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Journal articles on the topic 'Guava rust'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

Martins, Marlon Vagner Valentim, Silvado Felipe da Silveira, and Luiz Antônio Maffia. "Guava fruit loss caused by rust." Summa Phytopathologica 40, no. 2 (2014): 107–13. http://dx.doi.org/10.1590/0100-5405/1904.

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The aim of this paper was to estimate the loss caused by rust (Puccinia psidii) to 'Paluma' guava production in orchards located in Rio de Janeiro State. The disease intensity on the reproductive organs of plants was observed during two chemical control experiments carried out in 2003 and 2004. The loss was estimated based on simple linear regression and the production reduction (fruit number and weight ha-1) on the incidence of diseased buds and fruits. In the first experiment, no relationship was established between incidence of diseased buds and loss since there was a delay in spraying and

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2

DATAR, S. V., R. C. DUBEY, and N. CHATTOPADHYAY. "Studies on some diseases of fruits and vegetable crops in relation to meteorological parameters." MAUSAM 51, no. 3 (2021): 269–74. http://dx.doi.org/10.54302/mausam.v51i3.1785.

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The role of different meteorological parameters controlling the incidences of some diseases on tomato, guava and fig grown at Pune and Padegaon in Maharashtra state were studied by graphical superimposition and correlation techniques. Peak infestation of rust on fig was observed in January at Padegaon whereas maximum infestation of fruit canker on guava and early blight on tomato were reported respectively from September to first week of October and September to November at Pune. Increase in maximum temperature was found to increase the infestation of both fruit canker and early blight. Decrea

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3

Triwidodo, Hermanu, Efi Toding Tondok, and Desy Nur Avifah. "Susceptibility of Two Varieties of Guava (Psidium guajava L.) to Pest and Disease Infection in the Sub-District of Tanah Sareal, Bogor." Jurnal Perlindungan Tanaman Indonesia 25, no. 2 (2021): 106. http://dx.doi.org/10.22146/jpti.49851.

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This survey was done in several guava fields around Bogor and found many unhealthy plants infested by various plant pests and diseases. This study aimed to analyze the effect of various guava cultivars on pest and disease intensity on guava in the Sub-District of Tanah Sareal, Bogor. Samples were collected from 20 fields that consisted of 15 samples of Getas Merah and 5 samples of Bangkok Putih cultivars to identify plant pests and diseases. Interviews were done with field owners to obtain information on cultivating practices. Pests found based on morphological identification included plant bu

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4

Saifu Rohman, Rina Mahmudati, and Wiko Anang Ansoruloh. "Sistem Pakar Diagnosa Penyakit pada Tanaman Jambu Kristal Menggunakan Metode Dempster Shafer Berbasis Web." Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer 4, no. 1 (2024): 65–73. http://dx.doi.org/10.51903/juritek.v4i1.2892.

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The Crystal Guava plant can be attacked by several types of diseases. Diseases in crystal guava plants can cause significant losses in fruit production. Some pests and diseases that can attack crystal guava plants include fruit flies, bagworms, whiteflies, anthracnose, and red rust. Therefore, accurate and timely disease diagnosis is crucial in controlling and managing these diseases. In this study, an Expert System for Disease Diagnosis in Crystal Guava Plants Using the Dempster Shafer Method-Based Web was developed. The Dempster Shafer method calculates the likelihood of a disease attacking

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5

Ferrari, J. T., E. M. d. Nogueira, and A. J. T. dos Santos. "CONTROL OF RUST (PUCCINIA PSIDII) IN GUAVA (PSIDIUM GUAJAVA)." Acta Horticulturae, no. 452 (September 1997): 55–58. http://dx.doi.org/10.17660/actahortic.1997.452.8.

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6

da S. Machado, Patrícia, Morag Glen, Olinto L. Pereira, Arthur A. Silva, and Acelino C. Alfenas. "Epitypification of Puccinia psidii, Causal Agent of Guava Rust." Tropical Plant Pathology 40, no. 1 (2015): 5–12. http://dx.doi.org/10.1007/s40858-014-0002-8.

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7

Sanahuja, G., P. Lopez, A. J. Palmateer, and A. R. Chase. "Red Rust of Neoregelia Bromeliads Caused by a Parasitic Alga Cephaleuros parasiticus in Florida." Plant Health Progress 19, no. 1 (2018): 27–33. http://dx.doi.org/10.1094/php-11-17-0068-rs.

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A newly emerging disease affecting proprietary hybrids of Neoregelia bromeliads was found in nursery production throughout south Florida. Initial symptoms appeared as small, reddish leaf spots with signs of fungal-like growth on the abaxial leaf surface closely resembling a rust. Closer examination of diseased tissue revealed the growth to be an alga with morphological and molecular characteristics of Cephaleuros parasiticus. This genus of plant parasitic thalloid green algae occurs worldwide in tropical and subtropical regions. Isolates of C. parasiticus collected from Neoregelia hybrid brome

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8

Burman, Erin, James D. Ackerman, and Raymond L. Tremblay. "Invasive Syzygium jambos trees in Puerto Rico: no refuge from guava rust." Journal of Tropical Ecology 33, no. 3 (2017): 205–12. http://dx.doi.org/10.1017/s026646741700013x.

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Abstract:Biological invasions can have negative consequences for resident biota, particularly when disease-causing organisms are involved. Austropuccinia psidii, or guava rust, has rapidly spread through the tropics affecting both native and non-native Myrtaceae. In Puerto Rico, the rust has become common on Syzygium jambos, an invasive tree native to South-East Asia. What are the drivers of infection, and do refugia exist across a heterogeneous landscape? We address these questions using species distribution modelling and beta regressions. The realized and potential distribution of Syzygium j

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9

Hanik, Nur Rokhimah, Rindi Diah Ayu Fitriani, Fiky Ariska Cahyanti, Desty Oktavianingtyas, and Tri Wahyuni. "Identification of Pests and Diseases Crystal Guava (Psidium guajava L.) in Ngargoyoso District, Karanganyar Regency." Jurnal Biologi Tropis 23, no. 3 (2023): 127–35. http://dx.doi.org/10.29303/jbt.v23i3.5021.

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Pests and diseases that attack Crystal Guava are the main obstacles in increasing agricultural productivity, as well as disrupting plant physiology and growth. The purpose of this study was to identify pests and diseases of crystal guava (Psidium guajava L). The study was conducted for 3 months, (June-August) 2022 in three crystal guava gardens in Gemawang Village, Dukuh, Ngargoyoso District, Karangayar. Data were obtained from observations of guava plant samples crystals and fruit attacked by pests and diseases, as well as interviews with owners and managers to obtain information about cultiv

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10

Doutoum, Assad S., Recep Eryigit, and Bulent Tugrul. "Classification of Guava Leaf Disease using Deep Learning." WSEAS TRANSACTIONS ON INFORMATION SCIENCE AND APPLICATIONS 20 (October 23, 2023): 356–63. http://dx.doi.org/10.37394/23209.2023.20.38.

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A higher percentage of crops are affected by diseases, posing a challenge to agricultural production. It is possible to increase productivity by detecting and forecasting diseases early. Guava is a fruit grown in tropical and subtropical countries such as Chad, Pakistan, India, and South American nations. Guava trees can suffer from a variety of ailments, including Canker, Dot, Mummification, and Rust. A diagnosis based only on visual observation is unreliable and time-consuming. To help farmers identify plant diseases in their early stages, an automated diagnosis and prediction system is nece

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Quecine, Maria Carolina, Andressa Peres Bini, Emiliana R. Romagnoli, Fernando Dini Andreote, David Henry Moon, and Carlos Alberto Labate. "Genetic Variability in Puccinia psidii Populations as Revealed by PCR-DGGE and T-RFLP Markers." Plant Disease 98, no. 1 (2014): 16–23. http://dx.doi.org/10.1094/pdis-03-13-0332-re.

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Eucalyptus rust caused by Puccinia psidii is responsible for losses of approximately 20% of young Eucalyptus plants, depending on the environmental conditions and the geographic location. Despite its economic importance, there are few studies describing the genetic variability in P. psidii populations that infect different host plants. In the present study, we evaluated the ribosomal DNA internal transcribed spacer region (rDNA-ITS) using polymerase chain reaction denaturing gradient gel electrophoresis and terminal restriction fragment length polymorphism to assess the genetic variability in

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12

Ngoh, Dooh Jules Patrice, Nsangou Abdoul Nourou Kone, Serge Bertrand Mboussi, et al. "Red rust disease occurring in some fruits species in Cameroon." EUREKA: Life Sciences, no. 5 (November 16, 2022): 3–10. https://doi.org/10.21303/2504-5695.2022.002674.

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The knowledge of the red rust disease remains limited in Cameroon, with a view to developing a control method. This work consisted in studying red rust on some fruit species such as Annona muricata (soursop), Dacryodes edulis (safou), Psidium guajava (guava) and Theobroma cacao (cocoa). Diseased leaves were collected in the field in the Maham site, in west region of Cameroon.The symptomatology of disease (colour, number and diameter of lesions) was studied. Coefficient of variation ( %) was calculated. The incidence and severity of the disease was assessed in the different orchards surveyed. T

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Ribeiro, I. J. A., and C. V. Pommer. "BREEDING GUAVA (PSIDIUM GUAJAVA) FOR RESISTANCE TO RUST CAUSED BY PUCCINIA PSIDII." Acta Horticulturae, no. 632 (February 2004): 75–78. http://dx.doi.org/10.17660/actahortic.2004.632.9.

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14

Ngoh Dooh, Jules Patrice, Abdoul Nourou Kone Nsangou, Serge Bertrand Mboussi, et al. "Red rust disease occurring in some fruits species in Cameroon." EUREKA: Life Sciences, no. 5 (November 16, 2022): 3–10. http://dx.doi.org/10.21303/2504-5695.2022.002674.

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The knowledge of the red rust disease remains limited in Cameroon, with a view to developing a control method. This work consisted in studying red rust on some fruit species such as Annona muricata (soursop), Dacryodes edulis (safou), Psidium guajava (guava) and Theobroma cacao (cocoa). Diseased leaves were collected in the field in the Maham site, in west region of Cameroon.The symptomatology of disease (colour, number and diameter of lesions) was studied. Coefficient of variation ( %) was calculated. The incidence and severity of the disease was assessed in the different orchards surve

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15

Almadhor, Ahmad, Hafiz Tayyab Rauf, Muhammad Ikram Ullah Lali, Robertas Damaševičius, Bader Alouffi, and Abdullah Alharbi. "AI-Driven Framework for Recognition of Guava Plant Diseases through Machine Learning from DSLR Camera Sensor Based High Resolution Imagery." Sensors 21, no. 11 (2021): 3830. http://dx.doi.org/10.3390/s21113830.

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Plant diseases can cause a considerable reduction in the quality and number of agricultural products. Guava, well known to be the tropics’ apple, is one significant fruit cultivated in tropical regions. It is attacked by 177 pathogens, including 167 fungal and others such as bacterial, algal, and nematodes. In addition, postharvest diseases may cause crucial production loss. Due to minor variations in various guava disease symptoms, an expert opinion is required for disease analysis. Improper diagnosis may cause economic losses to farmers’ improper use of pesticides. Automatic detection of dis

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16

Uchida, J. Y., and L. L. Loope. "A Recurrent Epiphytotic of Guava Rust on Rose Apple, Syzygium jambos, in Hawaii." Plant Disease 93, no. 4 (2009): 429. http://dx.doi.org/10.1094/pdis-93-4-0429b.

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A Neotropical rust of the Myrtaceae, Puccinia psidii Winter, was described from Psidium guajava L., or guava, in Brazil in 1884 (1). It was first discovered in Hawaii on potted Metrosideros polymorpha Gaud. on Oahu in April 2005 (2) with pathogenicity and identity established (3). It spread quickly, and by January 2006, severe outbreaks of this rust occurred statewide on new leaves of Syzygium jambos (L.) Alston, or rose apple. Rose apple, a native to South and Southeast Asia, was introduced to Hawaii in 1825 and is locally abundant to invasive from just above sea level to as high as 1,000 m i

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17

Elith, J., J. Simpson, M. Hirsch, and M. A. Burgman. "Taxonomic uncertainty and decision making for biosecurity: spatial models for myrtle/guava rust." Australasian Plant Pathology 42, no. 1 (2012): 43–51. http://dx.doi.org/10.1007/s13313-012-0178-7.

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18

ZHONG, SHAOBIN, BAOJUN YANG, and ACELINO COUTO ALFENAS. "PERMANENT GENETIC RESOURCES: Development of microsatellite markers for the guava rust fungus, Puccinia psidii." Molecular Ecology Resources 8, no. 2 (2008): 348–50. http://dx.doi.org/10.1111/j.1471-8286.2007.01952.x.

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19

Carnegie, A. J., J. R. Lidbetter, J. Walker, et al. "Uredo rangelii, a taxon in the guava rust complex, newly recorded on Myrtaceae in Australia." Australasian Plant Pathology 39, no. 5 (2010): 463. http://dx.doi.org/10.1071/ap10102.

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20

Langrell, S. R. H., M. Glen, and A. C. Alfenas. "Molecular diagnosis ofPuccinia psidii(guava rust) – a quarantine threat to Australian eucalypt and Myrtaceae biodiversity." Plant Pathology 57, no. 4 (2008): 687–701. http://dx.doi.org/10.1111/j.1365-3059.2008.01844.x.

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21

Viler, Veronica, and Catherine A. Offord. "Ex situ' management including seed orchard establishment for Native Guava ('Rhodomyrtus psidioides') affected by Myrtle Rust." Australasian Plant Conservation: journal of the Australian Network for Plant Conservation 29, no. 2 (2020): 17–20. http://dx.doi.org/10.5962/p.373850.

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22

Martins, M. V. V., S. F. Silveira, L. A. Maffia, J. M. A. Rocabado, and V. Mussi-Dias. "Chemical control of guava rust (Puccinia psidii) in the Northern Region of Rio de Janeiro State, Brazil." Australasian Plant Pathology 40, no. 1 (2010): 48–54. http://dx.doi.org/10.1007/s13313-010-0012-z.

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23

Graça, Rodrigo N., Amy L. Ross-Davis, Ned B. Klopfenstein, et al. "Rust disease of eucalypts, caused byPuccinia psidii, did not originate via host jump from guava in Brazil." Molecular Ecology 22, no. 24 (2013): 6033–47. http://dx.doi.org/10.1111/mec.12545.

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Uchida, J., S. Zhong, and E. Killgore. "First Report of a Rust Disease on Ohia Caused by Puccinia psidii in Hawaii." Plant Disease 90, no. 4 (2006): 524. http://dx.doi.org/10.1094/pd-90-0524c.

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Several species of Metrosideros (Myrtaceae), referred to as ohia in Hawaii, are endemic trees that comprise as much as 80% of the native Hawaiian forests. For centuries, these trees have provided niches for many indigenous and endangered plants and animals and are treasured by Hawaiians for their beauty and role in folklore and legends. During April 2005, a cultivated ohia plant was diagnosed by the Agricultural Diagnostic Service Center at the University of Hawaii at Manoa as infected by a rust fungus. Rust pustules containing abundant urediniospores were observed on leaves, stems, and sepals

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25

Kriticos, Darren, Louise Morin, and Bruce Webber. "Taxonomic uncertainty in pest risks or modelling artefacts? Implications for biosecurity policy and practice." NeoBiota 23 (September 2, 2014): 81–93. https://doi.org/10.3897/neobiota.23.7496.

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Various aspects of uncertainty have become topical in pest risk modelling discussions. A recent contribution to the literature sought to explore the effect of taxonomic uncertainty on modelled pest risk. The case study involved a high profile plant pathogen Puccinia psidii, which causes a major disease of plants within the Myrtaceae family. Consequently, the results and recommendations may attract a wide range of interest in the biosecurity and pest risk modelling communities. We found the study by Elith et al. (2013) included a number of methodological issues that limit some of the specific a

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Subedi, Subash, Sheela Koirala, and Saraswati Neupane. "Diversity and occurrence of major diseases of vegetables and fruit crops during spring season at Aanbukhaireni rural municipality of Tanahun district, Nepal." Journal of Agriculture and Natural Resources 2, no. 1 (2019): 60–74. http://dx.doi.org/10.3126/janr.v2i1.26043.

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A survey has been conducted to assess the diversity and occurrence of major vegetables and fruits cultivated in Aanbukhaireni rural municipality of Tanahun district, Nepal during spring season of 2019.The surveyed areas were Satrasayaphant, Baradiphant and Dumridanda villages of ward no 1, Yeklephant, Markichowk and Pateni villages of ward no2 , Gaadapani village of ward no 3, Saakhar village of ward no 4 and Ghummaune village of ward no. 5. The surveyed area consists of upper tropical and sub tropical climate. The total no of farmers field selected for the survey was 34, 32, 24, 17 and 21 fro

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Kaur, R., A. R. McTaggart, D. M. Ferrin, and M. C. Aime. "First Report of Uromyces plumbarius, Rust of Gaura, in Louisiana and a new host, Guara lindheimeri." Plant Disease 96, no. 4 (2012): 590. http://dx.doi.org/10.1094/pdis-12-11-1020.

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Gaura lindheimeri Engelm. & A. Gray (Onagraceae) is an ornamental shrub that is native to southern Louisiana and Texas. Its texture and form make it a popular perennial border plant. In April 2010 and 2011, three collections of Guara leaf samples with signs and symptoms of a rust disease were made from a home garden in Baton Rouge, LA. Infected leaves showed chlorotic lesions on the adaxial surface and were associated with scattered, hypophyllous uredinia. Urediniospores were globose to obovoid, echinulate, had two equatorial germ pores, and measured 16 to 21 × 18 to 25 μm with a wall 2 μm

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Chen, Yan, Regina Bracy, and Roger Rosendale. "(61) Nutrient Management of Common Herbaceous Perennial Plantings in Southern Landscapes." HortScience 41, no. 4 (2006): 1071B—1071. http://dx.doi.org/10.21273/hortsci.41.4.1071b.

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While herbaceous perennials continuously gain popularity in southern landscape plantings, the nutrient requirements of many species in this group are still unknown. The business goal of lawn and garden care companies emphasizes aesthetic value of the urban landscape. Improper nutrient management, such as the overapplication of fertilizers, is inefficient and may result in increased pest problems and risks of contaminating ground and surface waters by nutrient runoff. Seven herbaceous perennials (lantana, rudbeckia, purple cone flower, daylily, mexican heather, cigar plant, and guara) were plan

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29

Gonçalves, Manoel Penachio, Antonio Fernandes Nogueira Junior, Rafael Vasconcelos Ribeiro, and Lilian Amorim. "Monocyclic components and photosynthetic damage caused by myrtle rust in guava leaves." Phytopathology®, January 20, 2022. http://dx.doi.org/10.1094/phyto-11-21-0480-r.

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Austropuccinia psidii, the causal agent of myrtle rust, was for many years restricted to the Americas, but since reaching Hawaii in 2005, the pathogen has expanded its global range exponentially. In Brazil, myrtle rust is the main fungal disease in guava plants. Despite this, there are few studies on guava rust epidemiology. The objectives of this study were to quantify the monocyclic components of rust and to evaluate the photosynthetic damage caused by A. psidii in young and old leaves of ‘Paluma’ guava. The monocyclic components of guava rust and gas exchange in healthy or inoculated (105 m

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Morales, João V. P., Thaís R. Boufleur, Manoel P. Gonçalves, et al. "Differential aggressiveness of Austropuccinia psidii isolates from guava and rose apple upon cross‐inoculation." Plant Pathology, December 15, 2023. http://dx.doi.org/10.1111/ppa.13850.

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AbstractMyrtle rust, caused by Austropuccinia psidii, has been associated with more than 480 plant species belonging to the family Myrtaceae. Intraspecific variability in pathogenicity has been reported among isolates of A. psidii from different hosts. However, there are few studies that have comparatively quantified the disease in guava (Psidium guajava) and rose apple (Syzygium jambos). The objective of this work was to quantify the pathogenic variability of A. psidii isolates collected from guava and rose apple in Brazil and to investigate the mechanisms of infection and colonization of the

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Harmon, Philip F., Carrie L. Harmon, Aaron J. Palmateer, and Stephen H. Brown. "Rusts on Ornamentals in Florida." EDIS 2009, no. 5 (2009). http://dx.doi.org/10.32473/edis-pp172-2009.

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PP-256, a 6-page illustrated fact sheet by Philip F. Harmon, Carrie L. Harmon, Aaron J. Palmateer, and Stephen H. Brown, presents information on four representative rust diseases of ornamentals, including gladiolus rust, daylily rust, frangipani rust, and guava rust. Includes references. Published by the UF Department of Plant Pathology, May 2009. PP256/PP172: Rusts on Ornamentals in Florida (ufl.edu)

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-, Akanksha Nautiyal, and Vrahistha Daruwalla -. "From Waste to Wonder: Leveraging Rust Dyeing and Eco-Printing for Modern Sustainable Textiles." International Journal For Multidisciplinary Research 6, no. 4 (2024). http://dx.doi.org/10.36948/ijfmr.2024.v06i04.26838.

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In rust dyeing, rusted objects are repurposed to transfer unique patterns and earthy tones onto fabric, transforming what might be considered waste into beautiful, sustainable works of art. This study investigates the combined effects of rust dyeing and eco-printing on different fabric types—cotton, modal, viscose, and polyester. Rust dyeing was performed using rusted iron nails to impart earthy tones of brown and orange to the fabrics. Following the dyeing process, eco-printing was carried out using Psidium guajava (guava) leaves that were pre-mordanted with a ferrous sulphate solution. The c

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Chen, Stephanie H., Jia‐Yee S. Yap, Veronica Viler, et al. "Pathways to Recovery: Genomics and Resistance Assays for Tree Species Devastated by the Myrtle Rust Pathogen." Molecular Ecology, July 10, 2025. https://doi.org/10.1111/mec.70030.

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ABSTRACTMyrtle rust is a plant disease caused by the invasive fungal pathogen Austropuccinia psidii (G. Winter) Beenken, which has a global host list of 480 species. It was detected in Australia in 2010 and has caused the rapid decline of native Myrtaceae species, including rainforest trees Rhodamnia rubescens (Benth.) Miq. (scrub turpentine) and Rhodomyrtus psidioides (G.Don) Benth. (native guava). Ex situ collections of these species have been established, with the goal of preserving remaining genetic variation. Analysis of reduced representation sequencing (DArTseq; n = 444 for R. rubescens

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Sales, Lucas Santos, Manoel Penachio Gonçalves, Beatriz Appezzato-da-Glória, and Lilian Amorim. "Partial resistance to myrtle rust and photosynthetic responses on 'Suprema' guava plants infected by Austropuccinia psidii." Tropical Plant Pathology, July 18, 2023. http://dx.doi.org/10.1007/s40858-023-00592-7.

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Choon Fai Foo, Kim Gaik Tay, Osamah Al-Qershi, Audrey Huong, Chang Choon Chew, and Shehab Abdulhabib Alzaeemi. "Android-Based App Guava Leaf Diseases Identification using Convolution Neural Network." Journal of Advanced Research in Applied Sciences and Engineering Technology, October 4, 2024, 73–88. http://dx.doi.org/10.37934/araset.57.1.7388.

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Guava is an economically significant fruit crop in many regions. Conventional plant disease identification depends on skilled workers visually inspecting samples, which can be laborious and error-prone. Therefore, the goal of this study is to create an Android app that uses InceptionV3 to precisely determine the health of guava plants, with an emphasis on hyperparameter tuning and ideal model selection. Inception V3 was chosen as the base model for this study as it outperformed the 25 pre-trained models from Keras API. The Guava leaves dataset consists of 120 raw images collected from real-tim

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Bockovac, Timea, and Ana Mikić Čolić. "Tvorba pandemijskih neologizama u mađarskom i hrvatskom jeziku." SlavVaria 2, no. 1 (2022). http://dx.doi.org/10.15170/sv.1/2022.193.

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Pandemic-related neologism formation. Great changes in the extralinguis-tic world have always spawned neologisms. The more intense the changes, the greater the number of new words or the number of new senses of existing words. A linguistic response to the changes in our lives caused by the corona-virus pandemic is an increased number of neologisms, which are being created on a daily basis.The aim of this paper is to analyse the pandemic-related lexicon. The corpus has been collected from the media discourse. The analysis focuses on the word-formation level, i.e. the ways neologisms are formed:

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