Reação de plantas daninhas ao parasitismo pelo nematoide das galhas da goiabeira, Meloidogyne enterolobii

The nematode Meloidogyne enterolobii (Yang & Eisenback) is one of the main pathogens associated with guava tree (Psidium guajava L.) in northeastern Brazil. Considering frequency which weeds are found fruit production areas and their potential as phytonematode hosts, aim this study was to investigate reaction parasitism M. enterolobii. species evaluated for infection were Acanthospermum hispidum DC., Ageratum conyzoides L., Alternanthera tenella Colla., Amaranthus deflexus A. spinosus viridis Bidens pilosa Clitoria ternatea Datura stramonium Macroptilium lathyroides (L.) Urb., Merremia aegyptia Solanum americanum Mill., S. paniculatum L. Spigelia anthelmia Of these, only six classified susceptible pathogen factor breeding >1.0: paniculatum, americanum, B. pilosa, conyzoides, tenella, aegyptia, fourspecies resistant: anthelmia, lathyroides, C. ternatea, D. four behaved immune nematode: hispidum, deflexus, spinosus, viridis. From results obtained, it that weed may pose a threat cultivation guava, serving source inoculum. Control measures infested orchards should consider hostability these plants order recommend careful removal from cultivated area.