Diplodia seriata (grapevine trunk disease).

2021 ◽  
Author(s):  
Robert Reeder
Keyword(s):  
Short Distance ◽  
Ornamental Plants ◽  
Fungal Species ◽  
Host Tissue ◽  
Fruit Rot ◽  
Diplodia Seriata ◽  
Widespread Distribution ◽  
Crop Varieties ◽  
Storage Rots ◽  
Direct Penetration

Abstract Diplodia seriata is a cosmopolitan and plurivorous fungal species occurring on woody hosts belonging to many plant genera and families (Punithalingam and Waller, 1973; Phillips et al., 2007; Slippers et al., 2007). The fungus is encountered in many habitats, but has a primarily temperate distribution and is present on most continents. D. seriata causes canker, dieback, fruit rot and leaf spot diseases on economically important forest and horticultural species (Farr and Rossman, 2020). Reports of the virulence of this pathogen vary depending upon the crop, varieties and hosts involved and it is often regarded as a stress-related pathogen taking advantage of weak or stressed plants. In common with other members of the Botryosphaeriaceae, D. seriata is capable of living endophytically inside plants (Crous et al., 2006; Slippers and Wingfield, 2007) and latent infections of fruits can result in storage rots. The pathogen is dispersed through both pycnidia and ascospores with conidia regarded as the most important inoculum source for short-distance spread. Infection is through wounds, natural openings, or direct penetration of the host tissue. There is no evidence that this species is seedborne although some members of the Botryosphaeriaceae have been shown to be present in seeds (Gure et al., 2005). The extensive host range of this species means that it is more likely to become established in new areas, as establishment will not depend on the presence of specific hosts. The widespread distribution of this species is presumably as a result of the word-wide movement agricultural, forestry and ornamental plants.

scholarly journals Diplodia seriata (grapevine trunk disease).

2021 ◽  
Author(s):  
Robert Reeder
Keyword(s):  
Short Distance ◽  
Ornamental Plants ◽  
Fungal Species ◽  
Host Tissue ◽  
Fruit Rot ◽  
Diplodia Seriata ◽  
Widespread Distribution ◽  
Crop Varieties ◽  
Storage Rots ◽  
Direct Penetration

Abstract Diplodia seriata is a cosmopolitan and plurivorous fungal species occurring on woody hosts belonging to many plant genera and families (Punithalingam and Waller, 1973; Phillips et al., 2007; Slippers et al., 2007). The fungus is encountered in many habitats, but has a primarily temperate distribution and is present on most continents.D. seriata causes canker, dieback, fruit rot and leaf spot diseases on economically important forest and horticultural species (Farr and Rossman, 2020). Reports of the virulence of this pathogen vary depending upon the crop, varieties and hosts involved and it is often regarded as a stress-related pathogen taking advantage of weak or stressed plants. In common with other members of the Botryosphaeriaceae, D. seriata is capable of living endophytically inside plants (Crous et al., 2006; Slippers and Wingfield, 2007) and latent infections of fruits can result in storage rots. The pathogen is dispersed through both pycnidia and ascospores with conidia regarded as the most important inoculum source for short-distance spread. Infection is through wounds, natural openings, or direct penetration of the host tissue. There is no evidence that this species is seedborne although some members of the Botryosphaeriaceae have been shown to be present in seeds (Gure et al., 2005). The extensive host range of this species means that it is more likely to become established in new areas, as establishment will not depend on the presence of specific hosts. The widespread distribution of this species is presumably as a result of the word-wide movement agricultural, forestry and ornamental plants.

scholarly journals Distribution of stem-end rot on the canopy in ‘Hass’ avocado trees in two coastal areas in Peru

2021 ◽  
Vol 5 (2) ◽  
pp. 60-70
Author(s):  
Alejandro Kepler Llanos Melo ◽  
Walter Eduardo Apaza-Tapia
Keyword(s):  
Disease Incidence ◽  
Management Strategies ◽  
Elongation Factor ◽  
Fungal Species ◽  
Coastal Areas ◽  
Tree Canopy ◽  
Fruit Rot ◽  
Internal Site ◽  
External Site ◽  
Hass Avocado

Stem-end rot (SER) of avocado is caused by several fungal species, and it is presented worldwide. This plant disease currently affects several avocado producer regions in Peru, causing fruit rot, impacting the industry negatively. Research about SER distribution in the canopy of avocado trees is limited. Thus, the present study aimed to compare which areas in the canopy are prone to have more SER in ‘Hass’ avocado harvested fruit in two different coastal areas in Peru. The experiment was conducted in the northern (Barranca) and southern (Cañete) of Lima. ‘Hass’Avocado fruits from both producer areas were collected to identify the causal agent; Lasiodiplodia theobromae was isolated from infected fruits. Identification was conducted based on morphological features and a partial DNA sequence of the translation elongation factor 1-α gene (tef1-α). The results showed that fruits inside the tree canopy were prone to have a higher disease incidence than the fruits located in the external site (P<0.001). Besides, internal-site fruits displayed a higher percentage of infected fruit for each grade disease (P<0.001) than external-site fruits, except for grade 0 (fruits without symptoms) and grade 1. Finally, the results suggested that the altitude where the fruit is positioned on the canopy could influence the incidence of SER, where fruits located in the high part revealed less incidence than the low section. The results are valuable for enhancing management strategies and avoiding postharvest loss of avocado fruits in our region.

First report of Diplodia seriata causing fruit rot of loquat in Pakistan

2018 ◽  
Vol 100 (2) ◽  
pp. 325-325
Author(s):  
Muhammad Fahim Abbas ◽  
Farah Naz
Keyword(s):  
Fruit Rot ◽  
Diplodia Seriata ◽  
First Report

scholarly journals An Emerging Pathogen from Rotted Chestnut in China: Gnomoniopsis daii sp. nov.

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 1016 ◽  
Author(s):  
Ning Jiang ◽  
Chengming Tian
Keyword(s):  
Internal Transcribed Spacer ◽  
Phylogenetic Analyses ◽  
Brown Rot ◽  
Fungal Species ◽  
Fruit Rot ◽  
Economic Viability ◽  
Emerging Pathogen ◽  
Morphological Comparison ◽  
Sweet Chestnut ◽  
Rot Disease

Nut quality is fundamental to the economic viability of the Chinese sweet chestnut industry, but fruit rot disease significantly reduces this quality. In this study, we investigated chestnut rot in Anhui and Hubei provinces in China. Typical brown rot symptoms were observed, affecting nuts from different plantations. Isolates were obtained from symptomatic tissues of rotted fruits that were identified based on morphological comparison and phylogenetic analyses of partial internal transcribed spacer (ITS), and tef1 and tub2 gene sequences. The inoculation results showed that the tested fungal species is pathogenic to chestnut fruits. Hence, a new and severe pathogen that causes Chinese sweet chestnut brown rot, Gnomoniopsis daii sp. nov., is introduced herein.

scholarly journals Identification and diversity of Fusarium species isolated from tomato fruits

2016 ◽  
Vol 56 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Nur Baiti Abd Murad ◽  
Nor Azizah Kusai ◽  
Nur Ain Izzati Mohd Zainudin
Keyword(s):  
Fusarium Species ◽  
Elongation Factor ◽  
Fungal Species ◽  
Fruit Rot ◽  
Gene Encoding ◽  
Translation Elongation ◽  
Additional Information ◽  
Rot Disease ◽  
Serious Disease ◽  
Elongation Factor 1

Abstract Fruit rot of tomato is a serious disease caused by Fusarium species. Sampling was conducted throughout Selangor, Malaysia and fungal species identification was conducted based on morphological and gene encoding translation elongation factor 1-α (tef1-α) sequence analysis. Five species of Fusarium were discovered namely F. oxysporum (including F. oxysporum f. sp. lycopersici), F. solani, F. equiseti, F. proliferatum and F. verticillioides. Our results provide additional information regarding the diversity of Fusarium species associated with fruit rot disease of tomato.

scholarly journals A Photographic Diagnostic Guide for Identification of the Principal Cranberry Fruit Rot Pathogens

2013 ◽  
Vol 14 (1) ◽  
pp. 34 ◽  
Author(s):  
Lindsay D. Wells ◽  
Patricia S. McManus
Keyword(s):  
Fungal Species ◽  
Fruit Rot ◽  
Economic Losses ◽  
Disease Complex ◽  
Identification Guide ◽  
Rot Disease

Many fungal species contribute to the cranberry fruit rot disease complex, the most devastating disease problem of cranberry crops, but the most significant economic losses can be attributed to a subset of five to seven species. Identifying these pathogens requires rotten cranberries to be culture on different microbiological media, where colony appearance differs. The objective of this report is to provide a photographic identification guide for each of the eight principal fruit rot pathogens when grown on different microbiological media. Accepted for publication 17 April 2013. Published 29 July 2013.

scholarly journals Parasitic fungi of ornamental plants and herbs of Szczecin

2013 ◽  
Vol 55 (1) ◽  
pp. 7-15
Author(s):  
Iwona Adamska
Keyword(s):  
Plant Species ◽  
Ornamental Plants ◽  
Fungal Species ◽  
Aesculus Hippocastanum ◽  
Parasitic Fungi ◽  
The Family

In the years 2000-2001, the occurrence of fungi parasitizing on ornamental plants and herbs cultivated in the Vegetative Hall of the Agricultural University in Szczecin was investigated. The plants represented ca. 200 species. Disease and etiological symptoms were found in 37% of plant species. Most diseased plants came from the family Asteraceae. The plant species most frequently affected was <i>Melisa officinalis</i>. In the laboratory, 35 fungal species were recognized. Most fungi came from the phylum <i>Ascomycota</i> (13 species), and least from the phylum <i>Oomycota</i> (3 species). The phylum <i>Ascomycota</i> was represented only by species of the order <i>Erysiphales</i>. Other relatively frequently found fungi also were members of the phylum <i>Basidiomycota</i> (11 species). Of the fungi recognized, 31 species were earlier frequently recorded in Poland, and three rarely. <i>Erysiphe flexuosa</i> parasitizing <i>Aesculus hippocastanum</i> was not recorded in Poland to date; in Europe this fungus was recognized only in Germany and Switzerland.

scholarly journals Effect of Deadwood on Ectomycorrhizal Colonisation of Old-Growth Oak Forests

Forests ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 480 ◽  
Author(s):  
Jacek Olchowik ◽  
Dorota Hilszczańska ◽  
Roman Mariusz Bzdyk ◽  
Marcin Studnicki ◽  
Tadeusz Malewski ◽  
...  
Keyword(s):  
Species Composition ◽  
Ectomycorrhizal Fungi ◽  
Coarse Woody Debris ◽  
Short Distance ◽  
Woody Debris ◽  
Fungal Species ◽  
Root Tips ◽  
Soil C ◽  
Soil Features ◽  
Exploration Types

Although the importance of coarse woody debris (CWD) for species diversity is recognized, the effects of coarse woody debris decay class on species composition have received little attention. We examined how the species composition of ectomycorrhizal fungi (ECM) changes with CWD decay. We describe ectomycorrhizal root tips and the diversity of mycorrhizal fungal species at three English oak (Quercus robur L.) sites. DNA barcoding revealed a total of 17 ECM fungal species. The highest degree of mycorrhizal colonization was found in CWDadvanced (27.2%) and CWDearly (27.1%). Based on exploration types, ectomycorrhizae were classified with respect to ecologically relevant soil features. The short distance type was significantly correlated with soil P2O5, while the contact type was correlated with soil C/N. The lowest mean content of soil Corg was found in the CWDabsent site. The difference in total soil N between sites decreased with increasing CWD decomposition, whereas total C/N increased correspondingly. In this study we confirmed that soil CWD stimulates ectomycorrhizal fungi, representing contact or short-distance exploration types of mycelium.

Sign in / Sign up

Export Citation Format

Share Document