PRODUTIVIDADE E QUALIDADE DO MARACUJÁ-AMARELO ADUBADO COM FERTILIZANTE FOLIAR ASSOCIADO A INDUTORES DE RESISTÊNCIA

Abstract

The present study aimed to evaluate the productivity and fruit quality of yellow passion fruit (Passiflora edulis Sims f. flavicarpa) subjected to foliar fertilization with fertilizers based on yeast extract and micronutrients. The experiment was conducted at the Instituto Federal Goia- no – Morrinhos Campus, on an eutrophic Red-Yellow Latosol. Three treatments were tested: T1 (control, without foliar fertilization), T2 (Liqui-Plex® CaMg+B + Liqui-Plex® Fruit + Li- qui-Plex® Finish), and T3 (Agro-Mos® + Liqui-Plex® Fruit + Crop-Set® + Liqui-Plex® CaMg+B + Liqui-Plex® Finish), with eight replications each. The variables analyzed were number and mass of fruits, yield, soluble solids content (°Brix), and incidence of leaves sho- wing symptoms of the bacterium Xanthomonas axonopodis pv. passiflorae.The results sho- wed that treatment T3 presented the best performance, with increases of 126% in the number of fruits, 150.5% in fruit mass per plant, and 149.3% in yield compared to the control trea- tment. There was no significant difference in average fruit mass, soluble solids content (°Brix), or number of diseased leaves. The severe incidence of bacterial spot, associated with climatic conditions favorable to disease development, reduced the overall productive potenti- al. However, the combined use of fertilizers complexed with amino acids and the plant extract products Agro-Mos® and Crop-Set® contributed to better plant development, induction of re- sistance, and higher productivity.It is concluded that foliar fertilization with yeast extract, or- ganic carbon, and amino acids, associated with the use of plant extract–based products, is a promising practice to increase productivity and mitigate stress in passion fruit plants, although it did not significantly influence the chemical quality of the fruits.