Résumé:
The white grubs of the crops cause considerable damage, they are pests ,Polyphages that
attack practically many cultures. The damage caused is localized on the roots. This study aims
to propose alternative solutions based on the use of natural products "bio-control" in order to
fight against the white grub of the vine Which is considered a serious threat to viticulture in
Algeria. The main objective of our work is to check the effectiveness of essential oils of
T.vulgaris and O.vulgare in vitro on larvae. These extracts were extracted at The results
obtained from the in vitro tests show that the essential oil of T.vulgaris (LD50 = 0.62%) more
toxic than O.vulgare (LD50 = 2.5%) The second part of the work involves the identification
of the insect. The comparison of our results allowed us to propose a preliminary identification
of the pest based on the morphology of the larvae. But this is not confirmed since we were
unable to collect adults for identification.The third part deals with the geographical
distribution of grubs in the wilaya of Mostaganem, in the course of six agricultural
companions.
