Host Suitability for Crapemyrtle Bark Scale (Acanthococcus lagerstroemiae) Differed Significantly among Crapemyrtle...

Area of Science:

• Horticultural Entomology
• Plant Pathology
• Invasive Species Management

Background:

• Crapemyrtle bark scale (CMBS), an invasive insect, has spread widely in the US since 2004.
• CMBS infestations negatively impact ornamental plants and crop yields.
• Identifying CMBS hosts is crucial for risk assessment and management.

Purpose of the Study:

• To confirm hosts of crapemyrtle bark scale (CMBS).
• To evaluate the susceptibility of six Lagerstroemia species and California loosestrife to CMBS.
• To provide data for developing CMBS-resistant cultivars.

Main Methods:

• A 25-week host confirmation test was conducted.
• Six Lagerstroemia species and California loosestrife were exposed to CMBS.
• Statistical analysis (ANOVA) was used to compare CMBS populations.

Main Results:

• All tested plants were confirmed as hosts for CMBS.
• Lagerstroemia limii showed the highest average number of female CMBS (576 ± 25).
• Lagerstroemia speciosa exhibited significantly fewer females (57 ± 15) and males compared to other species.

Conclusions:

• Lagerstroemia species vary in their suitability as hosts for CMBS.
• Lagerstroemia speciosa demonstrates low suitability for CMBS infestation.
• Lagerstroemia speciosa can be a valuable genetic resource for developing CMBS-resistant ornamental plants.