Colletotrichum gloeosporioides (Penz.) Penz. & Sacc Feb11 plants become senescent become senescent plants or have experienced becomes apparent and the only after disease Unfortunately, infected symptomless tissue remains may render infected fruits un tissues of in weakened citrus orchards plants and The fungus is a primary invaderof injured or impact: Symptomand However and temperate subtropical, occur can on leaves, stems regions. The disease fruits and of host plants. of range in as on a anthracnose tropical, known wide plant causes species the commonly disease Colletotrichum Classification Disease: Name Common acervuli Fig. 1. Key Contact: Contact: Key Timmer G.E Brown, P, of 37 Diseases. (2000) Compendium Citrus Brown Reading: Further result tissue necrosis. in This which infections to germinate produce come contact in twigs, fruit leaves, and with that important dispersal. Conidia distance in long irrigation. overhead short or relatively by rain distances splash acervuli plant tissues and forms injured of abundance an C. dispersal life Disease and cycle: the lesions can also ooze pinkish spore masses from the rind tissues (Fig.1). In moist these conditions and that on lesions irregular become sunken brown but period at ‘post on the evident rind of fruit the during ‘pre symptoms stress are Disease conditions. rarely a
gloeosporioides acervuli , G.E (1992) Proc. Int. Soc. Citric. 3, 1044 Anthracnose
on PDA conidia pinkish , abundant L.W L.W 82, 415 (1998) Disease. Plant and conidia. Conidia can spread can spread over Conidia conidia. and
C. . gloeosporioides
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Pathogen of the month Pathogen :
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Golzar
- has seldom been reported reported has seldom been to be a primary pathogen on citrus species. marketable. marketable.
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Glomerella
Sordariomycetes
- 1048 subsequently reduce disease incidence. incidence. disease reduce subsequently the reduce time and required of will degreening for harvesting better natural fruit development colour in Delay significantly. anthracnose exposure enhance of ethylene levels The be higher maintained. should concentrations and of optimum duration degreening is necessary, proper ripening) ethylene (artificial treatment If fungicides. registered with degreening for control of fruit pests and damaging post storage process; pre transport,fruit during injury avoiding and packaging to plant debris of reduce the dispersal fungus inocula; include pruning dead wood and removal of infected to practices prevalence Cultural reduce disease Control: to infections form at post lesions factors further cause of development quiescent other by and harvesting. tissues weakened Injuries remain infections asymptomatic quiescent with before and are plant debris primary sources of Fruits inocula. thus are formed, acervuli colonized, subsequently tissue is
cingulata
completing the pathogen’s life cycle. wood cycle. life the Dead completing pathogen’s - c 38
appressoria
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February 2011 February Colletotrichum -
(d). Photos credits H. harvest insecticide application harvest application insecticide ) Spauld
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Phyllachoraceae
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