THE IMPACT OF CLIMATIC FACTORS ON DISPERSION OF RICE EAR BUG ON RICE PLANTATION (Case Study: Tasikmalaya Regency, West Java)
Irwan Santosa, Joko Wiratmo

Faculty of Earth Science & Technology
Bandung Institute of Technology
Email: joko.wiratmo[at]meteo.itb.ac.id

Abstract

This study aims to determine the effect of climate parameters on the extent of rice ear bug attack on rice plants in Tasikmalaya Regency, Province West Java. The climate parameters used in this study include temperature, relative humidity, rainfall, and wind. Rice productivity data were also taken into account to support the results of the study. The area of pest attack was used as the dependent variable and the climate parameter was used as the independent variable. Statistical analysis used is multiple linear regression, which will give results in the form of the influence of the independent variable on the dependent variable partially, and simultaneously, as well as the coefficient of determination (R2). A spatial plot of wind direction on the distribution of rice ear bug in West Java Province was also carried out, to see the effect of wind on the distribution of rice ear bug in Tasikmalaya Regency.
Based on the climogram, it is known that the optimum development time for rice ear bug is in the middle of June to early July. Regression analysis shows that temperature is a very influential climate parameter compared to other parameters on the area of pest attack, which is 60,5%. However, simultaneously the three parameters (temperature, relative humidity, and rainfall) affect pest attack by 83.1%. The winds that affect the distribution of the pest are JJA period with an average speed of 3-7 m/s.

Keywords: rice, bug, dispersion, climate parameters

Topic: Atmospheric Sciences