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Free keywords:
temperature; photoperiod; nymph; development; Acrididae; Cornops
Abstract:
Development of the semi-aquatic acridid Cornops aquaticum on Eichhornia crassipes (Pontederiaceae) was investigated in the laboratory. Influence of constant (12 and 27 °C) and variable (36/3 °C and 36/4.5 °C) temperatures as well as constant (24 h day) and variable (14 h day/ 10 h night) photoperiods were analysed. The highest survival of nymphs (69 %) was obtained under an extreme photoperiod (24 h day) and constant temperature (27 °C). Both temperature and photoperiod were important for the development and number of nymphal stages, indicating a synergic effect.
