Eur. J. Entomol. 101 (4): 697-699, 2004 | DOI: 10.14411/eje.2004.092
Attraction of larvae of the armyworm Spodoptera litura (Lepidoptera: Noctuidae) to coloured surfaces
- 1 Department of Zoology, Delhi University, Delhi 110007, India; e-mail: singhak@vsnl.net
- 2 1675, Blackfoot Drive, Fremont, CA-94539, USA; e-mail: saxenak@hotmail.com
Attraction of first instar larvae of Spodoptera litura to different colours was studied to determine those that could be used as effective visual attractants for trapping the larvae during dispersal. The larvae were presented with cones of coloured paper. Each cone was placed in the center of a 15-cm Petri dish around the edge of which the larvae were released. Percentage of larvae arriving at the cone was recorded at 5-min intervals over a 15-min period. Differences in the percentages reflected differences in larval attraction to the different colours. The larvae were highly attracted to Foliage Green, Green Bice and Cadmium Yellow. The larvae arrived at the Scarlet Red, Ultramarine Blue, Gray, Orange, White and Black cones in percentages that were almost equal, but lower than at the Foliage Green, Green Bice and Cadmium Yellow cones. Arrival of larvae at the coloured cones increased with time, but their relative preference for different colours remained the same. This study shows that green and yellow can be used as visual attractants in Spodoptera litura larval traps.
Keywords: Armyworm, Spodoptera litura, visual attraction of larvae, colour
Received: October 29, 2003; Revised: May 4, 2004; Accepted: August 30, 2004; Published: December 20, 2004 Show citation
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