Citrus Declinio in the State of Brazil: Occurrence and Responses to Blight Diagnostic Tests
Year: 1984
Type: conference-paper
Abstract: A disorder of citrus trees of undetermined cause, involving wilt, defoliation and general decline, has been observed in the State of Bahia, Brazil since 1970.Recent studies, using tests considered diagnostic for citrus blight in Florida, indicated the disease could be classified into two types: a typical blight or "declinio" type (CDB-T) and an atypical type (CDB-A).While both showed reduced water uptake and hydraulic conductivity rate, relatively high levels of water-soluble phenolics, potassium, and a greater number of vessel plugs than in healthy trees, only CDB-Taffected trees had higher zinc in outer trunk wood tissues.Attempts to determine any involvement of fungi, bacteria, and viruses in the occurrence of either disorder, and applications of growth-promoting substances, organic and inorganic fertilizers, mulching, scion-rooting, and severe pruning to induce tree recovery from decline symptoms have been unsuccessful.
DOI: 10.5070/c57976z00m
Author: O. R. Paguio
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2772604195