Volume 8 - Issue 1


Article Number 1
Title

Isolation of Calonectria sulawesiensis from soil in Thailand and its pathogenicity against Eucalyptus camaldulensis

Authors

Jessadarom H, Phetruang W, Haitook S, Cheewangkoon R

Received 20 December 2017
Accepted 05 January 2018
Published Online 12 January 2018
Corresponding Author R. Cheewangkoon
Abstract

Calonectria species are abundant and widely distributed in tropical and subtropical countries. In our survey four isolates of Calonectria sulawesiensis were isolated from soil collected in Chiang Mai Province, Thailand. The identification was based on morphological characteristics and the phylogenetic analyses of translation elongation factor 1-alpha gene (tef1-α) regions. This is the first report of this fungus in Thailand. In vitro pathogenicity showed Ca. sulawesiensis activity against eucalyptus.

Keywords Cylindrocladium – pathogenicity
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Article Number 2
Title

Phyllosticta capitalensis sporulating on ginkgo leaves in Taiwan

Authors

Kirschner R

Received 24 November 2017
Accepted 04 January 2018
Published Online 19 January 2018
Corresponding Author R. Kirschner
Abstract

Formation of pycnidia by Phyllosticta capitalensis on living and dead leaves of Ginkgo biloba is recorded for the first time, based on morphology and the internal transcribed spacer sequence (ITS) of the ribosomal RNA gene of samples from Taiwan. Although the fungus is recorded as a widespread endophyte and weak pathogen from numerous plants, on ginkgo it has hitherto only been known as an endophyte in Japan. Phyllosticta capitalensis is the single verified Phyllosticta species on this host. Another fungus from ginkgo, the invalidly published Pseudocercospora ginkgoana is validated here.

Keywords Botryosphaeriales – Diaporthe – Guignardia – Phoma – plant pathogen
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Article Number 3
Title

First record of Leptoxyphium madagascariense (Dothideomycetes, Capnodiales) from sugarcane juice

Authors

Abdel-Sater MA, Moubasher AH, Soliman Z

Received 15 December 2017
Accepted 04 January 2018
Published Online 26 January 2018
Corresponding Author M.A. Abdel-Sater
Abstract

During surveys of mycobiota of fresh juices in Assiut area, Egypt, a synnematous dark fungus was isolated from sugarcane juice on malt extract yeast extract 50% glucose agar, MY50G. Critical phenotypic and ITS sequencing revealed its relatedness to Leptoxyphium madagascariense (99.42% sequence similarity with Genbank accession nos. NR_137731 & GQ303277 of the type strain CBS124766T). The strain was deposited at Assiut University Mycological Centre and its ITS sequence was deposited at the National Centre for Biotechnology Information, NCBI. This species is recorded for only the second time after its original description from trees in a tropical rain forest of Madagascar

Keywords Egypt – ITS sequencing – phenotypic features – sooty moulds – synnemata
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Article Number 4
Title

Growth responses of okra (Abelmoschus esculentus) to inoculation with Trichoderma viride, mancozeb and Sclerotium rolfsii in sterile and non-sterile soils

Authors

Ekundayo EA, Ekundayo FO, Osibote IA, Boboye BE, Adetuyi FC

Received 14 February 2017
Accepted 26 September 2017
Published Online 26 January 2018
Corresponding Author A. Ekundayo
Abstract

Okra (Abelmoschus esculentum) is an annual vegetable that is cultivated in the tropics and subtropics. Infestation by Sclerotium rolfsii can cause serious economic losses to farmers. Therefore, the curative effect of Trichoderma viride and mancozeb on S. rolfsii on okra plants was monitored in the green house in both non-sterile and sterile soils. Okra cultivated in non-sterile soils were healthier and stronger than those in sterile soils although plants were taller in sterile soil. Generally, the fresh weight of okra leaf, root and stem were higher in non-sterile soil than in sterile soil. The fruit yields of okra in non-sterile soil were higher than those of the sterile soil, irrespective of the treatments. Based on the results of this investigation, it is not recommended to use sterile soil if one is interested in yield of the plant.

Keywords mancozeb – okra plants – Sclerotium rolfsii – Trichoderma viride
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About Plant Pathology & Quarantine

Plant Pathology & Quarantine Online publishes reviews, research articles, methodology papers, taxonomic works such as monographs, and checklists which are relevant toplant pathology and quarantine. The official journal language is English.

 

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