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All Journal JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Asian Journal of Agriculture
Hanifah, Wafa’ Nur
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Agriculture, Biological Sciences & Forestry

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Effect of Papaya ringspot virus watermelon strain on growth, yield and quality of melon Selangga, Dewa Gede Wiryangga; Temaja, I Gede Rai Maya; Wirya, Gusti Ngurah Alit Susanta; Sudiarta, I Putu; Listihani, Listihani; Hanifah, Wafa’ Nur; Maulinda, Restiana
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 26 No. 1 (2026): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLANT PE
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.126180-189

Abstract

Papaya ringspot virus watermelon strain (PRSV-W) is a member of the genus Potyvirus that infects Cucurbitaceae crops. The first occurrence of PRSV-W in Indonesia was reported in Bali in 2022. However, information regarding yield loss caused by PRSV-W infection in melon has not yet been reported. This study aimed to analyze yield loss and changes in fruit quality of melon resulting from PRSV-W infection. The research methods included individual and population level disease observations, assessment of agronomic variables and disease severity, yield loss estimation, and data analysis. Observations were conducted at the Pegok Experimental Farm, Faculty of Agriculture, Udayana University, covering an area of 1000 m². The observed plant ages ranged from 6 to 66 days after planting (dap). Mosaic disease development was observed from 18 dap until before harvest. The highest disease incidence and disease severity recorded at the end of the observation period were 58.4% and 61.8%, respectively. Actual yield loss, calculated by comparing mosaic symptomatic and asymptomatic melon plants, reached 49.45%. The most prominent quality defects were changes in fruit color and shape and fruit malformation, with values of 14.06% and 17.5%, respectively. The greatest economic loss occurred in plots with an AUDPC value of 751, resulting in a total yield loss of IDR 15,721,500. Yield loss showed strong correlations with disease incidence and disease severity, with correlation values of 95.41% and 96.19%, respectively. PRSV-W infection altered fruit skin color from yellow-orange to pale yellow with ringspot symptoms, and PRSV-W was detected in the skin tissues of infected fruits. In addition, PRSV-W infection reduced fruit sweetness to 9–12 °Brix, whereas healthy fruits exhibited sweetness levels of 14–17 °Brix.
Phenotypic evaluation of gamma-induced dwarf mutants in Dendrobium crumenatum at M2 generation DWIYANI, RINDANG; DARMAWATI, IDA AYU PUTRI; KAWURI, RETNO; FITRIANI, YUYUN; KAMUHI, RINI HERMINA; HANIFAH, WAFA’ NUR; SANTIKA, I PUTU BENNY
Asian Journal of Agriculture Vol. 10 No. 1 (2026)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g100150

Abstract

Abstract. Dwiyani R, Darmawati IAP, Kawuri R, Fitriani Y, Kamuhi RH, Hanifah WN, Santika IPB. 2026. Phenotypic evaluation of gamma-induced dwarf mutants in Dendrobium crumenatum at M2 generation. Asian J Agric 10 (1): g100150. https://doi.org/10.13057/asianjagric/g100150. Bali, Indonesia, has strong potential for the development of ornamental orchids, particularly compact cultivars with high commercial value. Dendrobium crumenatum, a native Indonesian orchid, is widely appreciated for its white, fragrant flowers; however, its tall growth habit limits its suitability as a potted ornamental plant. This study aimed to induce and evaluate dwarf phenotypes in D. crumenatum using gamma irradiation. Plantlets were exposed to 0, 5, 10, 15, and 20 Gy, arranged in a completely randomized design with five replicates and three plantlets per replicate (n=75). Morphological traits were assessed after in vitro culture and acclimatization. Data were analyzed using analysis of variance followed by the Least Significant Difference (LSD) test at a 5% significance level (p<0.05). Gamma irradiation significantly affected all measured traits. The 5 Gy treatment caused severe growth suppression, reducing plant height, leaf number, and shoot number by approximately 53.7%, 81.7%, and 84.4%, respectively, compared to the control. In contrast, the 10 Gy treatment achieved a similar reduction in plant height (~52.6%) while maintaining higher leaf number (~83.3% of control) and shoot number (~62.2% of control), indicating a more balanced morphological response. The 15 Gy treatment showed minimal deviation from the control, whereas 20 Gy produced semi-compact plants with moderate shoot retention. These results demonstrate a non-linear dose-response relationship, where intermediate doses (particularly 10 Gy) optimize the trade-off between dwarfism and vegetative performance. These findings indicate that medium gamma irradiation doses are effective for generating dwarf D. crumenatum mutants suitable for potted ornamental use and demonstrate the potential of mutation breeding to support orchid improvement and the floriculture industry.
Co-Authors Gusti Ngurah Alit Susanta Wirya I G. R. M. TEMAJA I Putu Sudiarta Ida Ayu Putri Darmawati KAMUHI, RINI HERMINA Listihani, Listihani Maulinda, Restiana Retno Kawuri Rindang Dwiyani SANTIKA, I PUTU BENNY Selangga, Dewa Gede Wiryangga Yuyun Fitriani