A dynamic model of water gain and loss in larval Mexican bean beetle

Abstract

Abstract. Quantitative effects of temperature, vapour pressure deficit, host, and larval body size were experimentally determined. A simulation model for dynamic water balance in the Mexican bean beetle, Epilachna varivestis Mulsant, is presented and parameters are estimated from laboratory data for water gain/loss equations. The model is based on water loss through the cuticle, spiracles and frass, and water gain through ingestion.

A dynamic model of larval Mexican bean beetle survival as a function of body water balance

“…A model for water balance in larval Mexican bean beetle has recently been proposed (Chu et al, 1992), but not tested under variable conditions. The purposes of this paper are to present quantitative information relating larval survival to body water content, and to validate this survival model as well as the underlying water balance model of Chu et al (1992). (20-27"C, 50-70 r.h.) with an excess of lima bean foliage at all times.…”