Pear slug
(Caliroa cerasi)

Overview

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The species Caliroa cerasi is commonly known as the Pear Slug. This pest commonly infests crops such as apples, cherries and pears. Larval feeding can lead to defoliation, mottling and loss of leaf material. Severe damage will lead to the leaves turning reddish-brown, giving the tree a burnt appearance and affecting the quality of the fruit.

Main description

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The adult of the pear slug results in the sawfly, which can reach 5 mm in length and is shiny black. The larvae are black, approximately 10-12 mm in length and become a yellowish- green colour at maturity.

Scouting

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When scouting for the larvae of the pear slug, look for the larvae and mottled leaves, as they are readily visible. Scouting should take place weekly and start mid-end June to mid-July, when the populations can become established in the field.