Myrothecium roridum and M. verrucaria are two plant pathogenic species causing foliar spots in a large number of cultivated plants. This paper aims to study the causal agents of foliar spots in vegetable crops (sweet pepper, tomato, cucumber), ornamental plants (Spathiphyllum, Solidago canadensis, Anthurium, Dieffenbachia) and a solanaceous weed plant (Nicandra physalodes). Most of the isolates were identified as M. roridum; only the isolate 'Myr-02' from S. canadensis was identified as M. verrucaria. All the isolates were pathogenic to their original plant hosts and also to some other plants. Some fungicides were tested in vitro against an isolate of M. roridum and the mycelial growth recorded after seven days. Fungicides with quartenary ammonium, Tebuconzole and copper were highly effective in inhibiting the mycelial growth of M. roridum. This paper confirms the first record of M. roridum causing leaf spots in sweet pepper, tomato, Spathiphyllum, Anthurium, Dieffenbachia and N. physalodes. We also report M. roridum as causal agent of cucumber fruit rot and also M. verrucaria in tango plants.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768628 | PMC |
| http://dx.doi.org/10.1590/S1517-838220100001000034 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Is a New Host of Associated with Leaf Spot Disease in China.
Plant Dis
October 2024
Anhui Academy of Agricultural Sciences, Plant Protection and Agro-Products Safety, 40 Nongke South Road, Hefei, Anhui, China, 230031;
Article Synopsis
- A new leaf spot disease affecting Stevia rebaudiana was reported in Hongxing county, Anhui province, with symptoms including dark brown leaf spots, foliar wilting, and occasional plant death, impacting 10-15% of the plants in three nursery beds.
- To identify the pathogen, diseased leaves were sterilized and cultured, resulting in twenty-five Stagonosporopsis-like isolates characterized by gray-green, cottony colonies and a growth rate of 9.5 mm/day.
- Molecular identification of two representative isolates was performed using various gene sequences, which were submitted to GenBank, revealing a 99% similarity to known sequences.
Emergence of watermelon chlorotic stunt virus in melon and watermelon in the southwestern United States.
Plant Dis
October 2024
University of Arizona-Yuma Agricultural Center, Entomology, Umniversity of Arizona, Yuma AG Center, Yuma, Arizona, United States, 85364;
Article Synopsis
- In the fall of 2023, watermelon and melon plants in Yuma County, AZ, and Imperial County, CA, showed mosaic symptoms, chlorotic spotting, and yellowing of older leaves, indicating potential viral infections commonly transmitted by whiteflies.
- Testing identified that most plants were infected with cucurbit yellow stunting disorder virus (CYSDV), prevalent since 2006, but unusual symptoms suggested the presence of another virus.
- Further analysis found watermelon chlorotic stunt virus (WmCSV) in symptomatic plants, with genetic sequencing revealing high similarity to WmCSV isolates from production areas in Mexico and Palestine.
First Report of Leaf Blight of Caused by in China.
Plant Dis
September 2024
Tianjin Agriculture University, College of Horticulture and Landscape, College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 5 300392, China, Tianjin, China, 300392;
Article Synopsis
- A new leaf disease was found on a popular landscaping plant called Syringa oblata in Tianjin, China, in September 2023.
- The disease causes yellow-brown spots on the leaves that can lead to wilting, which affects the plant's ability to make food through photosynthesis.
- Scientists are trying to find out what causes this disease by studying infected leaves in a lab, growing the fungus on special dishes, and checking its DNA for identification.
First Report of Causing Leaf Spot on in China.
Plant Dis
August 2024
College of Agriculture, Guizhou University, Guiyang, Guizhou, ChinaGuiyang, Guizhou Province, China, 550025;
Article Synopsis
- Chinese prickly ash (Zanthoxylum bungeanum) is a valuable plant in China, known for its flavor and economic significance, with the largest cultivation area globally.
- In June 2023, a leaf spot disease affecting around 30% of Z. bungeanum was reported in Guizhou Province, characterized by irregular lesions that caused leaf drop.
- Pathogen isolation revealed it to be Curvularia trifolii through morphological examination and genetic analysis, with sequences deposited in GenBank showing high similarity to known strains.
First report of leaf spot caused by on in Hawai'i, USA.
Plant Dis
August 2024
USDA-ARS Daniel K Inouye US Pacific Basin Agricultural Research Center, Tropical Plant Genetic Resources and Disease Research Unit, Hilo, Hawaii, United States;
Article Synopsis
- - During the 2022-2023 season, the coffee crop in Hawai'i was valued at $57.1 million, with symptoms of a foliar disease identified in the Kona Typica variety, showing circular, necrotic spots and leaf drop.
- - The disease was linked to a fungus identified through a process involving symptom observation, tissue culture, and genetic analysis, confirming it as *(Tode) L. Lombard & Crous*.
- - To test the pathogenicity of the fungus, researchers inoculated Kona Typica seedlings with a concentrated suspension of fungal spores, aiming to study the effects on plant health.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!