Plant Pathology (2022) 71, 1594-1605

Abdul Omar Nur-Shakirah, Mohd Safie Khadijah, Yee Jia Kee, Abd Rahim Huda-Shakirah, Abu Bakar Mohd Hafifi, Yakath Ali Nurul-Aliyaa, Bee Lynn Chew, Latiffah Zakaria, Nik Mohd Izham Mohamed Nor, Subramaniam Sreeramanan, Yin-Hui Leong and Masratul Hawa Mohd. (2022)
Characterization of Lasiodiplodia species causing leaf blight, stem rot and fruit rot of fig (Ficus carica) in Malaysia
Plant Pathology 71 (7), 1594-1605
Abstract: Fig (Ficus carica) is an exotic deciduous plant that is grown worldwide. Fungal diseases pose a major threat to fig plants, affecting their fruit quality and production. This study was conducted to characterize the fungal isolates associated with leaf blight, stem rot and fruit rot of F. carica in Malaysia through morphological analysis, DNA sequencing, multigene phylogenetic analysis and pathogenicity tests. From September 2018 to March 2019, 30 blighted leaves and 30 rotted stems and fruits of F. carica were collected from several nurseries in Malaysia. Thirty fungal isolates that belonged to Lasiodiplodia theobromae (27 isolates) and L. brasiliensis (three isolates) were identified based on morphological characteristics, comparison of DNA sequences and phylogenetic analysis of the internal transcribed spacer (ITS), elongation translation factor 1-α (tef1-α), β-tubulin (tub2) and DNA-directed RNA polymerase II subunit (rpb2). Among the 27 isolates of L. theobromae, nine isolates were obtained from leaves, eight isolates from stems and 10 isolates from fruits, whereas the three isolates of L. brasiliensis were obtained from stems (two isolates) and a leaf (one isolate). The results of pathogenicity tests revealed that L. theobromae and L. brasiliensis isolates were responsible for leaf blight and stem rot of F. carica, whereas fruit rot was caused by L. theobromae isolates. The present study highlighted two different species, L. theobromae and L. brasiliensis, as the causal agents of leaf blight and stem rot of F. carica. Additionally, L. theobromae caused fruit rot of F. carica in Malaysia.
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Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lasiodiplodia theobromae	Ficus (crop)	Malaysia
	Lasiodiplodia brasiliensis	Ficus (crop)	Malaysia