التقييم الحيوي لبعض المستخلصات النباتية على خنفساء الحبوب ذات الصدر المنشاري Oryzaephilus surinamensis L. (Coleoptera : Silvanidae)‎

الملخص EN

The efficacy of dry powders, aquatic extracts and alcoholic extracts of five plants, leaves of oleander (Nerium oleander L.) and rocket (Eruca sativa), peppermint (Mentha piperta L.) and fruits of Azedarach (Melia azedarach L.), chilipepper (Capsicum annuum L.) using four different concentrations (25, 30, 35, 40) % In some biological aspects of saw toothed grain beetle Oryzaephilus surinamensis L.

Results showed that the dry powders gave highest main average of mortality percentage, which reached 78.55%, followed by alcoholic extract, reached to 77.3%.

The dry powder and alcoholic extract Peppermint in a high efficiency mortality ratio reached 87.5%.

The powders of oleander, Azedarach and Chilipepper plants showed repellent effect to O.

surinamensis L.

Which oleander plant gave the highest percentage of repletion reached 72%, while Rocket and peppermint plants showed attracted effect by 45 and 36%, respectively.

Rearing adults of O.

surinamensis L.

on rice grains treated with the plant powders (Oleander, Azedarach, Rocket, peppermint, and Chilipepper) effect on the biology of the insects.

The adults gave a progeny of 13.5, 35, 77.5 and 73.6 and 33.3 individuals from two pairs of insects respectively in comparison with 143 in the treatment of an individual comparison (rice only).