Kelimpahan Serangga Penghuni Tajuk pada Pertanaman Bawang Merah Semi Organik dan Konvensional

Abstract

The Shallot cultivation in Balige has been the last two years cultivated by farmers, some obstacles are found by farmers when farming shallot, such as pest and disease attacks. The frequency of pesticide applications have done intensively. This research was aimed to explore and compare the diversity of insects on the true seed of shallot cultivation with semi organic with conventional farming systems in the Balige plateau, Tobasa Regency. This research was conducted at Gurgur Experimental Garden, Balige and Plant Pest and Disease Laboratory, Faculty of Agriculture, University of Sumatera Utara. Medan in Agustus until Desember 2018. This research used three insect traps (Sweep Net, Yellow Sticky Trap, Hand Picking) and repeated for eight times. The results showed that the insects caught in each type of trap was different. The value of absolute density is 1397, and the value of absolute density in conventional cultivation is 1009. The value of insect diversity index of Shannon-Weiner (H') is 2,827 (moderate), the value of insect evennes index (E') is 0,716 (high) and the value of insect dominance (C) is 0,084, whereas on shallot plantations with conventional farm the value of insect diversity index of Shannon-Weiner (H') is 2,637 (moderate) and the value insect evennes index (E') is 0,711 (high) and the value of insect dominance (C) is 0,105.

Inventory and Analysis of Diversity of Insect on Shallot Cultivation in Saruran Hamlet, Enrekang Regency

“…Penelitian sejenis telah dilakukan oleh (Dharma et al, 2018) Lebih spesifik (Jasril et al, 2016) mengungkapkan keanekaragaman spesies dapat dipengaruhi oleh ketinggian tempat dan fase pertumbuhan tanaman. Meskipun penelitiannya dilakukan pada tanam padi, berdasarkan penelitiannya dapat disimpulkan indeks keanekaragaman Hymenoptera parasitoid paling tinggi pada dataran tinggi 3,198 dibandingkan dataran rendah 3,029.…”

Kelimpahan dan Keaneka Ragaman Serangan OPT Beserta Musuh Alimnya pada Pola Modukulturdan Polikultur Sawi Putih di Desa Batur, Kecamatan Getasan, Kabupaten Serang

“…Terjadinya penurunan produktivitas sawi putih dapat disebabkan oleh berbagai faktor, salah satu penyebab penurunan produktivitas yaitu karena adanya serangan hama. Organisme penganggu tanaman (OPT) merupakan faktor pembatas produksi tanaman di Indonesia baik tanaman pangan, hortikultura maupun perkebunan menurut Kadi, (2014) di jelaskan dalam (Dharma et al, 2018). Hama yang menyerang sayuran daun antara lain adalah ulat pemakan daun Spodoptera sp.…”