The Effect of Garengpung (Dundubia manifera) Insect Sound Intensity Level towards the Growth and Productivity of Rice (Oryza sativa) Plant Nur Kadarsiman a), Lu lu Rahayu b), and Wipsar Sunu Brams Dwandaru c)
Physics Education Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Karangmalang, Yogyakarta, 55281, Indonesia
Abstract
This study aimed to determine the effect of the sound intensity level (SIL) of garengpung (Dundubia manifera) insect
manipulated at a peak frequency of 4000 Hz on a horizontal plane towards the growth, stomata opening area, and
productivity of rice (Oryza sativa) plant. This study employed the garengpungs sound, which was validated using the
Octave 4.2.1 software. Lands used in the study were experimental and control lands- the area of each land was 30.0
m2 x 8.5 m2. The observed data included the rice plant growth, stomata opening area, and rice productivity. The stomata
opening area was observed using a light microscope and the output was observed using NIS Elements Viewer software.
In order to measure the area of the stomata, the Image Raster 3.0 was used. The productivity of the rice plant in the
form of the rice mass was measured using Origin 8.0 and Microsoft Excel 2013. The SIL was measured using a sound
level meter. The result of the study showed that the average growth of the experimental and the control plants at the
77th day after planting were as follow plant height 87.98 cm and 81.96 cm, numbers of tiller in one cluster 17 and 16,
and numbers of spikelet in one cluster 11 and 10, respectively. It was found that the productivity of the experimental
plant was better than the control plant. From 1763 and 1819 clusters of the experimental and control plants,
respectively, yielded 228.5 kg and 105.4 kg in total masses of rice. The SIL of the garengpungs sound was in the
interval of 62.1 dB to 79.4 dB.
