KAC Citrus Entomology
University of California
KAC Citrus Entomology

Management

Parasitic Wasp Cirrospilus coachellae
Parasitic Wasp Cirrospilus coachellae

Young trees need protection from leaf damage
Young trees need protection from leaf damage

Biological Control: There are a number of native Eulophid parasitoid wasps that attack citrus leafminer, providing variable levels of control.  They tend to  attack the late instar leafminer larvae, and so they allow mining damage to occur.

Cultural Control: Orchard activities that stimulate flush growth will provide attractive flush and promote leafminer populations.

Insecticidal Control: Insecticide control of citrus leafminer is most important in nurseries and new plantings of citrus.  See the UC IPM Guidelines for Citrus: Citrus Leafminer for more details

Mature trees: In most cases, insecticide treatment is not needed.  Yield is usually not affected by this type of leaf damage.

Young Citrus (< 4 yrs old): Systemic treatments of imidacloprid 1-2 times per year are the most common treatment for young citrus.

Nursery Citrus:
Nursery citrus can be under a great amount of pressure from citrus leafminer.  Nurseries must protect the citrus from infestation in order to ship trees to other areas of the state and to maximize the growth of seedlings and newly grafted plants.  Nurseries do not have the same registrations of insecticides as commercial citrus. Treatments with systemic neonicotinoids and frequent treatments (every 2-4) weeks with foliar insecticides provide good protection.  Be sure to rotate between different chemical classes to avoid selecting for resistance to any one insecticide.  See Table of citrus pesticide groups for more information about chemical classes. 

Webmaster Email: eegraftoncardwell@ucanr.edu