تأثير مساحيق بذور البازلاء و الفاصولياء في الكثافة العددية و أضرار خنفساء الخابرة Trogoderma granarium Everts

الملخص EN

A study was conducted to evaluate the efficiency of several kinds of pea (Pisum sativum L.) and bean (Phaseolus vulgaris L.) powders (starch, crude, high-protein, pure protein) on the population density of Khapra beetle Trogoderma granarium Everts and the loss in grains weight due to infestation, when reared on wheat grains treated with these powders for 3 months under natural storageconditions.

Results indicated that the insect population density and the grain weight loss varied with the seed type and the kind and the concentration of the powder used.

Generally, the mixing of grains with powders caused a reduction of insect population density and grain weight loss.

The pure protein powder of pea or bean seeds was more effective than the other powders.

The total number of all stages (larvae + Pupae + adult insects) was 669.40 and 752.70 individuals and the weight loss of grains was 16.72 and 20.62%, three months after storage, respectively, as compared to 1249.00 individuals and 34.36% for the control treatment.

The effectiveness of the powders used was proportional to their concentration.