Efficacy of three vegetal powders against Sitophilus granarius in stored wheat and the evaluation of their effect on grain parameters

ABSTRACT

Doses of 5,10,15, 20 and 25 g of three plant powders,Atractylisgummifera rhizome (AGRP), Daphne gnidium (DGP) and Thapsiagarganica (TGP), were added to 100 g of durum wheat to study their insecticidal effect and ability to preserve the agronomic characteristics of stored grains against the attacks of Sitophilus granaries durum wheat pest overa storage period of 6 months inTiaret district. Algeria. Our results showed that AGRP and DGPcaused 100% mortality, andTGP induced 90%. LD₅₀ and LD₉₀ values of 7.24, 8.51, 10.71 and12.88, 15.48, 26.91 g/100 g of wheat were recorded respectively with AGRP, DGP and TGP. We observed a highly significant reduction in the number of eggs laid and offspring emergence, a decrease in weight loss and grain damage, anda high germination percentage in the treated grains. The three powders represent a promising alternative against Sitophilusgranarius.

KEYWORDS:

• Durum wheat
• Atractylis gummifera
• Thapsia garganica
• Daphne gnidium
• Sitophilus granarius

Acknowledgments

The authors would like to thank Dr Labdelli Fatiha for helping to identify the insects; and also the anonymous reviewers. .

Disclosure statement

The authors declare no conflict of interest associated with this publication and there has been no financial support for this work that could have influenced its outcome.