Wednesday, September 9, 2009

Earwigs - UPDATE 9/9/2009

Earwig damage to developing grapevine shoots (EL-12).
This week some earwig damage has been seen. Interestingly, as in previous years observations, the variety Merlot seems to attract the most serious damage. We are not sure why this is the case but you will often see much more leaves eaten and significant damage in Merlot than other varieties.

Most of the time earwigs do not need to be actively controlled since healthy plants will outgrow small amounts of earwig damage. While the damage can look serious, unless the inflorescence(future bunch)is eaten away, the earwigs are not affecting your crop.

Later in the season earwigs are a predator for Light Brown Apple Moth caterpillars (LBAM).

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