Biology of Cerotoma arcuatus (Coleoptera: Chrysomelidae) and Field Validation of a Laboratory Model for Temperature Requirements

Abstract

Cerotoma arcuatus Olivier is a polyphagous pest of legumes [soybean, Glycine max (L.); dry beans, Phaseolus vulgaris (L.); and cowpeas, Vigna unguiculata (L.)], all of which are considered important protein sources for humans and domestic animals. Studies on the biology and temperature requirements of C. arcuatus were made under laboratory and field (cage) conditions. In the laboratory, insects were reared on soybean plants in incubators held at 18, 20, 22, 25, 28, 30, or 32 degrees C, 70 +/- 10% RH, and a photoperiod of 14:10 (L:D) h. A degree-days (DD) model developed based on the incubator data were validated in the field based on air and soil temperatures. The duration of the egg, larva-to-adult, and egg-to-adult period was inversely correlated with the temperature within the range of 18-32 degrees C, with the highest viability found from 20 to 30 degrees C. The temperature threshold for development and the thermal constant for the egg phase and the larva-to-adult periods were 13.6 degrees C and 106.7 DD, 8.3 degrees C and 399.4 DD, and 10.7 degrees C and 489.0 DD, respectively. The DD model for the egg-to-adult period, calculated using constant temperatures in the laboratory, was found to be valid for populations of C. arcuatus in the field, based on the fluctuating air and soil temperatures, although air temperatures provided more precise predictions. These data provide support for the rational control of this pest through population predictions based on their temperature requirements.

Modelling Effects of Temperature and Feeding Level on the Life Cycle of the Midge Chironomus Riparius: An Energy-Based Modelling Approach

“…In our study, there was no need of the Arrhenius equation to fit the data. Other authors came to comparable conclusions with coleopteran invertebrates (Nava & Parra, 2003). They showed that, in the range 18-32°C, the duration of the instars was inversely proportional to the temperature.…”

Biology and thermal requirements of Utetheisa ornatrix (L.) (Lepidoptera: Arctiidae) reared on artificial diet

“…The crotalaria is used for the green manure and cover crop (Rosa et al 2004;Castro et al 2005) as an controlling nematode agent and as a fiber for the tobacco industry (Nogueira et al 1992). The definition of the pest thermal requirements has helped the pest management programs to predict the pest occurrence (Nava and Parra 2003) and to mass-rear the natural enemies for the applied biological control programs . In this study on the biology of U. ornatrix reared on the artificial diet in laboratory the thermal requirements for each insect's development stages in the laboratory were determiner.…”

Exigências térmicas, estimativa do número de gerações de Stenoma catenifer e comprovação do modelo em campo

“…A previsão de ocorrência da praga, com base nas exigências térmicas, pode melhorar a eficiência de controle. A utilização de modelos de graus-dia de laboratório tem auxiliado os programas de manejo (Higley et al, 1986;Ávila et al, 2002;Nava & Parra, 2003), e tem permitido conhecer a dinâmica populacional de pragas, determinar com mais eficiência a época de amostragem e definir o número de gerações delas.…”