Efficacy of ozone gas against two stored product insects

Abstract EN

Efficacy of ozone gas against two of stored product insects, larvae and eggs of almond moth Ephestia cautella (Walker) (Lepidoptera: Pyralidae)and larvae and adults of the saw-toothed grain beetle, Oryzaephilus surinamensis (Coleoptera: Cucujidae) at 30 ± 1°C was tested.

The results showed that mortality increased gradually by increasing exposure time of ozone gas.

Mortality percent for larvae of E.

cautella was 10% at 0.5 h.

exposure and reach to 100% at 4 hrs.

after 7day of exposure period.

Reduction of egg numbers was 7.65% at 0.5 hrs.

exposure period and increased to 81.25% at 4 hrs.

These results showed that eggs more tolerant to ozone gas than the larvae.

Mortality percent of O.

surinamensis adults was 5.2% at 1h.

exposure period and increased to 90.4% at 4 hrs.

after 7 days of exposure.

Mortality of larvae of O.

surinamensis was 6.4% at 0.5 hrs.

exposure and increased to 92% at 4 hrs.

after 7 days of exposure period.