Population Density of Small Cabbage Bug (Eurydema pulchrum Westw.) (Hemiptera: Pentatomidae) in Cabbage Plants of Batu Palano, West Sumatera

Aims: The objective of study was to study population density of Eurydema pulchrum in cabbage plants of Batu Palano, Agam, West Sumatera, Indonesia. Study Design: Purposive random sampling. Place and Duration of Study: The research was conducted in cabbage plants, Batu Palano, Agam regency, Wesy Sumatera, Indonesia and Laboratory of Pest, Faculty of Agriculture, Riau University, Pekanbaru, Indonesia from November 2022 to January 2023. Methodology: Purposive random sampling was used as method to collect E. pulchrum in the field. The area of cabbage plant field was 400 m2. E. pulchrum was collected by using sweep net and bare hand directly. Four locations were chosen as sampling locations. 10% of total plants of each location was determined as sampling plants. In each location, a diagonal imaginary line was made to determine sampling plants. ±67 plants in a diagonal line. The plants in diagonal line was determined systematically. The bugs in determined line was counted. The observation was conducted in 10.00-12.00 am for each location. Results: The population density of E. pulchrum in cabbage plants of Batu Palano was 0.06 individual/ plant. Conclusion: E. pulchrum status was not pest in cabbage plants of Batu Palano.