(دراسة تأثير بعض التوابل في مكافحة بالغات حشرة خنفساء الدقيق المتشابهة (المحيرة Tribolium confusum du Val (Coleoptera : Tenebrionidae)‎

الملخص EN

The efficacy of three plants' powders was studied.

These plants were black pepper fruit piper nigrum L., nutmeg seeds Myristica fragrans Houtt and bay leaf leaves Laurus nobilis L.

against the confused flour beetle Tribolium confusum.

The percentage of the insecticidal effect at the concentrations 0.0, 5, 10 and 15 % (w/w) after two days, three days, one week, two weeks, three weeks and four weeks following treatment was estimated.

Also, the repellent effect for the insect was estimated at the following concentrations 0.0, 2, 5, 7.5, 10 and 15 % (w/w) over the period of three days, one week, 10 days and two weeks after treatment.

The results of the statistical data analysis showed that there were significant differences between efficacy of using plants' powders, which shows the nutmeg seeds powder exceeded significantly with insecticidal effect value of 25.35%, and then black pepper fruit with insecticidal effect value of 16.31% and the least value of 13.10% for the bay leaf leaves compared to control treatment (0.0%).

It was noticed that there was a significant increase of the percentage of the insecticidal at the concentration 5% (w/w) compared to control treatment (0.0%).

However, there were no significant differences with increasing the concentration to 10 and 15% as the percentages of the effect were 24.29 and 25.56% respectively.

Also, results of the repellent effect indicated that all plants' powders used showed that the repellent effect, and the bay leaf leaves powder was the most effective with percentage of repellent reached 59.42%, then nutmeg seeds 54.52%, then black pepper fruit powder 49.05% compared to control (0.0) which was the percentage of repellent 9.8%