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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Jurnal Agrotek Tropika Jurnal Agrotropika Jurnal Pengabdian Fakultas Pertanian Universitas Lampung Jurnal Proteksi Agrikultura
Cipta Ginting, Cipta
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Immunology & microbiology Veterinary

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Efficacy of phosphonic acid applied by spraying and seed treatment at various concentrations for controlling downy mildew disease in maize Ginting, Cipta; Pramesti, Elisa Amelia; Maryono, Tri; Sudarsono, Hamim; Susanto, Herry; Akin, Hasriadi Mat
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225328-336

Abstract

Downy mildew, caused by Peronosclerospora spp., is one of the major problems in maize cultivation. Several studies have reported the development of resistance in Peronosclerospora spp. to metalaxyl, which had previously been an effective control method for the disease. Other research suggests that the efficacy of phosphonic acid in controlling downy mildew in maize is inconsistent. The objective of this study was to evaluate the efficacy of seed treatment with phosphonic acid in controlling downy mildew in Bisi 18 maize. The treatments were arranged in a randomized block design with six replications. The observed variables included the incidence and severity of the disease, the area under the disease progress curve (AUDPC), maize yield, and the content of tannin and hydroquinone compounds in maize leaves. The results showed that both phosphonic acid applied by spraying and seed treatment significantly reduced the incidence and severity of downy mildew (P < 0.05). However, the concentrations of phosphonic acid used in seed treatment had no significant effect on the disease during 1–7 weeks after inoculation. Furthermore, all phosphonic acid treatments tended to increase the content of tannin and hydroquinone compounds in maize leaves, which should be confirm quantitatively.
Begomovirus: Potensi ancaman pertanian hortikultura Lampung Helina, Selvi; Akin, Hasriadi Mat; Dirmawati, Suskandini Ratih; Fitriana, Yuyun; Maryono, Tri; Suharjo, Radix; Ginting, Cipta
Jurnal Proteksi Agrikultura Vol. 2 No. 2 (2025): NOVEMBER, JURNAL PROTEKSI AGRIKULTURA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpa.2242-55

Abstract

Begomoviruses are a group of plant viruses belonging to the Geminiviridae family, persistently transmitted by the whitefly Bemisia tabaci, and pose a serious threat to horticultural crops in Lampung Province, Indonesia. These viruses infection symptoms such as mosaic, chlorosis, leaf curling, and stunted growth, with yield losses reaching up to 90%. The spread is exacerbated by intensive cultivation practices, the use of uncertified seeds, and tropical climates that favor high vector populations. This study explores the biological characteristics of Begomoviruses, their transmission mechanisms via vectors, and their high genetic variability due to frequent mutation and recombination. Several begomovirus species have been identified infecting key horticultural crops in Lampung, including Ageratum yellow vein virus (AYVV), Tomato yellow leaf curl Kanchanaburi virus (TYLCKaV), and Pepper yellow leaf curl Indonesia virus (PepYLCIV). In addition to vector transmission, some begomovirus species are also known to be seed-transmitted, expanding their epidemic potential. Integrated management strategies discussed in this article include the use of resistant varieties, biological and agronomic control of vectors, and the development of innovative approaches such as mild strain cross-protection. This review emphasizes the need for continuous monitoring and science-based sustainable strategies to mitigate the impact of Begomoviruses on food security and horticultural productivity in tropical regions such as Lampung.
Efikasi beberapa jenis fungisida nabati untuk mengendalikan penyakit bulai pada tanaman jagung varietas BISI-18 Ningrum, Anggun Shermila Zahra Candra; Ginting, Cipta; Maryono, Tri; Aeny, Titik Nur; Sudarsono, Hamim; Hariri, Agus Muhammad
Jurnal Proteksi Agrikultura Vol. 1 No. 2 (2024): NOVEMBER, JURNAL PROTEKSI AGRIKULTURA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpa.2181-94

Abstract

Downy mildew disease (Maize downy mildew) caused by Peronosclerospora spp. is a major disease in corn that can significantly reduce corn production. An environmentally friendly alternative method to control this disease is the use of botanical fungicides. This study aimed to evaluate the efficacy of botanical fungicides derived from betel leaf extract (Piper betle), Javanese chili leaf extract (Piper retrofractum), and neem leaf extract (Azadirachta indica) in controlling downy mildew disease in BISI-18 corn variety. The research was conducted from January to June 2024. The experimental plots measured 2 x 1.25 m (2.5 m²). Treatments were arranged in a randomized block design (RBD) on a 12 x 9 m plot, consisting of five treatments and six replications (groups). Natural inoculation of the downy mildew pathogen was carried out by placing one symptomatic plant in each experimental plot. Observed variables included incubation period, disease incidence and severity, AUDPC (Area Under Disease Progress Curve), phytochemical analysis, and yield. The results showed that the botanical fungicide from betel leaf extract was the most effective in reducing the intensity of downy mildew, while both betel leaf extract and neem leaf extract were moderately effective in suppressing the AUDPC of the disease. However, all botanical fungicide treatments were ineffective in increasing secondary metabolite content and yield of the BISI-18 corn variety.
PHYSIC NUT (JATROPHA CURCAS L.) DISEASES IN LAMPUNG PROVINCE GINTING, CIPTA
BIOTROPIA Vol. 16 No. 1 (2009): BIOTROPIA Vol. 16 No. 1 June 2009
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2009.16.1.66

Abstract

Intensified cultivation of physic nut (Jatropha curcas L.) could raise the importance of plant diseases.  The objectives of this research were to diagnose diseases occurring on physic nut in Lampung Province and to determine their intensity.  Field observation was conducted in four districts: South Lampung, Tanggamus, Bandarlampung, and Tulang Bawang.  Disease intensity, whether expressed as disease incidence or severity, was recorded from plant samples determined by making diagonal lines across the field on which five observation spots were made.  On each spot, five plant samples were observed.  Specimens were also collected and placed individually in plastic bags for laboratory observation.  The diseases found on physic nut in Lampung Province were cercospora leaf spot, alternaria leaf spot, fusarium wilt, and bacterial wilt.  In addition, leaf malformation first thought to be viral disease was commonly found in many locations.  Further mechanical transmission failed to produce similar symptom on tested plants and higher population of mites were found on malformed leaves than that in normal leaves.  Based on the disease distribution and intensity, the most likely threatening disease in physic nut cultivation is bacterial wilt.  Fusarium also  caused wilt, but it was only found in one subdistrict with low incidence.  Keywords: Alternaria, Cercospora, fusarium wilt, bacterial wilt, Jatropha curcas diseases
Co-Authors Agus Muhammad Hariri, Agus Muhammad Aris Nurhidayat, Aris Azrah Humairah Sirait Fauzia, Dita Nur Hamim Sudarsono . Hasriadi Mat Akin Helina, Selvi Herry Susanto I GEDE SWIBAWA, I GEDE Islamika, Nur Ivayani, Ivayani Joko Prasetyo Juniar, Nur Baitullah Liandari, Rizky Fatma Muhammad Nurdin Mujim, Subdi Ningrum, Anggun Shermila Zahra Candra Pramesti, Elisa Amelia PUJI LESTARI Radix Suharjo Rusdi Evizal Setyo Dwi Utomo Susilo, F X Suskandini Ratih Dirmawati Titik Nur Aeny Tri Maryono YUSNITA YUSNITA Yuyun Fitriana