| colletotrichum gloeosporioides can overgrow colletotrichum kahawae on green coffee berries first inoculated with c. kahawae. | colletotrichum gloeosporioides is a weak pathogen of coffee that infects ripe berries at dark red stage causing necrotic lesions, but only penetrates up to the second superficial layers of the pericarp at the rose and pink stages. c. kahawae, the causal agent of coffee berry disease (cbd) and responsible for 70-80% of crop loss, infects berries at any stage of development. when green berries are first inoculated with c. kahawae and then at 2, 72 or 96 h later with c. gloeosporioides, the necroti ... | 2005 | 16049733 |
| purification and identification of cutinases from colletotrichum kahawae and colletotrichum gloeosporioides. | colletotrichum kahawae is the causal agent of the coffee berry disease, infecting leaves and coffee berries at any stage of their development. colletotrichum gloeosporioides is the causal agent of brown blight, infecting ripe berries only. both fungi secrete the same pattern of carboxylesterases to the fermentation broth when cutin is used as carbon source. by using two different strategies composed of two precipitation steps (ammonium sulphate and acetic acid precipitation) and two chromatograp ... | 2007 | 17043825 |
| appressorium turgor pressure of colletotrichum kahawae might have a role in coffee cuticle penetration. | the method of penetration of fungi through the host cuticle by means of cutinase versus mechanical pressure exerted by melanized appresoria has been the subject of debate. colletotrichum kahawae bridge & waller infects green coffee berries in africa, inducing 70-80% losses. turgor pressure (tp) of the appresoria was estimated in vitro to be 2.6 mpa, about twice the osmotic pressure (op) of the green berries. appresoria exposed in vitro to polyethylene glycol (peg) solution with ops of 7.0 mpa an ... | 2004 | 21148942 |
| ochratoxin a contamination of coffee batches from kenya in relation to cultivation methods and post-harvest processing treatments. | this study set out to assess the relative importance of sound and unsound beans in a batch of coffee with regard to ochratoxin a (ota) contamination. initially, unsound beans were found to account for 95% of contamination in a batch of coffee, whatever the methods used for post-harvest processing. it was also found that beans displaying traces of attacks by colletotrichum kahawae were the greatest contributors to ota contamination. in a second stage, the study compared the contamination of sound ... | 2010 | 20175009 |
| effect of shade on arabica coffee berry disease development: toward an agroforestry system to reduce disease impact. | coffee berry disease (cbd), caused by colletotrichum kahawae, is a major constraint for arabica coffee cultivation in africa. the disease is specific to green berries and can lead to 60% harvest losses. in cameroon, mixed cropping systems of coffee with other crops, such as fruit trees, are very widespread agricultural practices. fruit trees are commonly planted at random on coffee farms, providing a heterogeneous shading pattern for coffee trees growing underneath. based on a recent study of cb ... | 2008 | 19000007 |
| epicatechin and catechin may prevent coffee berry disease by inhibition of appressorial melanization of colletotrichum kahawae. | colletotrichum kahawae is the causal agent of coffee berry disease. appressorial melanization is essential for the fungal penetration of plant cuticle. epicatechin is abundant in green coffee berry pericarp. inoculation of c. kahawae conidial suspension containing 1.2 mg epicatechin or catechin/ml did not affect conidial germination or appressorial formation but appressorial melanization was completely inhibited and infection by the treated conidia was less than 30% of the untreated control. epi ... | 2006 | 16955359 |