Field Identification
The blue-green citrus root weevil (little leaf notcher) whose adults notch leaf margins and whose larvae feed on small roots, contributing to decline complexes—often discussed alongside other citrus weevils but distinct from Diaprepes.
Adult is metallic blue-green to gray with a long snout; feeding notches leave scalloped leaf edges. Larvae are white legless grubs in soil and mulch layers.
How to Deal With It
Organic Control Methods
Entomopathogenic nematodes (Heterorhabditis bacteriophora, Steinernema riobrave) applied under irrigation target soil larvae; molasses-based bait sprays plus pathogens are used in some organic citrus programs—follow local guidance.
Ants and ground beetles scavenge eggs and young larvae; fungal epizootics after wet cycles.
Maintain mulch depth that favors nematodes but avoid trunk contact; remove excessive weed hosts; proper irrigation to limit stressed, attractive flush.
Shake adults onto sheets for manual removal on small trees; band trunks with sticky barriers where ants are not protected species of concern.
Inspect nursery stock; monitor notching on new flush; coordinate with biological control releases in groves.
Let Nature Handle It
Natural Enemies
- Heterorhabditis bacteriophora
- Steinernema riobrave
- Ground beetles
Threat Map