Quick ID: Small brown, tan or gray bumps fixed tightly to blueberry stems can be scale insects. This original Earth People field photograph documents scale insects on a blueberry plant in Southern California.
What to look for
Scale insects often settle tightly against stems, twigs, leaves or fruit and can resemble part of the plant. Depending on the scale type, an infestation may also be associated with honeydew, ants, sooty mold, reduced vigor or twig decline.
Why identification matters
“Scale” describes many insects with different biology and management. Although the insects in our photograph are brown, color alone is not enough to identify them as brown soft scale. We therefore label this image conservatively as scale insects on blueberry until species-level identification is supported.
Look for the crawler stage
Young scale nymphs—often called crawlers—are mobile before settling. Correctly identifying the scale type and its vulnerable life stage can make management more targeted than treating every visible scale the same way.
Earth People IPM approach
Inspect multiple stems and leaf surfaces, determine severity, look for crawlers and natural enemies, check for ants or honeydew and evaluate irrigation and overall plant vigor. Physical removal or labeled horticultural oils or soaps can be appropriate in some situations, but plant species, scale type, life stage and label directions matter.
UC IPM reference
For California scale identification and management information, see the UC IPM Scale Insects resources. Earth People uses UC IPM as a technical reference and cross-check while keeping our field photography and explanations original.
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