1Davao Del Sur State College, Matti, Digos City, Davao del Sur, Philippines
Email: juanagudera@gmail.com
2Central Mindanao University, Maramag, Bukidnon, Philippines
Email: rbalovera@yahoo.com.ph
Received: 16th Dec, 2025; Revised: 8th Feb, 2026; Accepted: 12th Feb, 2026; Available Online: 28th Feb, 2026
The study on the application rates and frequencies of Kappaphycus alvarezii drippings (KD) on rice blast (Pyricularia grisea) management of potted rice under reduced fertilization was conducted from January to June 2022 at San Isidro, Magsaysay, Davao del Sur using double D rice variety. The study aimed to assess the days to leaf and panicle blast symptom apprearance, assess the severity of leaf blast, incidence of panicle blast, and other disease, and evaluate the agronomic, yield, and yield parameters of potted rice.
The application rates (ml/L) of KD (Factor A) influences the number of days to leaf and blast appearance and severity of leaf blast but not on panicle blast appearance and incidence. The application of 20 ml/L delayed the symptom appearance which results to low percent severity of leaf blast.
Moreover, significant differences on the percent severity of bacterial blight were recorded among the application rates (Factor A), frequencies (Factor B) of KD and levels of inorganic fertilizer (Factor C) and the interaction of the three factors.
On agronomic parameters, high significant differences on plant height (cm), panicle length (cm) and number of productive tillers per plant were recorded with the application of 20 ml/L of KD weekly, bi-weekly and monthly across levels of inorganic fertilizer. Significant interaction effects of the application rates (Factor A) and frequencies (Factor B) of KD were observed on the weight of 1000 grains but not on yield (kg/ha).
Keywords: Kappaphycus alvarezii, Pyricularia grisea, Drippings, Severity.
How to cite this article: Agudera JP Jr, Alovera RB. Application of Kappaphycus Alvarezii (Doty) L.M. Liao Drippings on Rice Blast (Pyricularia Grisea Cavara) Management under Reduced Fertilization. Int J Drug Deliv Technol. 2026;16(5s): 651-666; DOI: 10.25258/ijddt.16.5s.83
Source of support: Nil.
Conflict of interest: None