Diel Periodicity in the Production of Green Leaf Volatiles by Wild and Cultivated Host Plants of Stemborer Moths, Chilo partellus and Busseola fusca
- 600 Downloads
The volatile chemicals produced by four poaceous plant species, blue thatching grass, Hyparrhenia tamba, Napier grass, Pennisetum purpureum, sorghum, Sorghum bicolor, and maize, Zea mays, which are host plants for the lepidopterous stemborers, Chilo partellus and Busseola fusca, were collected by air entrainment and analyzed by gas chromatography. The total quantities of volatiles collected hourly, over a 9-hr period, from P. purpureum and H. tamba showed an approximately hundredfold increase in the first hour of the scotophase. Thereafter, the amount decreased rapidly to levels present during photophase. Although onset of scotophase also triggered an increase in quantities of volatiles collected from two cultivars of S. bicolor and two out of three cultivars of Z. mays, these increases were less dramatic than in the two wild grasses, being only up to 10 times as much as in the last hour of photophase. Analysis showed that up to 95% of the increase in volatiles at the onset of the scotophase was due to just four compounds, the green leaf volatiles hexanal, (E)-2-hexenal, (Z)-3-hexen-1-ol, and (Z)-3-hexen-1-yl acetate, with the latter dominating the volatile profile. Volatiles from P. purpureum were also collected at 10-min intervals for 70 min spanning the transition from light to dark. The vast increase in production of the green leaf volatiles in this species occurs in the first 10 min of the scotophase followed by a rapid decline within the next 20 min. The relevance of these results to the control of stemborers in a “push–pull” strategy is discussed.
Key WordsStemborer maize sorghum diel periodicity green leaf volatile oviposition host location
Teodora Toshova was the recipient of a Royal Society Fellowship. Rothamsted Research receives grant-aided support from the Biotechnology and Biological Research Council of the UK. The work was also supported by the UK Department for the Environment, Food, and Rural affairs (DEFRA).
- Ampofo, J. K. O. 1986. Maize stalk borer (Lepidoptera: Pyralidae) damage and plant resistance. Environ. Entomol. 15:1124–1129.Google Scholar
- Holzinger, R., Sandoval-Soto, L., Rottenberger, S., Crutzen, P. J., and Kesselmeier, J. 2000. Emissions of volatile organic compounds from Quercus ilex L. measured by proton transfer reaction mass spectrometry (PTR-MS) under different environmental conditions. J. Geophys. Res. 105:20573–20579.CrossRefGoogle Scholar
- Kfir, R. 1992. Seasonal abundance of the stemborer Chilo partellus (Lepidoptera: Pyralidae) and its parasites on summer grain crops. J. Econ. Entomol. 85:518–529.Google Scholar
- Khan, Z. R. and Pickett, J. A. 2004. The ‘push–pull’ strategy for stemborer management: A case study in exploiting biodiversity and chemical ecology, pp. 155–164, in G. M. Gurr, S. D. Wratten and M. A. Altieri (eds.). Ecological Engineering for Pest Management: Advances in Habitat Manipulation for Arthropods. CABI Publishing, Wallingford, Oxon, UK.Google Scholar
- Khan, Z. R., Pickett, J. A., Wadhams, L. J., and Muyekho, F. 2001. Habitat management strategies for the control of cereal stemborers and striga in maize in Kenya. Insect Sci. Appl. 21:375–380.Google Scholar
- Ngi-Song, A. J., Njagi, P. N. G., Torto, B., and Overholt, W. A. 2000. Identification of behaviourally active components from maize volatiles for the stemborer parasitoid Cotesia flavipes Cameron (Hymenoptera: Braconidae). Insect Sci. Appl. 20:181–189.Google Scholar
- Rebe, M., van den Berg, J., and McGeoch, M. A. 2004. Colonisation of cultivated and indigenous graminaceous host plants by Busseola fusca (Fuller) (Lepidoptera: Noctuidae) and Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) under field conditions. Afr. Entomol. 12:187–199.Google Scholar
- Seshu-Reddy, K. V. and Sum, K. O. S. 1992. Yield–infestation relationship and determination of economic injury level of the stemborer, Chilo partellus (Swinhoe) in three varieties of maize, Zea mays L. Maydica 37:371–376.Google Scholar
- van den Berg, J., van Rensburg, J. B. J., and Pringle, K. L. 1991. Comparative injuriousness of Busseola fusca (Lepidoptera: Noctuidae) and Chilo partellus (Lepidoptera: Pyralidae) on grain sorghum. Bull. Entomol. Res. 82:137–142.Google Scholar