Evaluation of natural chemical compounds against the root-lesion nematode Pratylenchus brachyurus and side-effects on the infectivity of Glomus mosseae and Glomus intraradices.

CALVET, CINTA¹, JORGE PINOCHET¹, RODRIGO RODRÍGUEZ-KÁBANA², AMÈLIA CAMPRUB͹ & VICTORIA ESTAÚN¹.

¹Institut de Recerca i Tecnologia Agroalimentàries, Departament de Patologia Vegetal, Ctra. de Cabrils s/n, 08348 Cabrils, SPAIN. ² Auburn University, Department of Plant Pathology, Auburn, AL 36849-5409, USA.

Adults and larvae of P. brachyurus and infective propagules of the arbuscular mycorrhizal fungi Glomus mosseae and Glomus intraradices were subjected to saturated atmospheres of thirteen natural chemical compounds including aldehydes, alcohols and acids during four days. The mortality of the nematode was assessed after each chemical treatment.The survival and the infectivity of AM propagules was evaluated by inoculating leek plantlets once they were removed from the sealed atmospheres. After six weeks growth under greenhouse conditions, the AM root colonization was determined.
The efficacy of natural compounds for the control of nematodes in rates not affecting mycorrhizal infection in host plants is discussed.