PENGARUH PENANAMAN BUNGA PUKUL DELAPAN (TURNERA SUBULATA) TERHADAP SERANGAN HAMA ULAT API PADA TANAMAN KELAPA SAWIT DI PTPN IV KANAU AEK NABARA

DHYO AGINDA, NPM 2203100043 (2026) PENGARUH PENANAMAN BUNGA PUKUL DELAPAN (TURNERA SUBULATA) TERHADAP SERANGAN HAMA ULAT API PADA TANAMAN KELAPA SAWIT DI PTPN IV KANAU AEK NABARA. Skripsi thesis, Universitas Labuhanbatu.

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Abstract

Penelitian ini bertujuan untuk mengetahui hubungan penanaman bunga pukul delapan (Turnera subulata) dengan tingkat serangan hama ulat api pada tanaman kelapa sawit di PTPN IV Kanau Aek Nabara serta menganalisis besarnya hubungan tersebut terhadap kerusakan daun. Penelitian menggunakan pendekatan kuantitatif dengan metode korelasional. Pengumpulan data dilakukan melalui observasi langsung di lapangan dengan mengamati keberadaan bunga pukul delapan, populasi ulat api, populasi musuh alami, dan persentase kerusakan daun kelapa sawit. Data dianalisis menggunakan korelasi Pearson Product Moment dan uji signifikansi koefisien korelasi. Hasil penelitian menunjukkan bahwa rata-rata persentase kerusakan daun akibat serangan ulat api pada petak yang ditanami bunga pukul delapan sebesar 4,5%, sedangkan pada petak kontrol tanpa bunga pukul delapan mencapai 21,0%. Populasi musuh alami, baik predator maupun parasitoid, juga ditemukan lebih tinggi pada petak yang ditanami bunga pukul delapan dibandingkan dengan petak kontrol. Hasil analisis menunjukkan koefisien korelasi Pearson sebesar −0,967, yang menunjukkan hubungan negatif sangat kuat antara keberadaan bunga pukul delapan dan persentase kerusakan daun. Hasil uji signifikansi menunjukkan nilai t hitung sebesar 10,82 lebih besar daripada t tabel sebesar 2,306 pada taraf signifikansi 5%. Koefisien determinasi sebesar 93,60% menunjukkan besarnya kontribusi hubungan statistik tersebut, sedangkan 6,40% sisanya berkaitan dengan faktor lain di luar penelitian. Dengan demikian, penanaman bunga pukul delapan berpotensi menjadi salah satu komponen pengendalian hama terpadu yang ramah lingkungan untuk menekan serangan ulat api pada tanaman kelapa sawit. Kata kunci: Bunga Pukul Delapan, Turnera Subulata, Ulat Api, Kelapa Sawit, Tanaman Refugia, Pengendalian Hama Terpadu ================================================================================================== This study aimed to determine the relationship between planting eight o’clock flower (Turnera subulata) and the level of fire caterpillar attacks on oil palm plants at PTPN IV Kanau Aek Nabara, as well as to analyze the strength of this relationship with leaf damage. The study employed a quantitative approach using a correlational method. Data were collected through direct field observations of the presence of eight o’clock flowers, fire caterpillar populations, natural enemy populations, and the percentage of oil palm leaf damage. The data were analyzed using the Pearson Product-Moment correlation and a correlation coefficient significance test. The results showed that the average percentage of leaf damage caused by fire caterpillar attacks in plots planted with eight o’clock flowers was 4.5%, whereas the control plots without these flowers experienced 21.0% leaf damage. The populations of natural enemies, including predators and parasitoids, were also higher in plots planted with eight o’clock flowers than in the control plots. The analysis yielded a Pearson correlation coefficient of −0.967, indicating a very strong negative relationship between the presence of eight o’clock flowers and the percentage of leaf damage. The significance test showed that the calculated t-value of 10.82 was greater than the critical t-value of 2.306 at the 5% significance level. The coefficient of determination of 93.60% indicates the magnitude of the statistical contribution associated with the relationship, while the remaining 6.40% is associated with other factors outside the scope of this study. Therefore, planting eight o’clock flowers has the potential to serve as an environmentally friendly component of integrated pest management to reduce fire caterpillar attacks on oil palm plants. Keywords: Eight O’clock Flower, Turnera Subulata, Fire Caterpillar, Oil Palm, Refugia Plants, Integrated Pest Management

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Bunga Pukul Delapan, Turnera Subulata, Ulat Api, Kelapa Sawit, Tanaman Refugia, Pengendalian Hama Terpadu================Eight O’clock Flower, Turnera Subulata, Fire Caterpillar, Oil Palm, Refugia Plants, Integrated Pest Management
Subjects:	Q Science > QK Botany S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture
Divisions:	Fakultas Sains Dan Teknologi > Agroteknologi
Depositing User:	Unnamed user with email repository@ulb.ac.id
Date Deposited:	02 Nov 2026 09:09
Last Modified:	02 Nov 2026 09:09
URI:	http://repository.ulb.ac.id/id/eprint/2956

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