تأثير حبوب أنواع المحاصيل النجيلية و مدة الخزن في الكثافة العددية لخنفساء الحبوب الشعرية و الفقد في وزن الحبوب و معدل نمو للحشرة Trogoderma granarium (Everts)‎ (Dermestidae : Coleoptera)‎

Abstract EN

The research aimed to know and determine the sensitivity types of gramineae seeds e t n teennt Trogoderma granarium(Everts( under the influence of various periods storage (4 and 2) months .

and The study was conducted under conditions of insects' laboratory, with an average temperature 2,36 ± 2 m and a relative humidity 14,47 ± 5% .

The results showed that there is increase in the average number of the insect by increase of the storage period, as the limit reached after four months of storage 76.264 insect, And the coarse grain is the most sensitive and its exposed to harm by this insect, as the average numbers of the insect each sample after four months of storage 433 insect In contrast the yellow soft maize Zea mays is the least sensitive by getting exposed by the insect, if the average number of insect after four months of storage 126 insect.

And Also the loss average in grain weight of each type by increased of the storage period and to varying degrees, but ranged from an average loss of 73.1 gm on Millet to 8.3 g on the grain wheat, and the period of storage from 2 to 4 months.

As for the rate of growth of the insect has It observed a clear reduction of the rate of growth of the insect to the different types of grain as it reached the highest 61.15 rate per person / month on the wheat coarse after 2 months of storage, and its low to 82.10 per person / month after four months of storage and generally the range of growth rate from 51, 3 person / month on yellow maize seeds to 22.13 person / month on coarse wheat seeds.