Skip to main content
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 2
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Athanassiou, C.G. Arthur, F.H. and Throne, J.E. 2009. Efficacy of spinosad in layer-treated wheat against five stored-product insect species. Journal of Stored Products Research, Vol. 45, Issue. 4, p. 236.

    Athanassiou, C.G. Korunic, Z. and Vayias, B.J. 2009. Diatomaceous earths enhance the insecticidal effect of bitterbarkomycin against stored-grain insects. Crop Protection, Vol. 28, Issue. 2, p. 123.

  • International Journal of Tropical Insect Science, Volume 26, Issue 1
  • March 2006, pp. 28-34

Penetration of Sitophilus zeamais (Coleoptera: Curculionidae) through diatomaceous earth-treated bulk maize grain

  • B.M. Mvumi (a1), T.E. Stathers (a2), P. Golob (a2) and D.P. Giga (a3)
  • DOI:
  • Published online: 01 February 2007

The penetration of adult Sitophilus zeamais Motschulsky through maize grain bulks (0.75 m deep), treated with Protect-It®, a diatomaceous earth (DE) at 0, 0.05, 0.1 and 0.2% (w/w), was determined 12 weeks after weevils were released at the upper surface of the grain. Maize was stored in columns in polyvinyl chloride (PVC) pipes, under controlled conditions of 26±2°C and 70±10% RH. Grain samples were collected from various pre-determined depths and the numbers of S. zeamais adults counted. Differences in insect numbers between treatments and at different depths from which samples were collected were highly significant (P<0.001). The bottom 2–3 layers (0.65–0.75 m deep) had significantly more insects than the upper layers for all the DE concentrations. No significant differences in total insect numbers (live+dead) were found between the DE concentrations. Dead S. zeamais weevils were found at the bottom of grain treated with Protect-It®, indicating that insects can penetrate through DE-treated grain 0.75 m deep but then subsequently die. There was no strong evidence that DEs admixed with bulk grain restrict S. zeamais movement within the grain.

Corresponding author
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

Z. Korunic (1998) Diatomaceous earths, a group of natural insecticides. Journal of Stored Products Research 34, 8797.

Z. Korunic , S. Cenkowski and P. G. Fields (1998) Grain bulk density as affected by diatomaceous earth and application method. Postharvest Biology and Technology 13, 8189.

Z. Korunic , P. G. Fields , M. I. P. Kovacs , J. S. Noll , O. M. Lukow , C. J. Demianyk and K. J. Shibley (1996) The effect of diatomaceous earth on grain quality. Postharvest Biology and Technology 9, 373387.

S. Navarro , T. G. Amos and P. Williams (1981) The effect of oxygen and carbon dioxide gradients on the vertical dispersion of grain insects in wheat. Journal of Stored Products Research 17, 101107.

M. Rigaux , E. Haubruge and P. G. Fields (2001) Mechanisms for tolerance to diatomaceous earth between strains of Tribolium castaneum. Entomologia Experimentalis et Applicata 101, 3339.

T. E. Stathers , B. M. Mvumi and P. Golob (2002) Field assessment of the efficacy and persistence of diatomaceous earths in protecting stored grain on small-scale farms in Zimbabwe. Crop Protection 21, 10331048.

G. Surtees (1964) Laboratory studies on dispersion behaviour of adult beetles in grain. VI. Three-dimensional analysis of dispersion of five species in a uniform bulk. Bulletin of Entomological Research 55, 723725.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

International Journal of Tropical Insect Science
  • ISSN: 1742-7584
  • EISSN: 1742-7592
  • URL: /core/journals/international-journal-of-tropical-insect-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *