تقويم كفاءة المستخلص الكحولي لليوكاليبتوس و العفص الشرقي و مزجه بمبيدين حشريين ضد الأطوار غير الكاملة لفراشة درنات البطاطا-البطاطس في صنفي البطاطا-البطاطس بنيلا و سبونت

Abstract EN

Characterized by their availability in the local environment, low cost and being friendly to the environment, this study aimed to evaluate the effect of Eucalyptus spp.

and Thuja orientalis L.

alcoholic extracts on the control of potato tuber moth (Phthorimaea operculella Zeller.) under laboratory and field conditions in Afrin region, northwestern Aleppo Governorate, Syria, and the effect of mixing such extracts with two insecticides (SumiAlfa 5% EC, Imatox) for the control of the moth.

In the laboratory, there were no significant differences between the two insecticides (alone), as well as between the two studied potato varieties Benilla and Spunta (as general mean for all treatments).

The two pesticides and their interaction with Eucalyptus and Thuja extracts were superior for all traits evaluated.

Best laboratory results on the moth larval stage control were obtained by using 10% Eucalyptus extract concentration combined with the two insecticides and gave 61.67 and 68.33% effectiveness, in the two growing seasons, respectively.

Similarly, high effectiveness with the same treatment was obtained for the control of the moth pupal stage and reached 93.33 and 81.67%, in the two seasons, respectively.

Furthermore, the Eucalyptus 10% and Thuja 10% extracts gave highest reduction in moth's egg hatching rate in both seasons.

In field experiments, the Eucalyptus 10% extract gave the best result in controlling the moth immature stages, and consequently is recommended for use in IPM programs for the potato tuber moth.