Pengaruh Perlakuan Benih dengan Insektisida Klorantraniliprol Terhadap Serangan Scirpophaga incertulas

Abstract

Perlindungan tanaman padi dari hama penggerek batang padi kuning (Scirpophaga incertulas) merupakan salah satu kunci dalam menurunkan risiko kehilangan hasil. Penelitian ini bertujuan menguji keefektifan klorantraniliprol sebagai perlakuan benih dalam mengendalikan hama penggerek batang padi kuning. Metode penelitian meliputi perendaman benih padi varietas Inpari 32 selama 48 jam, dilanjutkan dengan aplikasi insektisida klorantraniliprol melalui perlakuan benih sesuai dosis yang diuji, pemeraman benih selama 48 jam, dan pengujian daya kecambah di laboratorium. Selanjutnya, dilakukan penyemaian di lahan dengan introduksi kelompok telur S. incertulas pada 9 HSS dan pengamatan populasi larva pada 12, 15, 18, 21, dan 24 HSS. Fase pindah tanam pada 25 HSS dan telur S. incertulas diintroduksi kembali pada 3 HST lalu pengamatan anakan terserang sundep pada 7, 14, 21, 28, 35, dan 42 HST. Hasil penelitian menunjukkan pada fase persemaian larva hanya ditemukan pada kontrol (5 larva pada 18 HSS, 1 larva pada 21 HSS, dan 1 larva pada 24 HSS). Pada fase vegetatif, perlakuan benih insektisida klorantraniliprol dengan dosis 3 ml, 4,5 ml, dan 9 ml secara signifikan menekan proporsi anakan terserang sundep di bawah ambang ekonomi hingga 28 HST. Pada 35 serta 42 HST tingkat serangan <10% pada seluruh perlakuan. Dosis anjuran 3 ml/500 gram benih efektif menekan serangan S. incertulas secara konsisten hingga 42 hari setelah tanam.

Protection of rice plants from the yellow rice stem borer (Scirpophaga incertulas) is one of the keys to reducing the risk of yield loss. This study aims to evaluate the effectiveness of chlorantraniliprole as a seed treatment in controlling yellow rice stem borer. The research method included soaking rice seeds of the Inpari 32 variety for 48 hours, followed by the application of chlorantraniliprole insecticide through seed treatment according to the tested dose, soaking the seeds for 48 hours, and testing germination in the laboratory. Next, seeding was carried out in the field with the introduction of S. incertulas egg clusters at 9 DAS and observation of larval populations at 12, 15, 18, 21, and 24 DAS. The transplanting phase at 25 DAS and S. incertulas eggs were reintroduced at 3 DAT followed by observations of seedlings infested with sundep at 7, 14, 21, 28, 35, and 42 DAT. The results showed that in the nursery phase, larvae were only found in the control (5 larvae at 18 DAS, 1 larvae at 21 DAS, and 1 larvae at 24 DAS). In the vegetative phase, chlorantraniliprole insecticide seed treatment at doses of 3 ml, 4.5 ml, and 9 ml significantly reduced the proportion of dead heart below the economic threshold until 28 DAT. At 35 and 42 DAT, the attack rate was <10% in all treatments. The recommended dose of 3 ml/500 grams of seed was effective in suppressing S. incertulas attacks consistently until 42 days after transplanting.