Common Name: Hail

Type: Plant Damage

Major Identifying Features: Pellets of frozen hail that fall in showers from cumulonimbus clouds

Life Cycle: Not considered as a pest, rare in California

Pest Rating: Not considered as a pest

Management Rating: Very difficult

Host/Season/Outbreak Information: Rare in California, winter or early spring

Damage Information: Hailstones tatter, tear, and pit leaves and scar fruit. Sometimes it also causes elliptical wounds in bark or breaks twigs, serious damage can kill and girdle branches, wounds occur on the upper side of plants, fireblight outbreaks can follow hail damage, hail damage can be seen on several plants after a storm whereas pathogen damage only occurs on certain plant species

Management Options: Prune out wood that is seriously damaged, cultural care for injured plants, especially proper irrigation


Dreistadt, Steve H., and Jack Kelly Clark. Pests of Landscape Trees and Shrubs: An Integrated Pest Management Guide. Oakland, CA: U of California, Agriculture and Natural Resources, 2016. Print.


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