Diurnal and Nocturnal Insect Diversity in Sugar Cane Plantations in Paddy Area in Pagak District, Malang Regency

Department of Biology, Faculty of Mathematic and Natural Science, University of Islam Malang, Malang, Indonesia

^* Corresponding author: rizki.widhiana@gmail.com

Abstract

Paddy sugar cane plantations are a variation of the spatial layout of sugar cane plantations which have the characteristic that the land tends to be more humid. Insects are a part of the ecosystem and they play various ecological roles in it. Pagak District is a sugar cane-producing area with various types of land, one of which is paddy fields. This research aims to determine the diversity of diurnal and nocturnal insects on sugar cane plants in paddy fields in Pagak District, Malang Regency. This research was carried out in February – July 2023 on sugar cane plantations in the paddy fields of Pagak District, Malang Regency. The method used is a direct exploration method on 2 types of traps (yellow traps and light traps). The sampling technique was a purposive random sampling technique with varying times during the day and at night. Diversity index analysis in this study used the Shannon-Wiener formula. The results showed that in the yellow traps, the dominant species was Bactrocera dorsalis. Meanwhile, in the light traps, the dominant species is Scirpophaga nivella. Furthermore, the results of the analysis of the insect diversity index on sugar cane plants in paddy fields with temporal variations during the day are at a medium diversity level with a value of H' = 1.55. Meanwhile, sugar cane plants in paddy fields with night time variations are at a medium level of diversity with a value of H' = 2.56.