PestHigh Severity

Asian Cycad Scale

Aulacaspis yasumatsui (Hemiptera: Diaspididae)

An exotic invasive armored scale insect that forms devastatingly dense populations on cycad plants. The scale creates white coverings that can completely coat plants, appearing like snow. Unique among scales for its ability to infest both foliage and root systems.

Peak Season: Active year-round in suitable climates, peak reproduction in warm weather
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Asian Cycad Scale infestation showing characteristic white waxy covering

Identification & Symptoms

What to Look For

Dense white scale covering that appears like snow on leaves
Multiple layers of scale insects coating plant surfaces
Up to 3,000 scales per square inch in heavy infestations
Yellow and brown discoloration of affected foliage
Stunted growth and declining plant vigor
Plant death if left untreated
Root infestations at depths up to 24 inches

Potential Damage

Extremely dense populations can kill host plants
Complete coating of medium-sized sagos within several months
Disrupts plant nutrient and water transport
Both aerial and root feeding damage
High proportion of dead and live insects create thick coating
Unusual among scales for root system infestation

Lifecycle

Females pass through three instars with development from egg to adult averaging 28 days. Females lay over 100 eggs which hatch in 8-12 days at 25°C. Most females live no longer than 75 days. Crawlers find suitable feeding spots, insert stylets, and create protective scale covering.

Professional Treatment Approach

1

Systemic insecticide injection targeting both foliar and root populations

2

Horticultural oil applications to smother scales

3

Regular monitoring for early detection

4

Quarantine measures to prevent spread

5

Professional treatment recommended due to severity

Recommended Mauget Products

Imicide

Professional-grade treatment specifically effective against asian cycad scale.

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Dinocide

Professional-grade treatment specifically effective against asian cycad scale.

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