la perception et la reconnaissance par I'insecte de composes tox-
iques pour son partenaire basidiomycete? Les recherches, pour-
suivies dans ce sens, devraient permettre d'apporter de nouveaux
elements pour la comprehension des relations particulieres entire
les Attines et les plants. Enfin, I'etude des mecanismes de pro-
tection des ignames est d'un interet agronomique evident : leur


connaissance permet d'imaginer de nouvelles methods de pro-
tection des cultures trop souvent ravages par les Attines :
-amelioration de varieties d'ignames par genie genetique (inclu-
sion des genes de synthese des antiappetants); -protection
d'autres cultures sensibles par pulverisation sur les feullages de
composes antiappetants.


Remerciements
 Ces travaux ont tE finances par la CORDET; contract Agronomie n C 101 (1983)
et seront achevEs grace a la meme aide n C 402 (1984).


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