Identification of Colletotrichum Species Associated with Anthracnose of Camellia oleifera and Screening of Fungicides

doi:10.16409/j.cnki.2095-039x.2022.04.017

Abstract

Abstract: Anthracnose is one of the most common diseases of the tea-oil trees.In this study,isolates of Colletotrichum species were collected from the leaves of the tea-oil tree with anthracnose symptoms from six provinces in China.These isolates were further characterized based on morphology and phylogenetic analysis.All of the isolates were tested for sensitivities to fungicides using the mycelial growth rate method.In total,17 Colletotrichum isolates were isolated from diseased leaves of the tea-oil tree.The isolates were characterized as six species,including Colletotrichum camelllae,Colletotrichum fructicola,Colletotrichum siamense,Colletotrichum gloeosporioides,Colletotrichum kahawae,and Colletotrichum horri,and all belonged to Gloeosporioides complex.The isolates were sensitive to prochloraz,with the minimum mean EC₅₀value of 0.035 μg/mL,followed by fluazinam,carbendazim,fludioxonil,pyraclostrobin,difenoconazole,epoxiconazole,Benzovindiflupyr and tebuconazole,with the mean EC₅₀ values of 0.076,0.169,0.202,0.243,0.342,0.490,0.534 and 1.401 μg/mL,separately.In addition,the EC₅₀ values of tested isolates to azoxystrobin,boscalid,fluopimomide and fluopyram were higher than 100 μg/mL.

Key words: Camellia oleifera, anthracnose, Colletotrichum gloeosporioides, chemical control, fungicide

CLC Number:

S476

SUN Wei, YUAN Huizhu, CHEN Shuning. Identification of Colletotrichum Species Associated with Anthracnose of Camellia oleifera and Screening of Fungicides[J]. Chinese Journal of Biological Control, 2022, 38(4): 880-889.

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