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Institut Teknologi Sawit Indonesia
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ANALYSIS OF THE EFFECT OF SUNLIGHT INTENSITY AND CONIDIUM DENSITY ON EDAMAME RUST DISEASE (PHAKOPSORA PACHYRHIZI) IN IMMATURE OIL PALM AREAS Kevin Angelanta; Guntoro; Nurliana
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 5 No. 8 (2026): JULY
Publisher : RADJA PUBLIKA

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Abstract

This study aims to analyze the effect of sunlight intensity and conidium density on the intensity of leaf rust disease caused by Phakopsora pachyrhizi in edamame plants grown in immature oil palm areas. The study used a quantitative descriptive approach by observing sunlight intensity, conidium density, and disease intensity. The data were analyzed using multiple linear regression with SPSS after log transformation of the disease intensity variable to meet the normality assumption. The Kolmogorov-Smirnov test showed an Asymp. Sig. value of 0.200, indicating that the data were normally distributed. The model also showed no multicollinearity, as indicated by a Tolerance value of 0.904 and a VIF of 1.106, and no heteroscedasticity pattern was found in the residual scatterplot. The regression produced the equation Y = 0.830 + 0.000000039X1 + 0.033X2. Sunlight intensity did not have a significant partial effect, whereas conidium density had a positive and significant effect on disease intensity. Simultaneously, both variables had a significant effect, with an F-statistic of 440.049 and an R Square value of 0.954.
ANALYSIS OF THE EFFECTS OF WIND SPEED AND CONIDIAL DENSITY ON LEAF RUST DISEASE (PHAKOPSORA PACHYRHIZI) IN IMMATURE OIL PALM PLANTATION AREAS Kania Yustika Pakpahan; Guntoro; Nurliana
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 5 No. 8 (2026): JULY
Publisher : RADJA PUBLIKA

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Abstract

This study aimed to analyze the effects of wind speed and conidial density on edamame leaf rust disease caused by Phakopsora pachyrhizi in immature oil palm plantation areas. The research was conducted at the Oil Palm Practice Farm of the Indonesian Oil Palm Institute of Technology, Deli Serdang, North Sumatra, through wind speed measurement, conidial observation using a spore trap, and disease intensity assessment. The data were analyzed using multiple linear regression with SPSS through classical assumption tests, t-test, F-test, and the coefficient of determination. The results showed that the regression model met the normality assumption, had no multicollinearity, and showed no indication of heteroscedasticity. Partially, wind speed did not have a significant effect on disease intensity (p = 0.437), whereas the number of conidia had a significant effect (p < 0.001). Simultaneously, both variables had a significant effect on disease intensity (F = 442.472; p < 0.001), with an R Square value of 0.955. These findings indicate that conidial density is an important indicator in the development of edamame leaf rust disease.
Co-Authors Abdi Azhari Hasibuan Adi Prima Saragih Adinda Thalia Adri Moses Manullang Ahmad Dhairobi Ahmad Fahmi Alhafiz Lubis Ahmad Saleh Anri Arjuna Simbolon Aulia, Mhd. Iqbal Cici Dalimunthe Claudio Ivan Fahik Dahmanto Safi&#039;i Devi Asriani Br Simanihuruk Dina Arfianti Saragih Eka Bobby Febrianto, Eka Bobby Ferdy Ikhwan Fiqran Al Mahri Gema Tarigan Habib Handoko Hamdan Mariadi Putra Hari Gunawan Hasrudy Tanjung, Hasrudy Hastina Febriaty Hasyim Muzadi Henry Budi Hasibuan Ika Ucha Pradifta Rangkuti Ingrid Ovie Ingrid Ovie Yosephine Iqbal Bukhori Irda Safni Irma Christiana Isna Ardila Kania Yustika Pakpahan Kevin Angelanta Kurnainy Tohir Lisnawita Lisnawita Lubis, Abdul Rahman Lubis, Ahmad Fahmi Alhafiz Maisarah Makhrani Sari Ginting Mardiana Wahyuni Marshal Arifin Sinaga Marzuti Isra Maulina, Viny Muhammad Firza Alpi, Muhammad Firza Muhammad iqbal Muhammad Yusuf Dibisono Nazila Risky Ramadhani Hsb Nazra Erisakinah Putri Nuraida Nuraida Nurfadilia Dini Rahayu Nurliana Poppy Fitria Pradana, Fery Priyo Adinugroho Radite Tistama Raju Setiawan Damanik Resty Fadhillah Rina Maharany Rini Astuti Rio Ardiansyah Fenni Rio Ardiansyah Fenni Ritna Wahyuni Roosmawati, Febriana Sakiah Sakiah Sani Paindra Simon Simanjuntak Sinaga, Anisyah Siti Maymunah Sri Murti Tarigan Sri Pauja Saragih Sulthon Parinduri Syeren Dava Azola Zatara Tantawi, A. Rafiqi Tasya Ananda Setiawan Tiffany Zia Aznur Wagino Wandi Marwadi Afandi Widia Lista Nasution Windra Surono Yazid, Abu Yusuf Dibisono, Mhd Zizi Graci Violita Zulham Efendi Zulham Effendi