The Diversity of Arthropods in Two Rice Plantation System Legowo at Takalar Regency
Rezky Surya (a) Fatahuddin (a) Itji Diana Daud (a)

a) Department of Plant Pest and Diseases, Faculty of Agriculture, Hasanuddin University, Makassar 90245, Indonesia

Abstract

The research objective was to determine the diversity of arthropods in the Legowo 2: 1 and Legowo 4: 1 systems of rice cultivation. The research was carried out from May to August 2019 at farmers^ rice fields in Polombangkeng Utara District, Takalar Regency and the Pest Laboratory, Department of Pests and Plant Diseases, Hasanuddin University Faculty of Agriculture. The rice varieties used were Ciherang which was planted in two separate rice fields using the Legowo 2: 1 and Legowo 4: 1 system. Observations were made using the ubinan system starting at the age of 21 DAS to 84 DAS with an observation interval of 7 days. The samples were taken by using used vacuum pump. The observations obtained when the rice plants were 21 and 28 DAS, namely that there were no insect pests in the two cropping systems. The highest insect pest population in the Legowo 2: 1 system was found when rice plants were 70 DAS from for 13 tails which are from genus: Leptocorisa, Nephotettix, Valanga, Nymphula and Scirpophaga. The highest insect pest population (22 individuals) was found in the Legowo 4: 1 system when the rice was 84 DAS with the same genus as that found in Legowo 2: 1. The highest population of predatory arthropods was spiders and was found to be the highest at 56 DAS (13 tails) in the Legowo 2: 1 system. At the age of 56 DAS, the highest number of arthropods (22 individuals) was found in the 4:1 Legowo system rice plants. The highest parasitoid populations of genus Stenobracon and Xanthopimpla were found in the Legowo system 2:1 at 49 DAS (4 individuals). The highest population of genus parasitoids: Stenobracon, Temelucha, Brachymeria, Pedicia and Argyrophylax in the 4:1 Legowo system was found at 77 DAS (6 individuals). Yields on rice planting using the Legowo 2:1 system were higher (5.6 tons/ha) compared to Legowo 4:1 (5.1 tons/ha).

Keywords: Rice, Legowo 2:1- Legowo 4:1- Predator- Parasitoid

Topic: Integrated Pest and Disease Management