Electronic Theses and Dissertation

Aplikasi campuran herbisida dapat meningkatkan efisiensi pengendalian gulma dan
mengurangi resistensi gulma terhadap herbisida. Pengendalian menggunakan herbisida
mempunyai keunggulan yaitu cepat dan efektif. Penelitian ini bertujuan untuk mengetahui
karakteristik gulma pada tanaman kedelai akibat aplikasi herbisida metribuzin, oksifluorfen,
dan pendimethalin secara tunggal dan campuran pada berbagai taraf dosis. Penelitian ini dilaksanakan di Desa Rumpet, Kecamatan Krueng Barona Jaya, Aceh Besar pada ketinggian 6 meter di atas permukaan laut (mdpl) dan Laboratorium Pengelolaan Gulma, Program Studi Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala, Banda Aceh. Penelitian ini dilaksanakan pada Juni sampai dengan September 2023. Penelitian ini
menggunakan Rancangan Acak Kelompok (RAK) pola non faktorial yang terdiri dari 9
perlakuan dan 3 ulangan. Peubah yang diamati persentase pengendalian gulma, persentase
penutupan gulma, spesies gulma, individu gulma, bobot kering gulma dan koefisien
komunitas. Aplikasi herbisida metribuzin, oksifluorfen dan pendimethalin berpengaruh terhadap
persentase pengendalian gulma, persentase penutupan gulma, spesies gulma, individu gulma
dan bobot kering gulma. Campuran herbisida metribuzin, oksifluorfen dan pendimethalin
dengan metribuzin 0,4 kg b.a ha-1+oksifluorfen 0,4 kg b.a ha-1+ pendimethalin 0,4 kg b.a ha-1
dapat meningkatkan persentase pengendalian gulma, menurunkan persentase penutupan
gulma, spesies gulma, individu gulma dan bobot kering gulma pada tanaman kedelai.
Adanya pergeseran komposisi gulma dari Ageratum conyzoides menjadi Panicum repens
yang menjadi dominan pada beberapa perlakuan.

Mixed application of herbicides can improve weed control efficiency and reduce weed resistance to herbicides. Control using herbicides has the advantage of being fast and effective. This study aims to determine the characteristics of weeds in soybean plants due to the application of metribuzin, oxifluorfen, and pendimethalin herbicides single and mixed at various dose levels. This research was conducted in Rumpet Village, Krueng Barona Jaya District, Aceh Besar at an altitude of 6 metres above sea level (masl) and Weed Management Laboratory, Agrotechnology Study Program, Faculty of Agriculture, Syiah Kuala University, Banda Aceh. This research was conducted from June to September 2023. This study used a non-factorial pattern Randomised Complete Block Design (RCBD) consisting of 9 treatments and 3 replications. The observed variables were percentage of weed control, percentage of weed cover, weed species, individual weeds, weed dry weight and community coefficient. Herbicide application of metribuzin, oxyfluorfen and pendimethalin affected the percentage of weed control, percentage of weed cover, weed species, individual weeds and weed dry weight. The mixture of metribuzin, oxifluorfen and pendimethalin herbicides with metribuzin 0.4 kg a.i ha-1 + oxifluorfen 0.4 kg a.i ha-1 + pendimethalin 0.4 kg a.i ha-1 can increase the percentage of weed control, reduce the percentage of weed coverage, weed species, individual weeds and weed dry weight in soybean crops. There was a shift in weed composition from Ageratum conyzoides to Panicum repens which became dominant in some treatments.