Pestalotiopsis microspora causes leaf spot on Adenium obesum

Abstract

The cultivation and sale of ornamental plants are dynamic and promising sectors of agribusiness, with some of the highest profitability per cultivated area (Serviço Brasileiro de Apoio às Micro E Pequenas Empresas, 2015). In 2014, the Brazilian supply chain for these plants consisted of 8,248 producers with an average planted area of 1.82 hectares and more than 2,000 species, divided into three main categories: Cut flowers and foliage, potted plants and flowers, and ornamental plants for landscaping (except grass) (Lima Júnior et al., 2015).The cultivation and sale of potted plants and flowers have increased their socioeconomic importance in the country, with desert rose (Adenium spp.) gaining prominence due to its drought resistance, easy maintenance, and the variety of colours and shapes of its flowers, which are generally abundant and long lasting (Oyen, 2006;Varella et al., 2015). Desert rose [Adenium obesum (Forssk.), Roem.

Study of Fungal Diseases of Ornamental Plants of Sherubtse College Campus, Kanglung

“…was not reported in literatures, however, it was reported from other ornamental plants. Remlein-starosta, (2004) (Mukhtar et al, 2019) Pestalotiopsis microspora on Lindera obtusiloba in Korea (Jeon et al, 2007) and on Adenium obesum in Brazil (Jesus et al, 2022).…”

Pest categorisation of Pestalotiopsis microspora

“…Pestalotiopsis microspora can cause symptoms on several parts of its host plants. However, it affects mainly the leaves, causing leaf spot (De Jesus et al., 2022 ; Herliyana et al., 2022 ; Shen et al., 2014 ; Yuan et al., 2022 ) and leaf blight (Bhuiyan et al., 2022 ; Herliyana et al., 2022 ; Jeon et al., 2007 ; Jeon & Cheon, 2014 ; Ngobisa et al., 2018 ; Wu et al., 2009 ; Xiao et al., 2016 ; Zhong Jiu et al., 2010 ). It can affect roots, causing root rot (Lu et al., 2016 ), but also fruits, causing fruit spots (Chuanqing et al., 2010 ; Shi et al., 2015 ), scabby fruit canker (Keith et al., 2006 ) and pre‐ (Sultana et al., 2021 ) and post‐harvest fruit rot (Chen, Chen, et al., 2016 ; Li et al., 2016 ), and to a lesser extent twigs, causing twig blight (Ren et al., 2021 ).…”

“…Typical cultural and morphological characteristics of P. microspora growing in potato dextrose agar medium include greyish to white zonate and cottony colonies, that become later yellowish as fungal age increases, with coloured small acervular conidiomata (de Jesus et al., 2022 ; Jeon et al., 2007 ; Keith et al., 2006 ). In culture, the fungus has a brown to hyaline branched septate hyphae (Strobel et al., 1996 ).…”

“…The molecular techniques available for the identification of P. microspora are mostly based on the sequencing of the internal transcribed spacers (ITS) of genomic rDNA, in particular the region ITS1–5.8S–ITS2 (Bhuiyan et al., 2022 ; De Jesus et al., 2022 ; Herliyana et al., 2022 ; Jeon et al., 2007 ; Jeon & Cheon, 2014 ; Lu et al., 2016 ; Shi et al., 2015 ; Xiao et al., 2016 ; Zhong Jiu et al., 2010 ). Other DNA regions, such as the protein‐coding gene beta‐tubulin ( tub2 ), have been used together with the ITS for a more reliable identification of P. microspora (Li et al., 2016 ; Yuan et al., 2022 ).…”

Preliminary analysis and validation of the functions associated with two related genes during Beta-Aminobutyric acid induced resistance in blueberry against to leaf spot

“…Some fungi in this genus are important pathogenic of plants, which cause many kinds of plant diseases and have a wide distribution range. The main symptoms of infected plants are leaf spot, rot and ulcer, which bring serious loss to production (Guo, 2006;Kumar D,2014;Die et al, 2021;Jin et al, 2021;Jesus et al, 2022). BABA is a secondary metabolized non-protein amino acid isolated from tomato roots after exposure to the sun.…”