Tingkat Parasitasi Parasitoid Telur Penggerek Batang Padi Kuning (Scirpophaga incertulas) di Kabupaten Purworejo

Wagiyanti, Dr. Ir. Arman Wijonarko, M.Sc.; Dr. Tri Harjaka, S.P.

2024 | Tesis | S2 Ilmu Hama Tumbuhan

Penelitian ini  bertujuan untuk mengetahui jenis dan tingkat parasitasi  parasitoid telur penggerek batang padi kuning (S. incertulas)  di Kabupaten Purworejo. Penelitian dilaksanakan di lima kecamatan di Kabupaten Purworejo yaitu : Purworejo, Gebang, Loano, Banyuurip dan Bener pada musim tanam I 2022/2023 dan musim tanam II 2023.  Metode penelitian dengan  mengambil 3 hamparan dari tiap kecamatan. Pengamatan  dilakukan pada persemaian dan fase vegetatif dari masing-masing hamparan.  Pengamatan dilaksanakan di lapangan dan laboratorium untuk mengetahui jumlah penggerek batang padi kuning,   jenis dan jumlah parasitoid serta tingkat parasitasinya. Setiap hamparan diambil sampel 10 petak persemaian pada fase semai dan lahan seluas 800 m² pada fase vegetatif umur 7-21 hari setelah tanam Pengamatan pada fase vegetatif dilakukan pada umur 1, 2 dan 3 minggu setelah tanam. Variabel yang diamati meliputi jumlah kelompok telur yang ditemukan, jenis dan jumlah parasitoid yang muncul dan tingkat parasitasinya. Hasil penelitian menunjukkan bahwa ada tiga jenis parasitoid telur yang memarasit  penggerek batang padi kuning (S. incertulas)  di Kabupaten Purworejo yaitu : Telenomus sp. Trichogramma sp., dan Tetrastichus sp. Tingkat parasitasi  untuk ketiga jenis parasitoid adalah Telenomus sp 14,79% pada musim tanam I dan 12,96% pada musim tanam II, Trichogramma sp 9,96% pada musim tanam I dan 6,30% pada musim tanam II, Tetrastichus sp 28,91 % pada musim tanam I dan 25,93% pada musim tanam II.

This study aims to determine the types and levels of parasitization of yellow stem borer (S. incertulas) egg parasitoids in Purworejo Regency. The research was conducted in five sub-districts: Purworejo, Gebang, Loano, Banyuurip, and Bener during the first planting season of 2022/2023 and the second planting season of 2023. The research method involved selecting 3 plots from each sub-district. Observations were carried out in the nursery and vegetative phases of each plot. Field and laboratory observations were conducted to determine the number of yellow stem borers, types and quantities of parasitoids, and their parasitization rates. Each plot sampled 10 nursery plots during the seeding phase and an area of 800 m² during the vegetative phase at 7-21 days after planting. Observations during the vegetative phase were conducted at 1, 2, and 3 weeks after planting. Variables observed included the number of egg clusters found, types and quantities of parasitoids emerged, and their parasitization rates. The findings of the study revealed that three types of egg parasitoids, namely Telenomus sp., Trichogramma sp., and Tetrastichus sp., parasitized the yellow stem borer (S. incertulas Walker) in Purworejo District. The parasitization rates for these parasitoids were as follows: Telenomus sp. was observed at 14.79% during planting season I and 12.96% during planting season II, Trichogramma sp. at 9.96% during planting season I and 6.30% during planting season II, and Tetrastichus sp. at 28.91% during planting season I and 25.93% during planting season II.

Kata Kunci : Parasitoid telur, Tingkat parasitasi.