KAC Citrus Entomology
University of California
KAC Citrus Entomology

Management

Biological Control: There are a number of native Eulophid parasitoid wasps that attack citrus peelminer, providing low levels of control.  They tend to  attack the late instar leafminer larvae, and so they allow mining damage to occur.  Since citrus leafminer and citrus peelminer share many of the same parasitoids, it is thought that as time goes on biological control of both moth species will improve.

Cultural Control: Pruning out suckers will help somewhat to reduce citrus peelminer. 

Insecticidal Control: Insecticide control of citrus peelminer is recommended only for susceptible varieties of citrus that have had chronic problems with citrus peelminer.  These include all varieties of pummelos and grapefruit and TI, Atwood, Barnfield, and Fukumoto navel oranges.  Treatments are only 50% effective in reducing mining, because the moths deposit the eggs on rapidly growing fruit, deep inside the interior of the tree, where it is difficult to achieve good coverage.  If treatments are applied, they should be completed during the 3rd and 4th flight for pummelos and grapefruit, and during the 4th and 5th flight for the oranges.  These timings should be based on degree day calculations.  If you wait till you see mines to begin spraying, the damage is already done.  See UCIPM Guidelines for Citrus: Citrus Peelminer for recommendations on what to spray.

pminergenerations
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