Growth performance and resistance of four superior rice cultivars against stem borer (Lepidoptera, Pyralidae) in subak guama, Tabanan, Bali I B K Suastika(1*), I K Kariada(2), M A Wahyuni(3), M Ace Suhendar(1), M Budiartana(4), N K Winantari(5), M Yusron(2)
1)Research Centre for Food Crops, National Research and
Innovation Agency
*idab003[at]brin.go.id
2)Research Centre for Estate Crops, National Research and
Innovation Agency
3)Food Crops and Food Security Service, Bali Province
4)Technician, Research Centre for Ecology and Etnobiology,
National Research and Innovation Agency
5)Organization for Technology and Material, National
Research and Innovation Agency
Abstract
A field research was conducted determine growth performance and resistance of four superior rice cultivars against stem borer (Lepidoptera: Pyralidae) in subak guama. selanbawak village, Marga sub-distrik, Tabanan district, Bali. The aim of the study was to determine the growth performance and resistance of four new superior varietis (NSV) against rice stem borer (RSB). Parameters measured directly in the field included the agronomic component, the yield component and harvested dry graind (HDG) production, as well as the incidence and attack rate of RSB every 2 weeks starting at 2 weeks after planting (WAP) from a sample of 10 plant clumps per 400 m2 natural plot of vegetative phase 2-6 WAP ^sundep^ (dead hearts) and 8-10 WAP generative phase ^beluk^ (white ear hearts) with diagonal random sampling method. Data analysis used analysis of variance (ANOVA) and continued with the LSD test at the 5% level. The experimental design used was a randomized block design (RBD) using four NSV, namely Inpari 16, 32, 33, and Ciherang as controls with 6 replications. The research results show that application of Inpari 16, 32, and 33 in this research can increase production by up to 6,9% to 30,9%. The highest production was achieaved by variety of Inpari 32 (8.82 tons per hectare), followed by Inpari 33 (7.51 tons per hectare), and the lowest production was found for Inpari 16 (6.95 tons per hectare). The three varieties of Inpari 16, 32, and 33 showed susceptible to RSB with mild damage (≤- 11%), namely 0.56%, 0.6% and 0.32% respectively, while Ciherang (control), 0.45%.
