BIOFERTILIZER AND BOTANICAL PESTICIDE EFFECTS ON OIL PALM SEEDLINGS

Saul Panca Bangun; Razali Razali; Octanina Sari Br Sijabat

doi:10.58432/x20t2j46

Authors

Saul Panca Bangun Tjut Nyak Dhien University Author
Razali Razali Tjut Nyak Dhien University Author
Octanina Sari Br Sijabat Tjut Nyak Dhien University Author

DOI:

https://doi.org/10.58432/x20t2j46

Keywords:

oil palm, biofertilizer, mycorrhiza, Trichoderma, botanical pesticide

Abstract

This study evaluated the effects of biofertilizers (Trichoderma and mycorrhiza), citronella-based botanical pesticide, and their interaction on the vegetative growth and pest attack intensity of oil palm (Elaeis guineensis Jacq.) seedlings during the pre-nursery stage. The experiment used a 3 × 3 factorial randomized block design with three replications. The first factor was biofertilizer: control (P0), Trichoderma 15 g plant⁻¹ (P1), and mycorrhiza 15 g plant⁻¹ (P2). The second factor was citronella botanical pesticide: control (N0), 25 mL plant⁻¹ (N1), and 50 mL plant⁻¹ (N2). Plant height, stem diameter, leaf area, leaf number, and pest attack intensity were observed from 5 to 12 weeks after planting. Mycorrhiza significantly increased plant height at 10 weeks and leaf area at 12 weeks, while stem diameter was not significantly affected. Leaf number showed significant responses to biofertilizer at 7 weeks, botanical pesticide at 5 weeks, and their interaction at 5 and 6 weeks. Pest attack intensity was generally low and did not show a significant main or interaction effect across the observation period. The highest numerical values for plant height and leaf area were obtained with mycorrhiza, whereas the P2N2 combination produced the highest numerical leaf area at 12 weeks. The findings indicate that mycorrhiza has greater potential than Trichoderma for improving selected early growth traits of oil palm seedlings, while citronella pesticide can be incorporated into pre-nursery management without a statistically detectable growth penalty.

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