls often form on the branches at the point where aphids have fed. The galls often split open allowing entry for diseases such as canker or Gloeosporium sp. The main …

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Monitoring (Woolly aphid)

Woolly aphid colonies are readily visible and visual inspection of the orchard is the main monitoring method. The aphid is collected by beating and this can indicate when low populations are present which have otherwise been missed. A sample of at least …

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Chemical control (Woolly aphid)

Attacks of woolly aphid tend to be sporadic and it is important to watch for sign of infestation moving onto young shoots in June (see ‘ Monitoring ’) and treat only when necessary. A high volume spray of an approved insecticide should be applied in …

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The Arable Group Limited

Incorporated on 12 September 1923 as The Norfolk Agricultural Station, The Arable Group Limited is a company limited by guarantee that is a registered charity charged with conducting operations to meet its charitable objectives . A Board of Directors are …

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