Morphological and Molecular Identification of the Fungus Associated with Pink Disease of Cocoa (Theobroma cacao L) in the Eastern Region of Ghana

Kwarteng, F. G.; Cornelius, E. W.; Acquah, K. K.; Asare, Eric Kumi

doi:10.9734/ijpr/2018/v1i11161

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…It causes the disease commonly called 'pink disease' because of a distinctive salmon to pink coloured mycelial growth of the fungus on affected plants. Although the pathogen is globally distributed, it is commonly found in the humid tropics (1,2). It occurs on a wide range of important tropical crops including Theobroma cacao L., (cocoa).…”

Section: Introductionmentioning

confidence: 99%

Influence of nutrient sources and environmental conditions on vegetative growth of fungus, Erythricium salmonicolor (Berk. & Broome) Burdsall in cocoa

Amoako-Attah

Kumi-Asare²,

Bukari³

2022

Plant Sci. Today

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Erythricium salmonicolor is the cause of pink disease in cocoa in the humid tropics. The growth of 4 isolates (ES-WR006, ES-WR008, ES-ER009 and ES-ER010) of the fungus on different sources of nutrient (carbohydrate, amino acid and vitamin) and environmental conditions (temperature, pH and light) were evaluated in the laboratory. The pink disease isolates utilised the nutrients to different extent, with the best radial mycelial growth rate achieved with isolate ES-WR008 followed by ES-WR006. None of the isolates produced spores in the laboratory. The isolates utilised polysaccharides as best as disaccharides and monosaccharaides. Among 7 amino acids assayed, aspartic acid was the most promising for vegetative growth. The best radial mycelial growth on vitamins was attained on folic acid and riboflavin. The minimum, optimum and maximum temperatures for growing the fungus were 18 °C, 28 °C and 34 °C respectively. Survival of E. salmonicolor isolates within the temperature range of 18-34 °C is consistent with temperatures for growing cocoa in Ghana. The isolates also grew well within a pH range of 4-8, with the best growth at pH 6. Light quality and duration influenced the vegetative growth of the isolates. Pink disease isolates maintained in 24 hr darkness or 24 hr light performed better than in alternating 12 hr darkness and 12 hr light. There was a significant (p<0.05) repressive effect of the alternating dark and light exposures on vegetative growth of the fungus. The implications of the results for efficient management of the cocoa disease are discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of nutrient sources and environmental conditions on vegetative growth of fungus, Erythricium salmonicolor (Berk. & Broome) Burdsall in cocoa

Amoako-Attah

Kumi-Asare²,

Bukari³

2022

Plant Sci. Today

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“…Conidia were also found on rubber rods (Florina et al, 2017). However, conidia or sporulation structures were not observed on the colonies growing on PDA (Kwarteng et al, 2018;Akrofi et al, 2015). This due to the formation of conidia in U. salmonicolor triggered by natural factors such as humidity, temperature, and light.…”

Section: Scoresmentioning

confidence: 99%

DEVELOPMENT OF PINK DISEASE ON VARIOUS AGES OF Acacia crassicarpa CUNN EX. BENTH.

Suryantini

Soelistijono

2020

Jurnal Hama dan Penyakit Tumbuhan Tropika

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Development of pink disease on the various ages of Acacia crassicarpa Cunn Ex. Benth.. The increase in the value of pulp and paper exports in Indonesia is partly due to the development of industrial forest plantations of acacia on peatlands. Acacia crassicarpa grows well on peatlands with high productivity. However, the development of pink disease is a threat to the growth of A. crassicarpa, both in the nursery and in the field. This study aimed at examining the development of pink disease on the various ages of A. crassicarpa. The study was conducted using census method on plants at aged 4, 24 and 42 months. Variables observed were symptoms, incidence, and severity of disease. Data were analyzed descriptively and regressively to understand the relationship between the incidence and severity of the disease and the age of the plant. The results showed that the symptoms that appearing at the seedling level were similar to those the sapling, poles and tree level. The presence of thin colonies of cobweb-like (cobweb stage), mycelia aggregation from the cobweb stage (pseudonodular stage), and the appearance of pustules and pink incrustation (teleomorph stage) were common symptom. However, disease incidence and severity were moderate at the seedling and mild at the saplings, poles and trees level. The incidence and severity of disease decreased with increasing age.

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In vitro activity of soybean extract on cocoa disease pathogens (Erythricium salmonicolor and Marasmiellus scandens) and termite pest (Microtermes subhyalinus)

Bukari

Avicor

Awudzi

et al. 2022

Cogent Food & Agriculture

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Morphological and Molecular Identification of the Fungus Associated with Pink Disease of Cocoa (Theobroma cacao L) in the Eastern Region of Ghana

Cited by 3 publications

References 6 publications

Influence of nutrient sources and environmental conditions on vegetative growth of fungus, Erythricium salmonicolor (Berk. & Broome) Burdsall in cocoa

Influence of nutrient sources and environmental conditions on vegetative growth of fungus, Erythricium salmonicolor (Berk. & Broome) Burdsall in cocoa

DEVELOPMENT OF PINK DISEASE ON VARIOUS AGES OF Acacia crassicarpa CUNN EX. BENTH.

In vitro activity of soybean extract on cocoa disease pathogens (Erythricium salmonicolor and Marasmiellus scandens) and termite pest (Microtermes subhyalinus)

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