Journal of Phytopathology最新文献

{"title":"First Report of Potato Spindle Tuber Viroid in Vegetative Capsicum annum and Its Effect on Host Metabolites","authors":"Zaryab Khalid Sial,&nbsp;Shabnum Shaheen,&nbsp;Riffat Siddique,&nbsp;Modhi O. Alotaibi,&nbsp;Sana Khalid,&nbsp;Romisha Sonia,&nbsp;Sayyara Ibadullayeva,&nbsp;Muhammad Zafar,&nbsp;Anwer Usma,&nbsp;Javid Ojaghi","doi":"10.1111/jph.70122","DOIUrl":"https://doi.org/10.1111/jph.70122","url":null,"abstract":"<div>\u0000 \u0000 <p>In recent years, Potato spindle tuber viroid (PSTVd), a member of the genus Pospiviroid, has been increasingly detected in a wide range of vegetatively propagated and ornamental plant species. This pilot study was conducted to detect the presence of PSTVd in <i>Capsicum annuum</i> L. (chilli) plants and to analyse the volatile organic compounds (VOCs) emitted by infected plants using gas chromatography–mass spectrometry (GC–MS). Field surveys were carried out in various nurseries located in Pattoki, District Kasur, Pakistan, to identify symptomatic chilli plants exhibiting leaf curling, yellowing and spindle-shaped deformities. Suspected samples were collected from multiple nursery sites, encompassing a range of developmental stages from recently grafted seedlings to fruit-bearing plants. For molecular diagnostics, a modified Trizol-based RNA extraction protocol was employed to enhance efficiency and conserve reagents. Total RNA from symptomatic leaves was reverse transcribed to cDNA and subjected to sequencing. Sequence analysis revealed that 75 out of 100 samples exhibited up to 99% sequence similarity with known PSTVd isolates in GenBank, with the predominant local isolate submitted under accession number MK977647. Comparative analysis suggests that the introduction and spread of PSTVd in chilli crops may be associated with proximity to infected ornamental species (e.g., MN055490) and Solanaceous crops such as potato and tomato. As far as we are aware, this study provides the first documented evidence of PSTVd infection in chilli plants in Pakistan. These findings underscore the necessity for continued surveillance and the development of integrated management strategies to mitigate the spread of this economically significant viroid in vegetatively propagated crops.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Report of Colletotrichum nymphaeae Causing Leaf Spot on Polygonatum kingianum in China","authors":"Yanqiu Qin,&nbsp;Lina Wei,&nbsp;Xiaojuan Wei,&nbsp;Xiaoshan Zhou,&nbsp;Yi Li,&nbsp;Shunjiang Chen,&nbsp;Zhiping Zhang","doi":"10.1111/jph.70114","DOIUrl":"https://doi.org/10.1111/jph.70114","url":null,"abstract":"<div>\u0000 \u0000 <p>Huang-jing (<i>Polygonatum kingianum</i>), an important herb in traditional Chinese medicine, is susceptible to anthracnose, a destructive foliar disease caused by <i>Colletotrichum</i> spp. In September 2020, irregular brown leaf spots were observed on <i>P. kingianum</i> plants in Yunnan Province, China. A <i>Colletotrichum</i> isolate was identified from the infected leaves, and its morphological features matched <i>Colletotrichum nymphaeae</i>. The fungus was further confirmed using molecular techniques, with gene sequences showing 99.27% to 100% homology to known <i>C. nymphaeae</i> strains. A pathogenicity test demonstrated that the fungus caused anthracnose symptoms in plants. This study represents the first report of <i>C. nymphaeae</i> causing anthracnose in <i>P. kingianum</i> in China, providing essential baseline data to inform future development of disease management strategies for this medicinal species.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interspecific Hybridization for Enhancing Wilt Resistance in Cotton: A Genetic Approach Against Verticillium and Fusarium Wilts","authors":"Gulnoza K. Toshpulatova,&nbsp;Sayfulla G. Boboyev,&nbsp;Muhammad Zafar,&nbsp;Salman Majeed,&nbsp;Ahmed Noureldeen,&nbsp;Motirh Al-Mutairi,&nbsp;Salman Aloufi,&nbsp;Mohammed Alqurashi,&nbsp;Trobjon Makhkamov,&nbsp;Muhammad Rizwan Khan,&nbsp;Fakhr ul Islam,&nbsp;Jonida Biturku","doi":"10.1111/jph.70109","DOIUrl":"https://doi.org/10.1111/jph.70109","url":null,"abstract":"<div>\u0000 \u0000 <p>Soil-borne pathogens, particularly <i>Verticillium dahliae</i> and <i>Fusarium oxysporum</i> f. sp. <i>vasinfectum</i> (FOV), represent a major constraint to global cotton (<i>Gossypium</i> spp.) production by inducing devastating wilt diseases. This study aimed to enhance cotton's resistance to these pathogens through intergenomic hybridization. Utilising elite cultivars (<i>Gossypium hirsutum</i> cv. Omad, <i>G. barbadense</i> cv. Termez-31) and the amphidiploid K-28, wild Gossypium germplasm (<i>G. thurberi</i>, <i>G. raimondii</i>) were introgressed into cultivated cotton to develop tetraploid (4×) and pentaploid (5×) hybrids. Resistance was evaluated through standardised inoculation under both controlled and field conditions (2022–2024). Key findings demonstrated that backcross progenies K-28 × Omad (O-117-125/18 and O-87-91/18) exhibited the highest resistance, with total infection rates of 10.5% and severe symptom rates of 2.5%–3.5%, significantly outperforming the control variety C-4727 (36.8% total infection). Notably, lines SP-1303 and T-1379 displayed broad-spectrum resistance against all five <i>V. dahliae</i> races, underscoring the efficacy of wild-species-derived resistance genes. The persistence of susceptibility in hybrids carrying the wilt-prone parent C-4727 (e.g., O-132-141/18: 29.5% infection) highlighted the crucial role of parental genotype selection. C-4727 is a high-yielding but Fusarium and Verticillium wilt-susceptible <i>G. hirsutum</i> cultivar, which has been widely used in breeding programs due to its agronomic potential despite its vulnerability to vascular wilt pathogens. Statistical analyses confirmed the dominance and heritability of resistance traits in introgressive lines, with low coefficients of variation (CV), which represent the ratio of the standard deviation to the mean (expressed as a percentage), ranging from 10.2% to 27.8%. This study establishes intergenomic hybridization as an effective breeding strategy for introgressing wilt resistance from wild <i>Gossypium</i> species into cultivated cotton. Resistant hybrids, particularly those incorporating the amphidiploid K-28, offer promising avenues for future breeding programs aimed at improving cotton's resilience against soil-borne pathogens.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Report of Colletotrichum atlanticum Associated With Anthracnose of Torch Ginger (Etlingera elatior) in Southern Thailand","authors":"Dusit Athinuwat,&nbsp;Nakarin Suwannarach,&nbsp;Jaturong Kumla,&nbsp;Prisana Wonglom,&nbsp;Anurag Sunpapao","doi":"10.1111/jph.70117","DOIUrl":"https://doi.org/10.1111/jph.70117","url":null,"abstract":"<div>\u0000 \u0000 <p>Torch ginger (<i>Etlingera elatior</i>), a herbaceous plant in the family Zingiberaceae, is commonly cultivated in the tropical climate of southern Thailand. However, its cultivation faces significant challenges from anthracnose, a destructive disease caused by the <i>Colletotrichum</i> genus. This study aimed to identify and characterise <i>Colletotrichum</i> species associated with anthracnose on torch ginger. Field surveys were conducted in a major torch ginger-growing area in Phatthalung Province, southern Thailand, and symptomatic flower samples were collected for pathogen isolation and identification. Fungal isolates were subjected to pathogenicity tests, revealing that five isolates—EeR01.1, EeR01.2, EeR02.1, EeR02.2 and EeW01—caused symptoms similar to those observed in natural infections. The fungi were re-isolated, and their morphological characteristics matched those of <i>Colletotrichum</i>. Morphological characteristics, coupled with DNA sequences of actin (<i>act</i>), calmodulin (<i>cal</i>), glyceraldehyde-3-phosphate dehydrogenase (<i>gapdh</i>), internal transcribed spacer (ITS) and β-tubulin2 (<i>tub2</i>) regions identified five isolates as <i>Colletotrichum atlanticum</i>. Based on the results of this study, this is the first report of torch ginger as a new host of <i>C. atlanticum</i> in Thailand. This research highlights the precise diagnosis of pathogens and the necessity to find effective disease management strategies to control anthracnose on torch ginger production in southern Thailand.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring Bacterial Endophytes as Potential Biocontrol Agents Against Aspergillus parasiticus Colonisation and Aflatoxin Contamination in Maize","authors":"Ganapathy Sivakaame,&nbsp;Theerthagiri Anand,&nbsp;Vaikuntavasan Paranidharan,&nbsp;Govindasamy Senthilraja,&nbsp;Chinnapaiyan Vanitha","doi":"10.1111/jph.70119","DOIUrl":"https://doi.org/10.1111/jph.70119","url":null,"abstract":"<div>\u0000 \u0000 <p>Aflatoxin is one of the most deleterious types of mycotoxins commonly found in maize. Using native endophytic bacteria to control phytopathogens can be a successful strategy for managing plant diseases. A total of 26 endophytic bacterial strains were isolated from different parts of maize plants and their efficacy tested against the mycelial growth of highly toxigenic <i>Aspergillus parasiticus</i> Asp23. Among the endophytic isolates, EPL2 and EPL3 showed the highest inhibition (51.1% inhibition over control after 7 days of co-culture) followed by EPR2, EPR4 and EPC1. All effective bacterial isolates were tentatively identified by 16S rRNA gene sequence analysis and homology analysis with the NCBI nucleotide database using BLAST search. A detoxification assay indicated that endophytic bacterial isolates EPR2, EPL2 and EPL3 were superior in detoxifying both aflatoxin B1 and B2. Furthermore, we demonstrated the antifungal mechanisms of endophytic bacteria, such as the production of extracellular lytic enzymes, antifungal volatiles and siderophores. Finally, the effect of endophytic bacterial isolates EPL3, EPR2 and EPC2 was tested against <i>A. parasiticus</i> and aflatoxin contamination in maize grains in vivo. The results revealed that there was a significant reduction in colonisation of <i>A. parasiticus</i> and the lowest population was recorded in EPL3-treated maize grains, followed by EPR2. Similarly, the endophyte EPL3 showed the highest reduction in aflatoxin levels of 94.8% (to 23.05 ppb), followed by EPR2 (94.4% reduction to 24.71 ppb), whereas in the untreated control the aflatoxin level was 445.37 ppb. This study demonstrated that endophytic bacteria isolated from maize could be a successful biocontrol source to suppress <i>Aspergillus</i> growth and reduce aflatoxin contamination in maize grains.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytophthora palmivora as a Causal Pathogen of Stem Canker and Fruit Rot of Durio zibethinus in China","authors":"Ganggang Dong,&nbsp;Mingshuo Xue,&nbsp;Shenghua Xie,&nbsp;Xuejie Feng,&nbsp;Xianghong Li,&nbsp;Zaifeng Fan","doi":"10.1111/jph.70089","DOIUrl":"https://doi.org/10.1111/jph.70089","url":null,"abstract":"<div>\u0000 \u0000 <p>Durian (<i>Durio zibethinus</i> L.) is a high-value tropical seasonal fruit and an important cash crop in Southeast Asia. Durian introduction trials have been conducted in Hainan Province, China, and the first durian plantations have been established in recent years. However, the high temperature and humidity in Hainan Province favour plant diseases, severely affecting durian yield and quality. From July 2023 to June 2024, a disease survey was conducted in 21 durian orchards across six regions on southern Hainan Island, revealing that the primary diseases affecting durian were stem canker (black-head), fruit rot, and root rot. The main symptoms are stem necrotic blotch, brown root rot, and water-soaked fruit rot, which in severe cases can cause poor growth or extensive dieback of the durian tree. The causal pathogens were identified through morphological, molecular, and pathogenicity analyses. A total of 40 isolates were isolated from diseased durian fruits (30 isolates) and stems (10 isolates), exhibiting morphological characteristics similar to <i>Phytophthora</i> species. Further identification of the isolates was conducted using a combined dataset of ITS, <i>tef-1α</i> and <i>CoxI</i>, revealing that all the isolates belonged to <i>Phytophthora palmivora</i>. Pathogenicity tests confirmed <i>P. palmivora</i> as the pathogenic agent causing durian stem canker and fruit rot in Hainan Province. This study demonstrates that <i>P. palmivora</i> is the major causal agent of durian stem canker and fruit rot in China, providing a basis for improved durian disease identification and management.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 4","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paddy Crop Leaf Disease Classification Using Dense Kronecker Network","authors":"S. Veluchamy,&nbsp;Pon Bharathi A,&nbsp;Siva Raja P. M,&nbsp;Shaji D. S","doi":"10.1111/jph.70087","DOIUrl":"https://doi.org/10.1111/jph.70087","url":null,"abstract":"<div>\u0000 \u0000 <p>Agriculture plays a critical role in feeding populations worldwide, yet farmers often lack the specialised knowledge required to detect and treat diseases in crops, which can lead to delays in disease diagnosis. This challenge is particularly evident in the case of rice crops, where early detection of leaf diseases is essential for minimising losses. Although numerous methods for classifying rice leaf diseases have been proposed, many of them have shown limited effectiveness due to the complexity and diversity of the diseases. To address this gap, an advanced method for rice leaf disease classification named Dense Kronecker Net (DK-Net) is devised. Firstly, an input image is given into image preprocessing, which is done utilising a Wiener filter. Thereafter, image segmentation is conducted utilising M-segNet. Then, image augmentation takes place using flipping, cropping, and rotation techniques. After that, the segmented image is delivered to the feature extraction process and extracted features include Grey Level Co-occurrence Matrix (GLCM), entropy-based Complete Local Binary Pattern (CLBP), and Local Gabor Directional Pattern (LGDP). Finally, leaf disease classification is exhibited utilising DK-Net, which is a combination of DenseNet and Deep Kronecker Net. The DK-Net achieved outstanding performance with the highest accuracy of 91.3%, True positive rate (TPR) of 91.4%, and True negative rate (TNR) of 91.6%. These results demonstrate that DK-Net outperforms previous methods, offering a more accurate and robust solution for the early detection of rice leaf diseases.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaf Spot and Fruit Rot on Achachairu: Novel Diseases Caused by Lasiodiplodia theobromae","authors":"Kevison Romulo da Silva França,&nbsp;Marcus Vinícius Santos da Silva,&nbsp;Mayra Machado de Medeiros Ferro,&nbsp;Denise de Santana Silva,&nbsp;Jaqueline Figueredo de Oliveira Costa,&nbsp;Gaus Silvestre de Andrade Lima,&nbsp;Iraildes Pereira Assunção","doi":"10.1111/jph.70094","DOIUrl":"https://doi.org/10.1111/jph.70094","url":null,"abstract":"<p>The achachairu (<i>Garcinia humilis</i>) is an exotic tropical fruit native to Bolivia that has recently gained commercial popularity in Brazil. In a producing region of Pernambuco, Brazil, spots and rot symptoms were observed on the leaves and fruit of <i>G. humilis</i>. Fungal isolates from the <i>Lasiodiplodia</i> genus were obtained from symptomatic tissue. Based on multigenic analyses (<i>TEF1-α</i>, ITS and <i>TUB2</i>) and morphological characteristics, the isolates were identified as <i>L. theobromae</i>, which were confirmed to be pathogenic on achachairu leaves and fruits. This report presents two new diseases in achachairu caused by <i>L. theobromae</i>. This study improves our understanding of the achachairu pathosystem and establishes a foundation for future disease management research.</p>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jph.70094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144482111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Leaf Spot Disease Caused by Alternaria jacinthicola on Durio zibethinus in China","authors":"Ganggang Dong,&nbsp;Shenghua Xie,&nbsp;Mingshuo Xue,&nbsp;Xuejie Feng,&nbsp;Xianghong Li,&nbsp;Zaifeng Fan","doi":"10.1111/jph.70112","DOIUrl":"https://doi.org/10.1111/jph.70112","url":null,"abstract":"<div>\u0000 \u0000 <p>A leaf spot disease with an incidence of approximately 50% and a severity rate of around 70% was found on Durian in Hainan Province, China, in July 2023. The early symptoms appeared as light grey to dark brown, irregular, small, necrotic lesions, distributed along the leaf veins. As the disease progresses, the lesions turned to rusty-coloured necrotic spots and pale yellow chlorotic halos or rings around the edges, even extensive leaf death and defoliation, severely impairing photosynthesis. <i>Alternaria jacinthicola</i> and <i>Alternaria tomato</i> were isolated from diseased durian leaves, and only <i>A. jacinthicola</i> was identified as the predominant pathogen through morphological and multi-gene phylogenetic analysis. Pathogenicity assays demonstrated its ability to infect both durian leaves and fruits. To our knowledge, this is the first report of <i>A. jacinthicola</i> causing leaf spot disease on durian. These findings lay the foundation for further research into the pathogenesis of durian diseases and the development of effective control measures.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144482283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the Impact of Weather Parameters on Cotton Leaf Curl Disease Progression and Whitefly Population Dynamics: A Decadal Analysis (2011–2020)","authors":"N. K. Yadav,&nbsp;Yogesh Kumar,&nbsp;Navish Kumar Kamboj,&nbsp;Preeti Vashisht","doi":"10.1111/jph.70115","DOIUrl":"https://doi.org/10.1111/jph.70115","url":null,"abstract":"<div>\u0000 \u0000 <p>Cotton leaf curl disease (CLCuD) has become a potential menace to the production of cotton (<i>Gossypium hirsutum</i>) in Africa and South Asia. Whitefly (<i>Bemisia tabaci</i>) is the potential vector of this virus. Due to the dearth of resistant cultivars and effective management strategies of whitefly, yield loss in cotton is witnessd regularly. To ensure the timely application of management practices, there is a dire need for a reliable regression model that can forecast the CLCuD with high speed and accuracy. Keeping this in view, long-term studies were conducted during 2011–2020 at Cotton Research Station, Sirsa. The influence of weather parameters on the modulation of the disease progression and whitefly dynamics was recorded and analysed through correlation and regression. A prediction equation for disease incidence and vector population was developed through regression. Minimum temperature, maximum temperature and evening relative humidity (RH) significantly influenced the disease development, with the former two having negative significant effects. The coefficient of determination (<i>R</i>²) ranged from 0.19 to 0.90 for disease development with the weather parameters. The best fitted regression equation based on the decadal study for prediction of CLCuD incidence was <i>Y</i> = −12.913_Tmax + 2.489_Tmin + 0.242_RHm − 0.197_RHe − 0.890_Rf + 459.368 and for percent disease intensity (PDI) of CLCuD was <i>Y</i> = −8.962_Tmax + 2.608_Tmin + 0.232_RHm − 0.567_RHe − 0.570_Rf + 306.433. Additionally, a significant positive correlation between the CLCuD incidence, PDI and population of whiteflies was observed, as reflected by high values of the correlation coefficient (<i>r</i>) for most of the years during the period of study. The vector, whitefly (<i>B. tabaci</i>) population was also significantly influenced by the ambient weather conditions. High relative humidity favoured the whitefly population. Regression analysis revealed 25%–62% variability in whitefly population due to weather parameters, and the best fitted regression model for whitefly incidence is <i>Y</i> = −0.194_Tmax − 1.610_Tmin − 0.439_RHm + 0.911_RHe + 0.020_Rf + 44.733. On the basis of these equations, the main meteorological factors, such as temperature, relative humidity and rainfall, have a substantial impact on the emergence of CLCuD over the years.</p>\u0000 </div>","PeriodicalId":16843,"journal":{"name":"Journal of Phytopathology","volume":"173 3","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}