Cydia splendana

Chestnut fruit moth

General

The chestnut fruit moth (Cydia splendana) is a pest of chestnut and occasionally walnut. It is widely distributed in Europe.

Life cycle and appearance of Chestnut fruit moth

The adults have a wing span of 14-22 mm, greyish white forewings, suffused with darker grey and brown, and a large submarginal ocellus, with several black dashes. The hindwings are greyish brown.

The eggs are about 0.7 x 0.6 mm and whitish when laid. Later the developing embryo is visible as a purplish-red ring. The larvae are up to 15 mm long, greyish green to yellowish with and translucent, with a yellowish brown head.

Fully developed larvae overwinter in a cocoon in the soil. They have an extended diapause and do not pupate until June or July. The adults appear 3-4 weeks later and fly form July to September. Some larvae remain in diapause for a second winter. Eggs are laid singly on leaves close to developing nuts and hatch after 10-12 days. Larvae then bore into developing chestnuts and feed there. They become fully developed in autumn.

Damage symptoms

A part of the kernel of the chestnut is destroyed and replaced by blackish frass. Heavy infestation can lead to considerable crop losses.

Get in touch with the expert

Koppert Biological Systems

Thanks for your request!

Something went wrong, please try again

Want to know more about our company and products? Get in touch with one of our experts.
We produce our products and solutions for professional growers in horticulture.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service.

Subscribe to our newsletter

Get the latest news and information about your crops directly in your mailbox

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service.
Scroll to top