PERKEMBANGAN POPULASI WERENG BATANG COKLAT NILAPARVATA LUGENS STAL DAN PREDATORNYA PADA BERBAGAI TEKNIK BUDIDAYA PADI

Arifin, M., I.B.G. Suryawan, B.H. Priyanto, dan A. Alwi. 1997. Perkembangan populasi wereng batang coklat Nilaparvata lugens Stal dan predatornya pada berbagai teknik budidaya padi. Jurnal Penelitian Pertanian, Fakultas Pertanian UISU. 16(1): 24-32.

Muhammad Arifin¹, Ida Bagus Gde Suryawan²,

Budi Hari Priyanto³, dan Asnimar Alwi⁴

¹ Balai Penelitian Bioteknologi Tanaman Pangan, Bogor,

² Instalasi Pengkajian Teknologi Pertanian Denpasar,

³ Pusat Penelitian dan Pengembangan Tanaman Pangan, Bogor,

⁴ Balai Penelitian Tanaman Rempah dan Obat, Bogor

Abstract

Development of Brown Planthopper, Nilaparvata lugens Stal Population and Its Predators at Different Cultural Techniques of Rice Production.  An experiment was conducted in irrigated rice field with a rice-rice cropping pattern in Pemalang district 1995/1996 planting season. The objective was to select a cultural technique that could stabilize brown planthopper (BPH) population. The experiment used a sub-sample design with a two-stage sampling method and a visual observation method of insect population. There were four treatment combinations of planting time (simultaneous and unsimultaneous) and insecticide (with and without insecticide application). Results indicated that during the planting season, the BPH population was relatively stable and fluctuated at a low level, i.e 3.1 - 10.5 hoppers/15 hills, and the predator population fluctuated at a high level, i.e. 9.8 - 23.1 predators/15 hills). At unsimultaneous planting time and without insecticide application, BPH and predator population were higher than those at simultaneous planting time and with insecticide application. At unsimultaneous planting time, the BPH population just before harvest was significantly increased. Therefore, it was suspected that the population would explode in the next planting season. It was concluded that the cultural technique with a combination of simultaneous planting time and without insecticide application was suitable to be applied at the time and location or the experiment. The insecticide application, especially at an unsimultaneous planting time, decreased farmer income and gave opportunity to BPH to explode.

Keywords:  Cultural technique, rice, predator, brown planthopper.

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