REAÇÃO DE ARAÇAZEIRO A DIFERENTES NÍVEIS POPULACIONAIS DE Meloidogyne enterolobii

Abstract

Fruit growing is a highlight in national agribusiness and Brazil is the world's third largest fruit producer. In Brazil guava reaches productivity of 26.4 t.ha-1. However, the plant can be attacked by phytomatoides, such as Meloidogyne enterolobii which causes damage to the roots, affecting productivity. There are few studies to find efficient strategies for the management of guava nematode, mainly associated with genetic resistance, with the use of rootstock. Thus, the aim of this study was to evaluate the reaction of the araçazeiro, Psidium guineense, at different levels of inoculation of M. enterolobii. The experiment was conducted in a greenhouse, in a completely randomized design, with 6 treatments (0; 500; 1,000; 3,000; 5,000 eggs and J2s per araçazeiro and 1,500 eggs and J2s in the eggplant used as a susceptibility pattern) and 6 replicates. To conduct the experiment, phytonematoid was multiplied in eggplant and inoculated at 152 days after sowing in the araçá seedlings. All inoculated populations multiplied, demonstrating the susceptibility of the material to M. enterolobii. The treatment of 500 eggs/J2s showed the highest reproduction factor (RF=20.6). As the initial population increased, there was a reduction in RF. T3 (1,000 eggs and J2s) presented the highest IG and EMI.