Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Pengaruh Lama Penyimpanan Ekstrak Biji Barringtinia Asiatica (L) Kurz (Lecythidaceae) Terhadap Toksisitasnya Pada Larva Crocidolomia Pavonana (F) (Lepidoptera : Pyralidae)

Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu penyimpanan sediaan ekstrak Barringtinia asiatica terhadap toksisitas sediaan tersebut pada larva Crocidolomia pavonana. Penelitian ini dilakukan di Laboratorium Pestisida dan Teknik Aplikasi, Hama dan Penyakit Tumbuhan, Fakultas Pertanian, Universitas .Padjadjaran. Sediaan insektisida yang diuji yaitu formulasi 30 L (Liquid), 30 L + Sinergis, 30 WP (Wettable Powder), 30 WP + Sinergis dan Kontrol. Setiap formulasi disimpan selama 0, 112, 133, 145, dan 175 hari. Formulasi disimpan dalam botol transparan 30 ml, ditutup dan disimpan dalam ruangan dengan temperatur antara 22,8-26,7 °C. Toksisitas formulasi ekstrak Barringtinia asiatica diuji terhadap larva Crocidolontia pavonana, kemudian diamati mortalitasnya dari instar II-TV. Hubungan lama penyimpanan setiap formulasi insektisida dengan mortalitas serangga uji dianalisis menggunakan analisis regresi-korelasi. Hasil percobaan menunjukkan bahwa toksisitas formulasi ekstrak Barringtinia asiatica terhadap larva Crocidolomia pavonana menurun setelah disimpan selama 175 hari. Penambahan ekstrak biji wijen sebagai bahan sinergis relatif memperpanjang waktu simpan dan meningkatkan toksisitas formulasi Barringtinia asiatica. Toksisitas formula Tepung (WP) lebih stabil dibandingkan formula Liquid (L).

The objective of this research was to examine the effect of storage time on toxicity effect of formulation of Barringtinia asiatica seed extract against Crocidolomia pavonana larvae. The experiment was carried out in The Pesticide Laboratory, Plant Protection Department, Agriculture Faculty, University Padjadjaran. The treatment were the application of 30 L (Liquid) formulations, 30 L+ Sesame extract, 30 WP (Wettable Powder), 30 WP + Sesame extract, and control. Each formulations were stored in duration of 0, 112, 133, 145 and 175 days. The formulations were stored in 30 ml transparent bottle at a room temperature between 22.8-26.7 °C. The toxicity of Barringtinia asiatica extract formulations was tested against instar II of Crocidolomia pavonana, then mortality of Crocidolomia pavonana instar II-IV was recorded. The correlation of duration storage time of each insecticides formulation and mortality of test insect analyzed by Regretion-Corelation. Result of the research showed that the toxicity of seed extract formulation of Barringtinia asiatica tends to decrease after duration storage at 175 days. The addition of sesame seed extract lengthen the srorage time and increasing the toxicity of Barringtinia asiatica extract insecticide formulations. Based on mortality test insect, the wetable powder (WP) formulation was more stable than liquid (L) formulation.