Radish (Raphanus sativus L.), which belongs to Brassicaceae, is widely cultivated throughout China. The 'Shawo' radish renowned for its crispness, sweetness, and juiciness, predominantly as a fruit in Tianjin. In November 2023, black rot on tubers was observed several commercial fields different farms (approximately 10 ha total, with distance of 2-3 km), disease incidence 40%-50% Xiqing District (116.97°E, 39.09°N), Tianjin city, Infected plants were stunted grew yellow leaves, the turned...

Pseudomonas syringae pv. tomato is a seedborne pathogen that causes bacterial speck disease in tomato. P. typically detected seed using quantitative real-time PCR (qPCR) but the inability of qPCR to distinguish between viable and nonviable cells might lead an overestimation cells. In present study, strategy involving propidium monoazide (PMA) pretreatment followed by (PMA-qPCR) assay was developed for quantifying contaminated seed. PMA could selectively bind chromosomal DNA dead and,...

Abstract Biocontrol microorganisms are important tools for the control of root knot nematodes ( Meloidogyne spp.). Endophytic fungi have shown great potential as biocontrol agents in such applications. We here isolated an endophytic fungus from tomato galls infected with M. incognita and identified isolate Acremonium sclerotigenum based on morphology internal transcribed spacer sequence. The this was evaluated both vitro vivo. Specifically, analyses were conducted to determine A. increase...

Abstract During September 2010, Abutilon megapotamicum plants with dark‐brown concentric spots on leaves were observed in a commercial glasshouse located Beijing, China. This study was carried out to identify the causal agent of this disease based Koch's postulates and morphological characteristics. Pathogenicity tests showed that Myrothecium roridum Tode ex Fr. caused leaf spot A. plants, which same as those naturally infected field. Moreover, confirm pathogen species, rDNA internal...

Abstract A new severe disease on nthurium andraeanum Lind. was observed in the summer of 2011 B eijing, C hina. The fungus isolated from symptomatic leaves, and its pathogenicity confirmed. Based morphological characteristics molecular analysis, pathogen identified as M yrothecium roridum Tode ex Fr. This is first report . causing leaf spot

Shine muscat is a Vitis vinifera hybrid (Akitsu-21 × Hakunan), that has emerged as popular table grape cultivar in China. In recent years, shine been widely cultivated with 66,667 ha being 2021. November 2021, symptoms of fruit spot were observed on during the storage at 0~3℃ and 85%~90% RH, while stored National Agricultural Product Preservation Engineering Technology Research Center, Tianjin (N 116°20', E 39°09'), The incidence this disease was about 35%. Affected berries initially had...

Zantedeschia aethiopica (L.) Spreng. (calla lily), belonging to family Araceae, is a popular ornamental plant in China. In the summer of 2010, leaves calla lily with typical symptoms necrotic lesions were observed commercial glasshouse Beijing, China (116°20' E, 39°44' N). The initial circular subcircular, 1 3 mm, and dark brown on leaf lamina. Under high humidity, expanded rapidly 5 10 mm distinct concentric zones produced black sporodochia, especially backs leaves. Later, infected...

Watermelon (Citrullus lanatus) is an important cucurbit crop in China. During September 2020, unknown leaf spot disease was observed on watermelon two greenhouses (640m2 per greenhouse) of Sangzi town, Jizhou district, Tianjin, China (117°10'E, 39°55'N), where approximately 10% plants were infected. Disease symptoms began as small, circular, brown spots leaves. As these increased size, they developed confluent, irregular lesions surrounded by dark edges. Severely affected had many wilted...

Paramyrothecium foliicola is a species of ascomycete in the family Stachybotryaceae. In recent years, it has been reported as threat to crop production different countries. Because its wide host range and high virulence, this pathogen may present major global concern near future. Despite importance, there no sufficient genomic information for P. foliicola. Our work introduces initial PacBio-Illumina hybrid draft genome TJWQPF1, strain, together with related annotations. This was assembled...

Alocasia macrorrhizos (Linnaeus) G. Don is a perennial herb in the Araceae family. It native to South Asia and Asia-Pacific has long been cultivated as it an economically important medicinal ornamental plant. During July 2012 2013, severe outbreaks of leaf spot stem rot disease on this plant occurred greenhouse Shunyi district, Beijing, China (117°05'E, 40°13'N). The incidence was greater than 30%. spots first appeared yellow dots. As lesions expanded, symptoms were circular subcircular,...

Jasminum sambac (Linnaeus) Aiton belonging to Oleaceae family, has been cultivated in China over 1500 years. It is an important tea crop South China, and popular ornamental plant North China. In June 2015, Corynespora leaf spot on was first observed Caozhuang Tianjin(E: 117°20', N: 39°13'). a series of investigations, the disease incidence Tianjin found be as high 20%. The also flower planting greenhouses Beijing Hebei region. initial symptoms appeared small circular with gray white center...

Leaf mustard (Brassica juncea [L.] Czern. et Coss.) belongs to Brassicaceae and is an important leaf vegetable widely cultivated in the Yangtze River basin various southern provinces China. In August 2023, rhizome decay symptoms were observed at stem base of plants (cv. Huarong) field Changde City (29.05 °N; 111.59 °E), Hunan Province, The incidence symptomatic was approximately 30% several fields (2 ha total). Brown water-soaked appeared outer leaves, hollow rot stem, accompanied by a fishy...

HomePlant DiseaseVol. 106, No. 5Identification of Leaf Spot and Stem Rot on Plectranthus verticillatus Caused by Rhizoctonia solani AG-4 HGI in China PreviousNext DISEASE NOTE OPENOpen Access licenseIdentification ChinaHaiyan Ben, Yurong Yao, Chengze Song, Hongyun Qu, Wei Gao, Jianfei Huo, Xueyan Zhang, Yongjuan Hao, Wanli Wang, Li HongHaiyan Benhttps://orcid.org/0000-0003-3506-172XInstitute Plant Protection, Tianjin Academy Agricultural Sciences, Tianjin, 300384, China, YaoInstitute...