Protection of Irradiated Stored Maize against Angoumois Grain Moth, Sitotroga cerealella (S) And Zea Weevil, Sitophilus zeamais (L) by Using some Botanical Oils

A., Mikhaiel A.; I., Attia A.; L., Mehany A.

doi:10.21608/eajbsf.2019.54811

Protection of Irradiated Stored Maize against Angoumois Grain Moth, Sitotroga cerealella (S) And Zea Weevil, Sitophilus zeamais (L) by Using some Botanical Oils

Document Type : Original Article

Authors

¹ Biological Application Department, Nuclear Research Center -, Atomic Energy Authority.P.O .Box 13759, Abo-Zaabal, Egypt

² Plant Research Department, Nuclear Research Center -, Atomic Energy Authority.P.O .Box 13759, Abo-Zaabal, Egypt

10.21608/eajbsf.2019.54811

Abstract

The 3KGy dose caused complete mortality for Sitophilus zeamais adults 48h post-irradiation. The eggs of Sitotroga cerealella failed to hatch at both doses 1.5&3KGy. Usually the newly hatched larvae from irradiated eggs with 0.75 KGy died soon after hatching without passing through metamorphosis. Different concentrations (0.5, 1, 2, 4 and 8 %) from four selected oils of onion, clove, and orange were tested for their toxicity activity against eggs and weevils. Experiments conducted revealed that garlic oil at 4% concentration was more efficient against the adult weevil than the egg moth and exposure period 48h, which gave 100% and 76.66 % mortality, respectively. It was noticed that the same trend of toxicity for the three other oils held for both species. The reduction in the percent eggs hatched; pupation and emergence were directly proportional to the level of concentrations of tested oils and the time of exposure. Also, the reduction in the F₁progeny weevils was positively correlated with concentration and exposure time. It is possible using both favorite oils garlic and clove at LC95% to spraying polypropylene sacs for protection irradiated maize grains with a dose 3KGyfrom reinfestation by the tested insect within the storage period tested.

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