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1 March 2012 Description and Differentiation of the Four Larval Instars of Acanthoscelides macrophthalmus (Coleoptera: Chrysomelidae: Bruchinae)
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Abstract
Bionomic data usually hold the key for understanding the life history of the target insect species. Here, we provide morphological characteristics of different larval instars of Acanthoscelides macrophthalmus (Schaeffer), a leucaena bruchine beetle species that is a potential biocontrol agent for the notoriously invasive plant Leucaena leucocephala. The scanning electron micrographs of the head capsule, antenna, clypeolabrum, maxilla, labium, leg, spiracle, and anus of the larval stage of A. macrophthalmus also are provided for the first time for this species, with most of the traits reflecting the taxonomic placement of A. macrophthalmus in the genus Acanthoscelides. Successive instars are determined accurately by using a model of the distribution of the width of the larval head capsule. Therefore, the data generated from this study represent baseline information for further biological control programs involving A. macrophthalmus.
© 2012 Entomological Society of America
Li-Hsin Wu, Chiao-Ping Wang and Wen-Jer Wu "Description and Differentiation of the Four Larval Instars of Acanthoscelides macrophthalmus (Coleoptera: Chrysomelidae: Bruchinae)," Annals of the Entomological Society of America 105(2), (1 March 2012). https://doi.org/10.1603/AN11129
Received: 22 July 2011; Accepted: 1 November 2011; Published: 1 March 2012
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