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INDUKSI RESISTENSI MENGGUNAKAN SENYAWA KALIUM PHOSFAT (K3PO4) SEBAGAI PENGENDALIAN PENYAKIT CERATOCYSTIS PADA TANAMAN DUKU (Lansium domesticum Corr.) DI SUMATERA SELATAN

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Stem wilt disease caused by Ceratocystis fimbriata is one of the most devastating diseases of duku (Lansium domesticum) plants, causing up to 100% mortality in various production centers in South Sumatra. This study aimed to determine the effectiveness of Potassium Phosphate (K₃PO₄) as a resistance-inducing agent in suppressing disease development and enhancing the physiological response of duku plants. The study was conducted using a Completely Randomized Design (CRD) with five K₃PO₄ concentration treatments: P0 (0 ppm), P1 (50 ppm), P2 (100 ppm), P3 (200 ppm), and P4 (400 ppm), each consisting of 10 replications. In vitro tests were conducted to determine the effect of K₃PO₄ on Ceratocystis mycelial growth, while in vivo tests were conducted to assess the plant's physiological response and disease severity after pathogen inoculation. The results showed that in vitro tests, all treatments had no significant effect on fungal mycelium growth (p-value 0.09231), with P2 producing the largest colony area. However, in vivo tests, K₃PO₄ demonstrated a significant protective effect on plants. Treatments P3 and P4 reduced plant mortality compared to the control, with P0 reaching 60–80% mortality, while P3 and P4 only saw 20–30% mortality. Attack intensity also decreased, particularly in P4 (20%), significantly lower than in P0 (80%). Furthermore, physiological parameters such as chlorophyll and nitrogen content are increased in treatments P3 and P4, indicating that K₃PO₄ plays a role in maintaining plant metabolic stability during infection. Meanwhile, lesion length did not show significant differences between treatments. Overall, this study demonstrates that K₃PO₄ application has the potential to immediately increase plant resistance to Ceratocystis disease through resistance induction, particularly at concentrations of 200–400 ppm.

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Detail Information

Series Title

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Call Number

T1910792025

Publisher

Indralaya : Prodi Proteksi Tanaman, Jurusan Hama dan Penyakit Tumbuhan, Fakultas Pertanian Universitas Sriwijaya., 2025

Collation

xiv, 51 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

634.607

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

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Subject(s)

Prodi Proteksi Tanaman
PENYAKIT Ceratocystis

Specific Detail Info

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Statement of Responsibility

KA

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