Grafting guava on cattley guava resistant to Meloidogyne enterolobii

Enxertia da goiabeira sobre araçazeiros resistentes a Meloidogyne enterolobii

The use of resistant rootstocks could be a promising method to control nematodeMeloidogyne enterolobii in commercial plantations of guava. The present study aimed to evaluate the success of grafting guava as a scion on accessions of cattley guava as rootstocks resistant to M. enterolobii. The treatments consisted of the rootstocks cattley guava plants (three accessions of Psidium cattleyanum) and common guava (control). In the apical wedge grafting method, scion of Paluma cultivated variety was used. The experiment was arranged in a randomized block design with four treatments and five replicates, and eight plants per plot. The saplings produced as described before were planted in the field where the initial growth of the different combinations were evaluated. Graft success was observed for the control (common guava) and for accessions 115 and 117 of cattley guava plants, with success rates of 63, 32 and 29%, respectively. In the field, the cattley guava used as rootstocks hampered Paluma canopy development and caused death of plants. Incompatibility of P. cattleyanum as rootstocks for P. guajava Paluma was confirmed one year after cultivation in field.

Psidium guajava; Guava decline; guava root-knot nematode