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Feng J, Yuan Q, Chen X, Fang L, Zhang T, Liu Z, Wang Y, Geng X, Cai Q, Li Z. Identification and Chemical Control of Stem Canker Pathogen of Idesia polycarpa. PLANTS (BASEL, SWITZERLAND) 2025; 14:1393. [PMID: 40364422 PMCID: PMC12073612 DOI: 10.3390/plants14091393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2025] [Revised: 04/30/2025] [Accepted: 05/03/2025] [Indexed: 05/15/2025]
Abstract
Idesia polycarpa is an important woody oilseed tree crucial for ensuring China's grain and oil security. The expansion of I. polycarpa plantations has been accompanied by an increase in pests and diseases, with canker disease recently observed in two forests in Henan Province. Field surveys revealed a disease incidence of 70.12% among 328 surveyed trees, indicating a substantial threat to plantation health. The most virulent pathogen, strain SQ5, was identified as Botryosphaeria dothidea through molecular sequencing and morphological analyses. Strain SQ5 showed an optimum growth temperature of 25 °C and a mycelial lethal temperature of 60 °C. The pathogen thrives in acidic conditions and is promoted by light, with the ability to utilize various carbon and nitrogen sources. In vitro toxicity assessments identified four effective fungicides: 70% thiophanate-methyl (EC50 = 0.0169 µg/mL), 43% tebuconazole (EC50 = 0.0219 µg/mL), 20% octylamine acetate (EC50 = 0.0271 µg/mL), and 40% difenoconazole (EC50 = 0.0954 µg/mL). Field trials demonstrated that 43% tebuconazole (average efficacy = 35.29%) and 40% difenoconazole (average efficacy = 23.53%) exhibited superior control of I. polycarpa canker. This study represents the first systematic analysis of I. polycarpa canker and its control measures, laying a foundation for further research and field management strategies. Given the significance of I. polycarpa in Chinese forestry, this underscores the need for effective management strategies to sustain its productivity and mitigate risks associated with expanding plantations.
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Affiliation(s)
- Jian Feng
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
- Key Laboratory for Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Qiupeng Yuan
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Xuzhong Chen
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- Zhongyuan Environmental Protection Development Co., Ltd., Zhengzhou 450046, China
| | - Lisha Fang
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Tao Zhang
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Zhen Liu
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Yanmei Wang
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Xiaodong Geng
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Qifei Cai
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Henan Province Engineering Technology Research Center for Idesia, Zhengzhou 450046, China
| | - Zhi Li
- College of Forestry, Henan Agricultural University, Zhengzhou 450046, China
- National Forestry and Grassland Administration Key Laboratory for Central Plains Forest Resources Cultivation, Zhengzhou 450046, China
- Zhongyuan Environmental Protection Development Co., Ltd., Zhengzhou 450046, China
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Wang H, Wei R, Wei Y, Su J, Xu J, Yao M, Tian D, Zhou H. Identification, characterization, and sensitivity to phytochemicals of a novel Curvularia species associated with leaf spot disease on Curcuma kwangsiensis. Sci Rep 2024; 14:26487. [PMID: 39489803 PMCID: PMC11532394 DOI: 10.1038/s41598-024-77524-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Accepted: 10/23/2024] [Indexed: 11/05/2024] Open
Abstract
A leaf spot disease affecting Curcuma kwangsiensis (Zingiberaceae) has been observed in Qinzhou City, Guangxi Province. Infected leaves exhibit yellow-brown spots that progressively expand and eventually lead to leaf death. Curvularia isolates were obtained from the diseased leaves with tissue isolation and single spore purification methods. To accurately identify these isolates, we analyzed their morphological characteristics and phylogenetic relationships using combinations of ITS, GAPDH, and EF-1α gene sequences. Phylogenetic analysis showed that the investigated strains formed a distinct clade separate from other recognized Curvularia species. Furthermore, the strains exhibited differences in conidiophore size and conidia shape/size. Based on phylogenetic studies, morphology, and pathogenicity tests, the pathogen was identified as a new species named Curvularia qinzhouensis. Optimal conditions for mycelial growth were observed at 30 °C and pH 8. The sensitivity of the pathogen to various phytochemicals was also examined. Honokiol, thymol, and citral demonstrated effective antifungal effects, with EC50 values of 6.72 ± 1.75, 25.74 ± 4.30, and 54.24 ± 4.69 µg/ml, respectively. The present investigation provides the first report of leaf spot disease on C. kwangsiensis caused by C. qinzhouensis, and valuable insights for the prevention and control of this disease.
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Affiliation(s)
- Hanyi Wang
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
- Linnaeus Labs Technology Company Limited, Wuyuan, 333200, China
| | - Rongchang Wei
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, China
| | - Youjing Wei
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
| | - Jiali Su
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
| | - Jiajia Xu
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
| | - Maoxiao Yao
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
| | - Dongna Tian
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China
| | - Hao Zhou
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi Minzu University, Nanning, 530006, China.
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Wu W, Wang G, Li E, Tan S, Xu G, Huang X, Chen H, Liang Y, Li R, Qin J, Yi K. Characterization and Fungicide Sensitivity of Phaeosphaeriopsis obtusispora That Causes Marginal Leaf Blight in Agave hybrid H.11648. J Fungi (Basel) 2024; 10:486. [PMID: 39057370 PMCID: PMC11278330 DOI: 10.3390/jof10070486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 07/28/2024] Open
Abstract
Sisal is an important tropical cash crop in southern China. Unfortunately, it is threatened by various diseases. In 2022, a new disease tentatively named marginal leaf blight disease (MLBD) was first observed in sisal fields across Guangxi and Guangdong provinces, with an incidence rate ranging from 13% to 30%. In this work, to isolate and identify the pathogens causing MLBD, sisal leaves exhibiting the typical MLBD symptoms were collected, and nine strains were obtained. Pathogenicity tests, morphological observations, and phylogenetic analyses confirmed that two strains, namely 22GX1-3 and 22GD1-4, identified as Phaeosphaeriopsis obtusispora, were the causative pathogens of MLBD. Further investigations into the biological characteristics of P. obtusispora showed that its mycelia exhibited optimal growth on PDA medium, with the most favourable temperature and pH being 25 °C and 7.0, respectively. The mycelia could grow in temperatures ranging from 10 °C to 32 °C but ceased at 35 °C. Lactose and yeast extract powder were also identified as the optimal carbon and nitrogen sources, respectively. Additionally, the effectiveness of various control agents was assessed on a single strain, 22GX1-3. Among the twelve fungicides tested, difenoconazole was proven the most effective, with an EC50 value of 0.5045 µg/mL. To our knowledge, this is the first report for sisal MLBD caused by P. obtusispora. Our results provide crucial pieces of information for the development of effective management strategies to control sisal MLBD caused by P. obtusispora.
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Affiliation(s)
- Weihuai Wu
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Guihua Wang
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Erli Li
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Shibei Tan
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Gang Xu
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Xing Huang
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Helong Chen
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Yanqiong Liang
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Rui Li
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
| | - Jianfeng Qin
- Guangxi Subtropical Crops Research Institute, Nanning 530001, China;
| | - Kexian Yi
- Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (G.W.); (S.T.); (G.X.); (H.C.); (Y.L.); (R.L.)
- Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
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Wang H, Chen H, Lin Y, Li M, Liu Q, Lin Y, Jiang X, Chen Y. Insights into the Isolation, Identification, and Biological Characterization Analysis of and Novel Control Strategies for Diaporthe passiflorae in Postharvest Passion Fruit. J Fungi (Basel) 2023; 9:1034. [PMID: 37888288 PMCID: PMC10608467 DOI: 10.3390/jof9101034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/14/2023] [Accepted: 10/15/2023] [Indexed: 10/28/2023] Open
Abstract
Postharvest diseases seriously restrict developments in the passion fruit industry. In this study, we aimed to identify the postharvest pathogen affecting passion fruit, investigate its pathogenicity, and explore relevant control methods. The pathogen was isolated from rotting passion fruit and identified using morphological characteristics, ITS sequences, and phylogenetic tree analyses. Additionally, preliminary studies were conducted to assess the biological characteristics of the pathogen and evaluate the efficacy of various treatments for disease control. The fungus on the passion fruit called B4 was identified as Diaporthe passiflorae. Optimal conditions for mycelial growth were observed at 25-30 °C and pH 5-6, with starch as the carbon source and peptone as the nitrogen source. Infection by D. passiflorae accelerated fruit decay, reduced the h° value of the peel, and increased the peel cell membrane permeability when compared to the control. Notably, treatments with appropriate concentrations of ɛ-poly-l-lysine, salicylic acid, and melatonin showed inhibitory effects on the pathogen's growth in vitro and may thus be potential postharvest treatments for controlling brown rot caused by D. passiflorae in passion fruit. The results provide a scientific basis for the development of strategies to control postharvest decay and extend the storage period of passion fruit.
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Affiliation(s)
- Huiling Wang
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou 362000, China
- Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hongbin Chen
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Yu Lin
- Department of Intelligent Manufacturing, MinXi Vocational and Technical College, Longyan 364021, China
| | - Meiling Li
- Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qingqing Liu
- Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yuzhao Lin
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Xuanjing Jiang
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou 362000, China
| | - Yihui Chen
- Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Cui L, Yang C, Wang Y, Ma T, Cai F, Wei L, Jin M, Osei R, Zhang J, Tang M. Potential of an endophytic bacteria Bacillus amyloliquefaciens 3-5 as biocontrol agent against potato scab. Microb Pathog 2021; 163:105382. [PMID: 34974122 DOI: 10.1016/j.micpath.2021.105382] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 12/20/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022]
Abstract
To obtain a potential biocontrol agent for potato scab, 75 endophytic bacteria were isolated from the healthy potato tubers and strain 3-5 was selected as an optimal antagonistic bacterium against Streptomyces griseoplanus (Streptacidiphilus griseoplanus) causing potato scab. Strain 3-5 was identified as Bacillus amyloliquefaciens based on its morphological characteristics, 16S rDNA and gyrB gene sequence analysis. B. amyloliquefaciens 3-5 has biological functions of indole-3-acetic acid (IAA) production and nitrogen fixation. Polymerase chain reaction (PCR) detection revealed that B. amyloliquefaciens 3-5 had 6 diverse antibacterial substance synthesis genes, named bacD, bacAB, ituD, ituC, sfP and albF, which resulted in the production of bacilysin, iturin, surfactin and subtilosin. Field efficacy evaluation revealed that B. amyloliquefaciens 3-5 (solid fermentation) was successful in controlling potato scab with a 38.90 ± 3.2140% efficiency which is higher than other chemical bactericides except zhongshengmycin·oligosaccharins and kasugamycin·zhongshengmycin. The endophytic bacterium B. amyloliquefaciens 3-5 could be used as a biocontrol agent against potato scab due its control efficacy and environmental safety.
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Affiliation(s)
- Lingxiao Cui
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Chengde Yang
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China.
| | - Yinyu Wang
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Ting Ma
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Fengfeng Cai
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Lijuan Wei
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Mengjun Jin
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Richard Osei
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
| | - Junlian Zhang
- Gansu Key Lab of Crop Improvement & Germplasm Enhancement, Lanzhou, 730070, China
| | - Mei Tang
- Laboratory of Biocontrol Engineering of Crop Pests and Diseases in Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070, China
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