تقييم فاعلية التأثير الجاذب و الطارد لمساحيق أوراق خمسة أنواع من أشجار الغابات في بالغات خنفساء الحبوب الشعرية (Coleptera : Dermestidae)‎ (Everts)‎ Trogoderma granarium

Abstract EN

The study was conducted in Research Laboratory/College of Science-Koya University during (2015) at a mean of temperature 28 c and 67% R.H.

for the ability of finding the active way of protecting the grain stores from infection by grains beetle Trogoderma granarium (Everts) via testing the activity of the attraction and repellent action of leaves powder for Cypress, Cupressus sempervirens L., Pine, Pinus brutia Ten., Melia, Melia azedarach L., Thuja, Biota orientalis L.

and Eucalyptus, eucalyptus camaldulensis D.

with a range of concentration at weight ratios(weight/weight), 1, 2, 4, 6 and 8 % mixed with wheat grains and treated against the adults of Trogoderma granarium (Everts) .

The results showed that attraction percentages for the tested powders was ranged between 5 - 48.33.

Eucalyptus leaves powder, at concentration of 2%, Thuja 6 % and Cypress 1 and 2 % gave the highest attraction rates 48.33, 45, 41.66 and 44.66% respectively, whereas the lowest rates were given by Eucalyptus leaves powder,at concentration 4% which reaches 5%.

On the other hand the highest repellent percentages were given by Cypress at the concentrations 8 and 4% which reached 51.66 and 51.33 respectively, while the lowest rates were given by pine leaves powder at concentrations 2 and 1% which reached 10 and 8.33 % respectively.

As for the repellent force, the results also revealed that Cypress leaves powder has given the highest repellant force value against the adults 38.07 while the lowest value has been given by pine leaves powder 19.33 which had a significant difference as compared with other tested powders.

The results refer to the ability of using the plant powders for protecting stored grains against Trogoderma granarium (Everts) adults instead of chemical insecticides application.