California Agriculture
California Agriculture
California Agriculture
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Navel orangeworm: Summer infestations of codling moth on walnuts favorable to navel orangeworm

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Authors

A. E. Michelbacher, University of California
Norman Ross, University of California

Publication Information

California Agriculture 11(7):12-12.

Published July 01, 1957

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Abstract

Summer walnuts infested with the codling moth furnish breeding locations for the navel orangeworm and—as a result—a population of moths is present in the orchard when the husks begin to crack as the harvest period approaches. The caterpillars of the navel orangeworm are unable to penetrate the green husks of sound walnuts so they are not subject to infestation until maturity is reached and the husks split. After this stage of nut development is reached, the crop is open to attack until it is harvested. As a result the amount of infestation tends to increase as harvest is delayed.

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Navel orangeworm: Summer infestations of codling moth on walnuts favorable to navel orangeworm

A. E. Michelbacher, Norman Ross
Webmaster Email: wsuckow@ucanr.edu

Navel orangeworm: Summer infestations of codling moth on walnuts favorable to navel orangeworm

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

A. E. Michelbacher, University of California
Norman Ross, University of California

Publication Information

California Agriculture 11(7):12-12.

Published July 01, 1957

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

Summer walnuts infested with the codling moth furnish breeding locations for the navel orangeworm and—as a result—a population of moths is present in the orchard when the husks begin to crack as the harvest period approaches. The caterpillars of the navel orangeworm are unable to penetrate the green husks of sound walnuts so they are not subject to infestation until maturity is reached and the husks split. After this stage of nut development is reached, the crop is open to attack until it is harvested. As a result the amount of infestation tends to increase as harvest is delayed.

Full text

Full text is available in PDF.

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