Temperature-dependent development and host range of crapemyrtle bark scale, Acanthococcus lagerstroemiae (Kuwana) (Hemiptera: Eriococcidae)

Authors

  • Zinan Wang Louisiana State University, Agricultural Center, Department of Entomology, Baton Rouge, Louisiana 70803, USA
  • Yan Chen Louisiana State University, Agricultural Center, Hammond Research Station, Hammond, Louisiana 70403
  • Rodrigo Diaz Louisiana State University, Agricultural Center, Department of Entomology, Baton Rouge, Louisiana 70803, USA

Keywords:

alternative hosts, developmental time, immature development, temperature effects, no-choice test

Abstract

The crapemyrtle bark scale, Acanthococcus lagerstroemiae (Kuwana) (Hemiptera: Eriococcidae), is an invasive pest of crapemyrtles, Lagerstroemia spp. L. (Lythraceae) in the southeastern USA. Information about its temperature-dependent development and host range is limited. The objectives ofthis study were to evaluate the effects of temperature on the immature development of A. lagerstroemiae, and to determine plant species suitablefor immature development and reproduction. Developmental time and survival of eggs were evaluated at 7 constant temperatures from 17.5 to 32°C, and of nymphs at 20, 25, and 30 °C. Results suggested that 27.5 °C was the optimum temperature for egg hatching with the shortest time (10 d)and the highest hatching rate (95%). The developmental time for A. lagerstroemiae from nymph to prepupa and gravid female was 56 d and 68 d at30 °C, respectively. Five plant species besides crapemyrtle (Lagerstroemia indica × fauriei L.) were able to support the immature development andreproduction of A. lagerstroemiae under no-choice conditions, including Lawsonia inermis L., Heimia salicifolia Link, Punica granatum L., Lythrum alatum Pursh (all Lythraceae), and Callicarpa americana L. (Lamiaceae). At wk 12 from inoculation, the density of gravid females was 482 ± 92 (mean± standard error) on L. indica × fauriei, 200 ± 70 on C. americana, and < 150 on other species. Using data from developmental time and host range,integrated pest management (IPM) practitioners can implement preventive strategies for A. lagerstroemiae.

 

 

Resumen

La escama de la corteza del crespón, Acanthococcus lagerstroemiae (Kuwana) (Hemiptera: Eriococcidae), es una plaga invasiva del crespón, Lagerstroemia spp. L. (Lythraceae) en el suereste de EE. UU. Hay muy poca información sobre el desarrollo de la escama a diferentes temperaturas o sobre surango de hospederos. Los objetivos de este estudio fueron evaluar los efectos de la temperatura en el desarrollo de inmaduros de A. lagerstroemiae,y determinar las plantas capaces de sostener desarrollo de inmaduros y reproducción. El tiempo de desarrollo y sobrevivencia de huevos fueronevaluados a 7 temperaturas constantes desde 17.5 a 32 °C, y de ninfas a 20, 25, 30 °C. Los resultados sugieren que 27.5 °C es la temperatura óptimapara la eclosión de huevos debido a su corto tiempo (10 d) y alta tasa de eclosión (95%). El tiempo de desarrollo de A. lagerstroemiae de ninfa aprepupa y a hembra gestante fue 56 d y 68 d a 30 °C, respectivamente. Cinco especies de plantas adicionales al crespón (Lagerstroemiae indica × fauriei L.) pudieron sostener el desarrollo de inmaduros y reproducción de A. lagerstroemiae bajo condiciones de no-elección, incluyendo Lawsonia inermis L., Heimia salicifolia Link, Punica granatum L., Lythrum alatum Pursh (Lythraceae), y Callicarpa americana L. (Lamiaceae). En la semana 12desde la inoculación, la densidad de hembras gestantes fue 482 ± 92 (promedio y error estándar) en L. indica × fauriei, 200 ± 70 en C. americana,y < 150 en otras especies. Usando datos del tiempo desarrollo y rango de hospederos, trabajadores en (MIP) pueden implementar estrategias deprevención de A. lagerstroemiae.

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Published

2019-04-27

Issue

Vol 102, No. 1 (March 2019)

Section

Research Papers

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