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Aceitabilidade alimentar de Paulinia acuminata (De Geer, 1773) (Orthoptera: Pauliniidae) na Várzea da Amazônia Central

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Adis,  Joachim Ulrich
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Vieira, M. d. F., & Adis, J. U. (2002). Aceitabilidade alimentar de Paulinia acuminata (De Geer, 1773) (Orthoptera: Pauliniidae) na Várzea da Amazônia Central. Acta Amazonica, 32(2), 333-338.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-DD3C-E
Abstract
Nymphs and adults of Paulinia acuminata accepted five aquatic macrophytes out of 20 plant species offered during 12 days: Pistia stratiotes, Salvinia auriculata, S. minima, Azolla sp. and Ludwigia natans. The low survival rates obtained on Azolla sp. for adults (26%) and on L. natans for nymphs (40%) and adults (30%) indicate that these two aquatic macrophytes may represent alternative food sources. Cage experiments with P. statiotes and S. auriculata in the field resulted in 51-64% increase of fresh plant weight without P. acuminata and in 40-45% decrease, both compared to the initial plant weight, when 20 grasshoppers (nymphs and adults) were present. All these data reinforce the potential of P. acuminata as biological control agent for specific aquatic macrophytes