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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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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 Abdiansyah, Rei Abdul Latif Aida Farida Al Fatiha, Nazwa Putri Alamsyah, Jumadil Albertus Halawa Aldrisya Amir, Saiful Ananda Apri Anata Anata, Ananda Apri Andi Prayogi Ardana, M. Tara Mico Ashari, Reza Awalluddin Siregar Bambang Abdul Ghani Dewi Novina Sukapiring, Dewi Novina Dina Arfianti Saragih Dwi Napsetia, Upik Eka Bobby Febrianto, Eka Bobby Fadhillah Martua Lubis Faizin Ridho Ferdi Riza Friska Anggraini Barus Ghani, Bambang Abdul Guntoro Habib Handoko Habib Handoko Hafis Hari Alfahri Halawa, Albertus Handoko, Habib Hasibuan, Henry Budi Hasrudy Tanjung, Hasrudy Hastina Febriaty Henry Budi Hasibuan Ika Ucha Pradifta Rangkuti Irma Christiana Isna Ardila Ivan Alvianus Simangunsong Ivan Alvianus Simangunsong Jayawarsa, A.A. Ketut Juhari, Habi Kania Yustika Pakpahan Kevin Angelanta Kherunnisa, Musdalifah Kurnainy Tohir Lubis, Fadhillah Martua Maisarah Makhrani Sari Ginting Mardiah Mendrofa, Moreno Fransaro Moreno Fransaro Mendrofa Muhamad Iqbal Muhammad Akbar Syahbana Pane Muhammad Alfarizi Muhammad Firza Alpi, Muhammad Firza Muhammad Syahdan Muhammad Yusuf Dibisono Musdalifah Kherunnisa Novita Anggraini Nugroho, Agung Nurhayati Nurhayati Phaklen Ehkan Poppy Fitria Purba, Dwiky Julius Rafli Affandi Rahmad Dian Rahmadani, Nisfa Amalia Rambe, M. Sofyan Sauri Rambe, Surya Achmad Ratu Mutiara Siregar Reza Ashari Rico Ramadhan, Rico Rini Astuti Rio Ardiansyah Fenni Rio Ardiansyah Fenni Rizki Ananda Rizky Delianngi Robi Alisyahbana Sinuraya Saputra, Ferdian Saragih, M. Setya Perdana Sari Ginting, Makharani Satria Pratama Sibagariang, Roga Oloan Simbolon, Hasanal Fachri Satia Sinaga, Aguswan Sinuraya, Robi Alisyahbana Sovhia Agina Areta Br Ginting Sri Wahyuni Sulthon Parinduri Surya Achmad Rambe Suwanto Suwanto Syadrin, Saldi Syarifa Mayly Tiffany Zia Aznur Tohir, Kurnainy Utomo, Yuyut Budi Wanda Sandy Pratama WARDATUL HUSNA IRHAM Wiwik Lestari Yollanda, Resty Fadhillah