, Volume 23, Issue 4, pp 355–356 | Cite as

Suppression ofbactra venosana, a potential natural enemy ofcyperus rotundus, bytrichogrammatoidea bactrae in Bangalore, India

  • P. N. Ganga Visalakshy
  • K. P. Jayanth


Bactra venosana Zeller (Lepidoptera: Tortricidae) is the predominant natural enemy ofCyperus rotundas L. in Bangalore, India. Although the insect was found to have potential, it was incapable of suppressing the weed due to low incidence. Laboratory studies involving field-collected insect stages revealed that heavy parasitism of eggs byTrichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae) was the most important mortality factor suppressing its potentiality.

Key Words

Cyperus rotundus Bactra venosana potential natural enemy Trichogrammatoidea bactrae suppression 


  1. 1.
    Frick, K.E. and Chandler, J.M. (1978) Augmenting the moth (Bactra verutana) in field plots for early suppression of purple nutsedge (Cyperus rotundus).Weed Sci. 26: 703–710.Google Scholar
  2. 2.
    Frick, K.E. and Garcia, C. Jr. (1975)Bactra verutana as a biological agent for purple nutsedge control.Abstr. Weed Sci. Soc. Am. 1974: 66–67.Google Scholar
  3. 3.
    Habib, R. (1976)Bactra spp. in Pakistan and their potential as biocontrol agents ofCyperus rotundus.PANS 22: 499–508.Google Scholar
  4. 4.
    Holm, L.G., Plucknett, D.L., Pancho, J.V. and Herberger, J.P. (1977) The World’s Worst Weeds — Distribution and Biology. University Press of Honolulu, Honolulu, HI, USA.Google Scholar
  5. 5.
    Poinar, G.O. Jr. (1964) Studies on nutgrass insects in southern California and their effectiveness as biological control agents.J. Econ. Entomol. 57: 379–383.Google Scholar
  6. 6.
    Poinar, G.O. Jr. (1964) Observations on nutgrass insects in Hawaii with host range ofBactra truculenta Meyrick andAthesapeuta cyperi Marshall.Proc. Hawaii. Entomol. Soc. 18: 417–423.Google Scholar
  7. 7.
    Sankaran, T. and Srinath, D. (1966) Observations on the biology ofBactra (Nanobactra) minima minima Meyrick and the damage caused by it toCyperus rotundus L.Commonw.Inst. Biol. Control Tech. Bull. 7: 139–147.Google Scholar

Copyright information

© Springer Science + Business Media B.V. 1995

Authors and Affiliations

  • P. N. Ganga Visalakshy
  • K. P. Jayanth
    • 1
  1. 1.Div. of Entomology and NematologyIndian Institute of Horticultural Research, Hessaraghatta Lake PostBangaloreIndia

Personalised recommendations