A linear model and three nonlinear models (Logan type III, Lactin and Brie` re) were applied to Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) at constant temperatures and validated under diel temperature variation, and field conditions. Complete development from egg to adult, with >80 survivorship, occurred at nine constant temperatures between 15 and 32 degrees C. Total developmental time decreased from a maximum at 15 degrees C (68.48 days) to a minimum at 30 degrees C (18.69 days) and then increased at 32 degrees C (23.44 days). Optimal survival and the highest developmental rate occurred within the range of 27- 30 degrees C. The adjusted determination coefficients were high for linear and nonlinear models (>0.89). Field validation showed high levels of accuracy in all models (>= 93.4). These valid mathematical models contribute to optimal application, field management, and mass rearing of M. pygmaeus for its applicability to biological control.
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