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How to Manage PestsUC Pest Management Guidelines
DESCRIPTION OF THE PESTEuropean fruit lecanium, also known as the brown apricot scale, occurs throughout the Central Valley, but is rarely a problem. The adult female's domed shell is shiny brown, about 0.4 inch in diameter. Eggs are laid in spring and hatch from May to July. The young develop through the remainder of the season and overwinter on twigs and small branches as partly grown crawlers. There is one generation each year. DAMAGEThe chief injury is the production of honeydew that, in large amounts, can damage leaves and fruit. Sooty mold growing in the honeydew can cause blackened areas on leaves and fruit. MANAGEMENTBiological control is frequently effective; if treatment is needed, oil applied during dormancy or delayed dormancy is an effective way to reduce populations of this pest and the least disruptive of natural enemies. Increased populations of this scale may appear when dormant sprays are omitted.
Biological Control
Organically Acceptable
Methods Monitoring and Treatment Decisions To determine if a dormant or delayed dormant treatment is warranted, see DORMANT SPUR SAMPLING. Record results on a monitoring form . Look for parasitized scale during the summer by lifting up scale covers as well as examining the covers for exit holes. If a large number of scales are parasitized, treatment may not be needed.
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UC IPM Pest Management Guidelines: Prune |
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