Quick ID: White, waxy or cottony insects clustered on guava leaves, stems or fruit can be mealybugs. This Earth People field photograph documents mealybugs on guava in Southern California.
How to recognize mealybugs
Mealybugs are soft-bodied, segmented sap feeders commonly covered with whitish wax. Colonies can look cottony or powdery and often collect in protected areas. They can be confused with other wax-producing insects, so examine the insects and their location rather than relying only on white residue.
What damage can they cause?
High populations can slow plant growth and contribute to leaf or fruit drop. Many mealybugs produce sticky honeydew, which can support black sooty mold and attract ants.
Why ants matter
Ants are often attracted to honeydew and can interfere with predators and parasitoids that naturally suppress mealybugs. Ant activity is therefore part of the inspection—not a separate issue.
Earth People IPM approach
Determine how widespread the infestation is, preserve natural enemies outdoors and address ant pressure where appropriate. Exposed populations can sometimes be physically reduced. Horticultural oils or insecticidal soaps may be useful in appropriate situations when the label allows, but treatment should be matched to pest pressure, plant condition and weather.
Why we are not naming the species from this photo
California has many mealybug species and several look similar. The photograph supports identification as mealybugs on guava, but we do not assign a species name from appearance alone when the evidence is insufficient.
Growing guava?
See our Tropical Pink Guava tree listing for Southern California gardens.
UC IPM reference
For California identification and management guidance, see UC IPM: Mealybugs. Earth People uses UC IPM as a technical reference while our field photos and site-specific observations remain original.
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