Influence of different host plant cultivars on nutritional indices of Plutella xylostella (Lepidoptera: Plutellidae)

Kianpour, Roja; Fathipour, Yaghoub; Karimzadeh, Javad; Hosseininaveh, Vahid

doi:10.48311/jcp.2014.1116

Influence of different host plant cultivars on nutritional indices of Plutella xylostella (Lepidoptera: Plutellidae)

10.48311/jcp.2014.1116

Volume 3, Issue 1
March 2014

Pages 43-49

Authors

R. Kianpour ¹

Y. Fathipour ¹

J. Karimzadeh ²

V. Hosseininaveh ³

¹ Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box: 14115-336, Tehran, Iran.

² Isfahan Research Centre for Agriculture and Natural Resources, Isfahan, Iran.

³ Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.

Abstract

The diamondback moth, Plutella xylostella (L.) is a serious and economically important pest of cruciferous crops worldwide. The nutritional indices of this pest on four host plants including two canola (SLM₀₄₆ and RGS₀₀₃) and two cabbage cultivars (Green-Cornet and Glob-Master) were determined under laboratory conditions (25 ± 0.5 °C, 65 ± 5% RH and 16: 8 L: D h). The highest relative consumption rate (RCR) and relative growth rate (RGR) were recorded on RGS₀₀₃ (95.68 ± 14.52 mg/mg/day) and SLM₀₄₆(0.382 ± 0.041 mg/mg/day), respectively. The efficiency of the conversion of ingested food (ECI) and efficiency of conversion of digested food (ECD) were significantly higher on SLM₀₄₆ (2.298 ± 0.646 and 2.471 ± 0.719%, respectively). However, there was no significant difference among cultivars regarding approximate digestibility (AD) index. The highest feeding performance of the larvae of P. xylostella was found on SLM₀₄₆. The nutritional indices are appropriate tools in host plant resistance evaluation and they also could provide profound understanding of the behavioral and physiological bases of insect-host plant interactions.

Keywords

nutritional indices

canola

cabbage

Plutella xylostella