Temperature‐dependent development of diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae) on two brassicaceous host plants

Abstract

The effect of temperature on the development of the Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae), was evaluated at eight constant temperatures (10, 15, 20, 25, 28, 30, 32.5 and 35°C), with relative humidity of 65% and a photoperiod of 14:10 (L:D) hours on two host plants, cauliflower, Brassica oleracea var. botrytis and cabbage, Brassica oleracea var. capitata. The low temperature threshold was estimated to be 7.06°C and 7.84°C and the thermal constant was 263.74 and 261.58 degree‐days for P. xylostella on cauliflower and cabbage, respectively, using the linear model. Data were fitted to various nonlinear temperature‐dependent models, and the low and high temperature thresholds, as well as the optimum temperature for development, has been estimated. Criteria of choice from the literature were used to evaluate models and to select the most suitable equation for P. xylostella development on each host plant. Conclusively, linear and Briere‐2 models are recommended for the description of temperature‐dependent development of P. xylostella on two host plants.

Effects of Temperature and Humidity on Emergence Dynamics of Plutella xylostella (Lepidoptera: Plutellidae)

“…The observed declines in emergence rates at the lowest and highest temperatures in this study are consistent with the observations of Li et al (2013). Similar results were observed in Plutella xylostella by Golizadeh et al (2007) who studied its temperature-dependent development on cabbage, and also found that pupal development times decreased with increasing temperature.…”

Biology and nutrition of Spodoptera frugiperda (Lepidoptera: Noctuidae) fed on different food sources

“…In this discussion, it is certain that the amount and quality of available food exert a direct influence on host preference and affect the rate of growth, development time, body weight, and survival of lepidopterans, including S. frugiperda (Nation, 2002;Golizadeh et al, 2009). Therefore, in order to analyze the factors that affect the development of insects, it is necessary to know the parameters that help establish nutritional comparisons between different hosts (Scriber and Slansky, 1981).…”

Defence mechanisms of Brassicaceae: implications for plant-insect interactions and potential for integrated pest management. A review

“…3) is a highly mobile insect, and is considered as the most damaging insect pest of Brassica crops worldwide. With an estimated control cost of nearly US$ 1 billion annually (Talekar and Shelton, 1993;Pivnick et al, 1994;Sarfraz et al, 2006;Golizadeh et al, 2007;Shelton et al, 2008), it has been the greatest threat to Brassica production in many regions of the world, with crop loss of 90% in some cases (Verkerk and Wright, 1996;Charleston and Kfir, 2000). The diamondback moth was first noticed as a pest in South Africa in the early 1900s (Charleston and Kfir, 2000).…”