Brassolis isthmia (Lepidoptera: Nymphalidae) in peach palm and coconut palm in Costa Rica.

Authors

  • Ramón G. Mexzón Universidad de Costa Rica, Escuela de Agronomía, Museo de Insectos

DOI:

https://doi.org/10.15517/am.v22i1.11834

Keywords:

Butterfly life cycle, Brassolinae, Bactris gasipaes, Cocos nucifera.

Abstract

The life

cycle of Brassolis isthmia was studied under field and

laboratory conditions in Guapiles, Limon, Costa Rica. This

study was carried out between September and November,

1994, during an insect outbreak in a peach palm plantation.

During the following years were conducted observations of

the butterfly feeding activities on coconut palms, in several

localities of the Caribbean slopes too. Several hundred eggs

and larvae in the first instar were collected and placed in

groups of ten individuals, and fed with pieces of peach palm

leaves of 30 x 80 mm. The number of larvae necessary to

cause defoliations of 5 and 20% was calculated for each

larval developmental stage. Average development took 159

days, distributed as follows: egg 20, larval 114, pupal 20, and

adult 5 days. The larvae are gregarious, feed during the night

and remain during the day in nests constructed with debris of

dry leaves and silk. The consumption rate during the larval

stage was of 820.62 cmÇ; the seventh instar accounts for

72.8% of this.

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How to Cite

Mexzón, R. G. (2011). Brassolis isthmia (Lepidoptera: Nymphalidae) in peach palm and coconut palm in Costa Rica. Agronomía Mesoamericana, 22(1), 149–155. https://doi.org/10.15517/am.v22i1.11834