ABSTRACT
Rust (Austropuccinia psidii), considered one of the major eucalyptus diseases, can cause serious damage to the crop in case adequate management strategies are not implemented. In general, there is eucalyptus monoculture, for which epidemiological implications are important. The aim of this study was to compare rust progress in eucalyptus intercropped with different species, in agroforestry system, under natural infection conditions. The experiment consisted of three treatments (consortia), in completely randomized arrangement in space. In each treatment eucalyptus was planted with two different species, namely: T1 - Australian Cedar (Toona ciliata) + Eucalyptus (Eucalyptus urograndis) + Banana (Musa acuminata); T2 - consortium “Amora” (Morus celtidifolia) + Eucalyptus + “Pupunha” (Bactris gasipaes), and T3 - African Mahogany (Khaya ivorensis) + Eucalyptus + Banana. Each treatment had six replicates, totaling 18 plots of 9 m2 each (2 m x 4.5 m), arranged in lines/alleys. Plant height and diameter, and disease incidence and severity were analyzed every fifteen days. Data were collected in two different moments: pre-pruning, from 08/17/2018 to 09/01/2019, and post-pruning, from 04/17/2019 to 08/13/2019. The data underwent analysis of variance and means were compared according to Tukey’s test (p<0.05). Eucalyptus presented better development (height and diameter) and lower disease intensity (incidence and severity) in treatment T2. The results lead to the conclusion that planting eucalyptus in the consortium Amora + Eucalyptus + Pupunha provided reduced rust intensity and greater plant development.
Keywords
Eucalyptus rust; Agroforestry arrangements; Species consortium
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