Studies on the Cause of the Fruta Bolita or Declinamiento Disease of Citrus in Argentina

Schwarz, R. E.; Argüelles, Teresa; Monsted, P.; Wutscher, Heins; Termachuka, L.

doi:10.5070/c55bw7064h

Cited by 4 publications

(1 citation statement)

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“…Scion rooting sweet orange trees in A rgentina has prevented or even re versed declinam iento (9). This may n o t be true for grapefruit trees (Table 1).…”

Section: ( 2)mentioning

confidence: 99%

Blightlike Citrus Tree Declines in South America and South Africa1

Wutscher

Schwarz

Campiglia

et al. 1980

horts

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Water injection tests and analysis of the outer trunk wood for Zn, K, Mg, CI, and water-soluble phenolics of trees declining of declinamiento or fruta bolita (Argentina), marchit-amiento repentino (Uruguay), declinio (Brazil), and an unnamed decline in South Africa showed that these trees behave like blight-affected trees in Florida. Water uptake of declining trees is reduced, and Zn, K, Mg, and CI levels in the wood are usually higher than in healthy trees. Trees of ‘Valencia’, ‘Westin’, ‘Tarocco’, ‘Calderon’, ‘Natal’, ‘Alidjan’, and ‘Washington navel’ sweet oranges (Citrus sinensis (L.) Osbeck), ‘Eureka’ and ‘Lisbon’ lemons (C. limon (L.) Burm. f.), ‘Marsh’ grapefruit (C paradisi Macf.), and ‘Comun’ mandarin (C. reticulata Blanco) on trifoliate orange (Poncirus trifoliata (L.) Raf.), rough lemon (C. limon), Cleopatra mandarin (C. reticulata), and Rangpur (C. reticulata hybrid) rootstocks were used in this study.

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“…Scion rooting sweet orange trees in A rgentina has prevented or even re versed declinam iento (9). This may n o t be true for grapefruit trees (Table 1).…”

Section: ( 2)mentioning

confidence: 99%

Blightlike Citrus Tree Declines in South America and South Africa1

Wutscher

Schwarz

Campiglia

et al. 1980

horts

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Citrus Blight and Other Diseases of Recalcitrant Etiology

Derrick

Timmer

2000

Annu. Rev. Phytopathol.

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Several economically important diseases of unknown or recently determined cause are reviewed. Citrus blight (CB), first described over 100 years ago, was shown in 1984 to be transmitted by root-graft inoculations; the cause remains unknown and is controversial. Based on graft transmission, it is considered to be an infectious agent by some; others suggest that the cause of CB is abiotic. Citrus variegated chlorosis, although probably long present in Argentina, where it was considered to be a variant of CB, was identified as a specific disease and shown to be caused by a strain of Xylella fastidiosa after if reached epidemic levels in Brazil in 1987. Citrus psorosis, described in 1933 as the first virus disease of citrus, is perhaps one of the last to be characterized. In 1988, it was shown to be caused by a very unusual virus. The cause of lettuce big vein appears to be a viruslike agent that is transmitted by a soilborne fungus. Double-stranded RNAs were associated with the disease, suggesting it may be caused by an unidentified RNA virus. Rio Grande gummosis, dry rot root, peach tree short life, and some replant diseases may be diseases of complex etiology. Various microorganisms have been isolated from trees with these diseases, but the diseases may be attributable in part to environmental factors. Determination of the cause of these diseases of complex etiology has proven difficult, in part, because they affect only mature trees.

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Studies of "Declinamiento" in Citrus in the Northwest of Argentina

González¹,

Jun²,

Leal³

et al. 1984

International Organization of Citrus Virologists Conference Proceedings (1957-2010)

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I n 1974, declining citrus plants were observed in the northern part of Salta province with symptoms similar to "blight" of Florida and to "fruta bolita" of Misiones. Due to the damage observed and the danger of spread in the region, INTA, EERA, Famailla started studies to determine the identity of the disease, its causes and possibilities of control. This paper reports information on distribution and spread of the disease, citrus combinations affected, relationships with soil and nutritional factors, nematode and fungus occurrence and transmission tests.

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Studies on the Cause of the Fruta Bolita or Declinamiento Disease of Citrus in Argentina

Cited by 4 publications

References 0 publications

Blightlike Citrus Tree Declines in South America and South Africa1

Blightlike Citrus Tree Declines in South America and South Africa1

Citrus Blight and Other Diseases of Recalcitrant Etiology

Studies of "Declinamiento" in Citrus in the Northwest of Argentina

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