KEPADATAN POPULASI DAN TINGKAT SERANGAN WALANG SANGIT (Leptocorisa oratorius F.) PADA TANAMAN PADI SAWAH DI KECAMATAN BAYANG KABUPATEN PESISIR SELATAN

Eka, Ningtias Yulia Safitri (2017) KEPADATAN POPULASI DAN TINGKAT SERANGAN WALANG SANGIT (Leptocorisa oratorius F.) PADA TANAMAN PADI SAWAH DI KECAMATAN BAYANG KABUPATEN PESISIR SELATAN. Diploma thesis, Universitas Andalas.

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Abstract

KEPADATAN POPULASI DAN TINGKAT SERANGAN WALANG SANGIT (Leptocorisa oratorius F.) PADA TANAMAN PADI SAWAH DI KECAMATAN BAYANG KABUPATEN PESISIR SELATAN Abstrak Walang sangit (Leptocorisa oratorius F.) merupakan hama utama yang banyak merugikan pada pertanaman padi (Oriza sativa L.). Penelitian bertujuan untuk mengetahui kepadatan populasi dan tingkat serangan walang sangit (Leptocorisa oratorius F.) pada pertanaman padi di Kecamatan Bayang, Kabupaten Pesisir Selatan. Penelitian dilakukan pada tiga Nagari, yaitu Nagari Pasar Baru, Nagari Gurun Panjang dan Nagari Sawah Laweh. Penelitian menggunakan metode survey dengan pengambilan sampel secara acak terpilih.Parameter yang diamati adalah kondisi lahan penelitian, populasi walang sangit, kelompok telur, persentase malai terserang per rumpun dan persentase gabah yang terserang per petakan sampel. Berdasarkan hasil penelitian populasi walang sangit di Kecamatan Bayang sudah berada di ambang ekonomi karena populasi walang sangit sudah lebih dari 10 ekor/m2. Hasil penelitian menunjukkan bahwa kepadatan populasi walang sangit dan tingkat serangan tertinggi terdapat di Nagari Sawah Laweh. Kata kunci : kepadatan populasi, padi, tingkat serangan, walang sangit POPULATION DENSITY AND ATTACK RATE OF RICE BUG (Leptocorisa oratorius F.) ON RICE PLANTATION OF BAYANG DISTRICT PESISIR SELATAN REGENCY Abstract Rice bug (Leptocorisa oratorius F.) is a major pest of rice plantation (Oriza sativa L.). The research aimed to determine population density and attack rate of rice bug on rice plantation of Bayang district Pesisir Selatan regency. The research was conducted in three places were Nagari Pasar Baru, Nagari Gurun Panjang and Nagari Sawah Laweh. Survey conducted with a purpose random sampling. The parameters were rice plantation conditions, population density, egg group, percentage of panicle attacked, and grain attacked. Based on the result of the research showed that population of rice bug in Bayang district was already on the economic threshold because the population of the rice bug was more than 10 individu/m2. The result showed that the highest population density and attack rate was found in Sawah Laweh region. Keywords : population density, rice, attack rate, rice bug

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