Original scientific paper

https://doi.org/10.33128/ag.79.3.1

APPLICATION OF INERT DUST DIATOMACEOUS EARTH IN CONTROL OF LESSER GRAIN BORER RHYZOPERTHA DOMINICA FAB. (COLEOPTERA: BOSTRICHIDAE) ON VARIETIES OF WHEAT, RYE AND OATS

Ivan Paponja ; student, Sveučilište J.J. Strossmayer, Poljoprivredni fakultet u Osijeku, Osijek, Hrvatska
Anita Liška orcid.org/0000-0002-9802-2480 ; Sveučilište J.J. Strossmayer, Poljoprivredni fakultet u Osijeku, Osijek, Hrvatska
Vlatka Rozman ; Sveučilište J.J. Strossmayer, Poljoprivredni fakultet u Osijeku, Osijek, Hrvatska
Pavo Lucić ; Sveučilište J.J. Strossmayer, Poljoprivredni fakultet u Osijeku, Osijek, Hrvatska

Abstract

Insecticidal effect of the commercial inert dust based on diatomaceous earth was tested in laboratory conditions against stored product pest, lesser grain borer Rhyzopertha dominica Fab. on three different varieties of wheat (Divana, Kraljica i Vulkan), oats (BC Marta, Winnipeg i Winsent) and rye (Albedo, Marcelo i Picasso). The aim of this study was to determine whether diatomaceous earth has the same efficacy at different varieties of cereals, and to determine the impact of dust on physical properties of varieties. At dose of 500 ppm after 7 days of exposure, the highest average mortality of lesser grain borer was achieved in rye (98.5%), followed by wheat (95.9%), and oats (84.2%). A significant difference in efficacy was observed only in oats; between varieties Winsent and BC Marta, and in the exposure time (between 7 and 21 days in BC Martha and Winnipeg, and between 7 and 14 days at variety Winsent). Diatomaceous earth reduced test weight of all tested varieties of cereals, especially of wheat varieties (by 4.3 to 5.0 kg hl-1). A minimum test weight reduction was observed in rye, at Marcelo variety (by 0.3 kg hl-1). Further, reduction in grain moisture (0.2 to 1.0%) and oscillation in grain temperature (± 0.1 to 0.4 °C) was noticed in all treated varieties of cereals (except for varieties Winsent). Results of this study showed that the efficiency of ditomaceous earth significantly depend on variety of cereals which is treated.

Keywords

inert dust; Rhyzopertha dominica (Fab.); cereal varieties; test weight

Hrčak ID:

193341

URI

https://hrcak.srce.hr/193341

Publication date:

30.1.2018.

Article data in other languages: croatian

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