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All Journal Microbiology Indonesia AGRIVITA, Journal of Agricultural Science Journal of ICT Research and Applications JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
KIKIN HAMZAH MUTAQIN
Department Of Plant Protection, Faculty Of Agriculture, Bogor Agricultural University, Jalan Meranti, Bogor 16680, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Immunology & microbiology Medicine & Pharmacology

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Geminiviruses Associated with the Weed Species Ageratum conyzoides, Centipeda minima, Porophyllum ruderale, and Spilanthes iabadicensis from Java, Indonesia RIKA MELIANSYAH; SR HENDRASTUTI HIDAYAT; KIKIN HAMZAH MUTAQIN
Microbiology Indonesia Vol. 5 No. 3 (2011): September 2011
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.939 KB) | DOI: 10.5454/mi.5.3.4

Abstract

Geminivirus has a wide host range including cultivated plants and weeds. Infected weeds may play an important role in disease epidemic. Unfortunately, little is known about weeds species that may serve as alternative host for Geminivirus. This research was conducted to identify Geminivirus on weeds around chili pepper field to study their potential role as virus reservoir. Field surveys were conducted to chilli pepper growing area inWest and Central Java Provinces, and The Special Province of Yogyakarta during 2009 to collect symptomatic weed plants. Geminivirus infection was detected using PCR technique from 9 weed samples, i.e. 5 samples Ageratum conyzoides from Bogor (AgrBgr), Sukabumi (AgrSkm), Magelang (AgrMgl), Sleman (AgrJgy), and Garut (AgrGrt); Centipeda minima from Magelang (CtpMgl); A. boehmerioides from Sleman (AcpJgy); Porophyllum ruderale from Bogor (PrlBgr); Spilanthes iabadicensis from Magelang (SplMgl). Further genetic analysis showed that those geminiviruses can be differentiated into 2 clusters, showing the possible genetic differences among them. They neither have a close relationship with other geminiviruses published earlier in the GenBank, indicating weed infecting collected Geminivirus in this study is possibly a distinct Geminivirus.
Identification of mealybugs on Piper nigrum as vector of Piper yellow mottle virus (Badnavirus: Caulimoviridae) Miftakhurohmah Miftakhurohmah; Sri Hendrastuti Hidayat; Kikin Hamzah Mutaqin; Bonny Poernomo Wahyu Soekarno; Dono Wahyuno
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 22 No. 2 (2022): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.222144-153

Abstract

Piper yellow mottle virus (PYMoV) is the dominant virus that causes mottle disease in black pepper (Piper nigrum). Two species of mealybugs, Ferrisia virgata and Planococcus minor have been reported as vectors of PYMoV. A different species of mealybug that has never been reported before was found in black pepper. Molecular approaches including total DNA isolation of mealybug collected from the field, mealybugs identification by DNA barcode, detection of PYMoV in single mealybugs, were conducted as an approach to identify the potential of mealybugs as PYMoV vector in the field. Mealybugs were collected from black pepper plants in Cimanggu (Bogor, West Java) and Sukamulya (Sukabumi, West Java). Characters of adult females were observed for morphological identification. Molecular-based identification of the mealybugs and PYMoV involved the following procedures: total DNA isolation, DNA amplification, nucleotide sequencing and sequence analysis. Three species of mealybugs, P. minor, F. virgata and Paracoccus marginatus were confirmed by morphological and molecular identification. This is the first report for the occurrence of P. marginatus in black pepper plants. PYMoV was successfully detected from field samples of F. virgata, P. minor and P. marginatus. This finding indicates the potential of insect vectors for disease spread and distribution.
Characteristics of Virus Symptoms in Chili Plants (Capsicum frutescens) Based on RGB Image Analysis Asmar Hasan; Widodo Widodo; Kikin Hamzah Mutaqin; Muhammad Taufik; Sri Hendrastuti Hidayat
AGRIVITA, Journal of Agricultural Science Vol 44, No 3 (2022)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i0.3731

Abstract

Virus infection in chili plants may cause various symptoms. The complexity of the symptoms and human vision ability often become limiting factors during disease investigations. Digital image analysis is expected to become a method to assist in comprehensively describing the symptoms of plant viruses. A disease survey was conducted on cayenne pepper fields in Southeast Sulawesi Province to observe symptoms of virus infection virtually and to record the symptomatic plant using an RGB camera. The split-channel method is used to process images, followed by multidimensional scaling statistical analysis. Later on, viruses associated with plants were detected serologically. Single or mixed infection of Tobacco mosaic virus, Cucumber mosaic virus, Chili veinal mottle virus, and Pepper mottle virus was confirmed by plant leaves showing yellow-mosaic and mottle symptoms. The digital image analysis method could show variations in the characteristics of symptoms based on digital numbers in that cannot be recognized based on the observation of visual symptoms. A new approach to study the interactions between plant infecting viruses and their effects based on image analysis has also been developed during this research. This method needs to be further validated through testing under controlled conditions, such as inoculating plants with a predetermined type of virus.
The Potential of a Low-Cost Thermal Camera for Early Detection of Temperature Changes in Virus-Infected Chili Plants Asmar Hasan; Widodo Widodo; Kikin Hamzah Mutaqin; Muhammad Taufik; Sri Hendrastuti Hidayat
Journal of ICT Research and Applications Vol. 17 No. 1 (2023)
Publisher : DRPM - ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2023.17.1.2

Abstract

One effect of viral infection on plant physiology is increased stomata closure so that the transpiration rate is low, which in turn causes an increase in leaf temperature. Changes in plant leaf temperature can be measured by thermography using high-resolution thermal cameras. The results can be used as an indicator of virus infection, even before the appearance of visible symptoms. However, the higher the sensor resolution of the thermal camera, the more expensive it is, which is an obstacle in developing the method more widely. This article describes the potential of thermography in detecting Tobacco mosaic virus infection in chili-pepper plants using a low-cost camera. A FLIR C2 camera was used to record images of plants in two treatment groups, non-inoculated (V0) and virus-inoculated plants (V1). Significantly, V1 had a lower temperature at 8 and 12 days after inoculation (dai) than those of V0, but their temperature was higher than V0 before symptoms were visible, i.e., at 17 dai. Thermography using low-cost thermal cameras has potency to detect early viral infection at 8 dai with accuracy levels (AUC) of 80.0% and 86.5% based on k-Nearest Neighbors and Naïve Bayes classifiers, respectively.
Co-Authors Asmar Hasan Bonny Poernomo Wahyu Soekarno Dono Wahyuno Miftakhurohmah Miftakhurohmah Muhammad Taufik Muhammad Taufik RIKA MELIANSYAH SR HENDRASTUTI HIDAYAT SRI HENDRASTUTI HIDAYAT Widodo Widodo Widodo Widodo