+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Temperature the major factor affecting the population balance of phytophthora spp causing pod rot of cacao theobroma cacao in bahia brazil



Temperature the major factor affecting the population balance of phytophthora spp causing pod rot of cacao theobroma cacao in bahia brazil



Revista Theobroma 13(4): 361-376



Studies were undertaken to determine the causes for the predominance of P. capsici in the cacao growing areas of Bahia, and the influence of temperature on the mycelial growth and zoospore production of P. capsici, P. palmivora and P. citrophthora, agents of the cacao pod rot. Comparative in vitro tests were made on carrot agar (CA), under continuous light at a temperature range from 5-35.degree. C, for growth, and 15-32.degree. C for sporulation. Cardinal temperatures for growth varied from 5-8.degree. C, 25-30 and 35.degree. C for P. palmivora; 5.degree., 25-30.degree. and 35.degree. C for P. capsici; and 5-8.degree., 27.degree. and 32-35.degree. C for P. citrophthora. P. palmivora was less sensitive to high temperatures (30-35.degree. C) and more sensitive to lower temperatures (5-18.degree. C) as compared to other species. In relation to sporulation, cardinal temperatures ranged: 15.degree., 27.degree. and 30-32.degree. C for P. capsici; 20.degree., 27-30.degree. and 32-35.degree. C for P. palmivora; and 20.degree., 27.degree. and 32.degree. C for P. citrophthora. P. capsici showed the widest temperature range for sporulation and higher spore production than the others, and at 27.degree. C produced 2 and 3 times more zoospores than P. palmivora and P. citrophthora, respectively. This last species had a reduced zoospore production as compared to the others though chlamydospores were formed at 15 and 18.degree. C. Temperature is apparently a major factor for the balance and prevalence of P. capsici in the cacao growing area of Bahia, Brazil.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 006585688

Download citation: RISBibTeXText


Related references

Methodology for evaluating resistance of cacao theobroma cacao cultivars and hybrid progenies to phytophthora spp causing phytophthora pod rot in bahia brazil. Revista Theobroma 13(4): 349-360, 1983

Influence of agro-environmental factors on the quality of cacao (Theobroma cacao L.) clone PH-16 in the cacao region of Bahia, Brazil. Ecosistemas y Recursos Agropecuarios 4(12): 579-587, 2017

Relationships of climatic variables and cacao theobroma cacao production of the unit farm of the cacao research center bahia brazil. Revista Theobroma 14(2): 143-148, 1984

Associations between cacao (Theobroma cacao) and shade trees in southern Bahia, Brazil. Serie Tecnica: Informe Tecnico Centro Agronomico Tropical de Investigacion y Ensenanza (117): 137-154, 1987

Shade cacao plantations (Theobroma cacao) and bat conservation in southern Bahia, Brazil. Biodiversity and Conservation 16(2): 291-312, 2007

History of the introductions of cacao (Theobroma cacao L.) into the Reconcavo da Bahia, Brazil. Revista Theobroma 10(3): 135-140, 1980

Relation between nematode attack and sudden death in cacao (Theobroma cacao L.) in Bahia, Brazil. Turrialba. 19: 2, 255-260, 1969

Scolytidae and Platypodidae, Coleoptera, as pests of cacao trees (Theobroma cacao L.) especially in the state of Bahia, Brazil. 1971

Present status of the studies on the clay mineralogy of the soils of the cacao theobroma cacao region of bahia brazil. Revista Theobroma 15(1): 43-48, 1985

Scolytidae and platypodidae coleoptera as a cause of damage to the cacao d tree theobroma cacao d with special consideration of bahia brazil. Papeis Avulsos de Zoologia (Sao Paulo) 25(8): 57-68, 1971

Guide for the identification of the ambrosia beetles coleoptera scolytidae associated with the cacao tree theobroma cacao l. in the south of bahia brazil. Revista Theobroma 17(1): 17-30, 1987

Temperature, the predominant factor in population balance of Phytophthora species causing pod rot of cocoa in Bahia, Brazil. Revista Theobroma 13(4): 361-375, 1983

Susceptibility of hybrid cacao cultivars theobroma cacao to the fungus phytophthora palmivora in the state of sao paulo brazil. Fitopatologia Brasileira 10(2): 293, 1985

Occurrence of halisidota sp lepidoptera arctiidae and its parasitoids on cacao theobroma cacao trees in southern bahia brazil and evaluation of insecticides for the control. Revista Theobroma 14(3): 193-198, 1984

Bamboo bambusa vulgaris schard. as shelterbelt for young cacao trees theobroma cacao l. shaded by bananas musa sapientum l. in the reconcavo bahia brazil. Revista Theobroma 17(1): 1-8, 1987