الخلاصة:
The Saharian regions have witnessed a considerable expansion in agriculture especially after the national
programmes fostering agricultural investments.
Our study was conducted in Ghardaia aiming to valorize the leaves of Liliaceae as a means of biological
control thanks to their insecticidal effect on the aphids . Actually, leaves of Liliaceae are considered to be
the most effective destroyer.
The study showed that treating with a liquid solution based on powdre (Allium sativum L.) , or the onion
powder (Allium cepa) or the mixture of both applied in a greenhouse can constitute a very interesting
means of biological control . The results show an average rate of mortality respectively equalling 38.77%,
20,33% and 31,88% for the garlic, Onion and the mixture of the two.
