<![CDATA[P. xylostella is an important pest on cabbage plants in Merauke Regency because it can cause serious damage to cabbage plants at the start of planting. Severe attacks can damage the growing points of the cabbage plants, preventing the plants from forming heads. This study aims to determine the population and intensity of attack of P. xylostella on cabbage plants in Merauke Regency. The research was carried out in Tanah Miring District and Merauke District, Merauke Regency, Papua Province in September-December 2020. Observations were made on cabbage plantations that were two weeks old after being 2 transplanted from the nursery, then 10 plots were determined. Observations were made six times in the morning with one week intervals. The highest population average of 1.11 individuals was found in 6 WAP and the lowest population was in 1 MST of 0.11 individuals. The highest average damage was found at the 6 MST observation time of 59.17%, while the light damage was found at 1 MST of 8.33%. This shows that the low population of P. xylostella can cause damage to up to 8.33% of cabbage plants. The percentage of attack by P. Xylostella on cabbage in Tanah Miring District was 43.7%, while in Merauke District it was 15.5%. The high attack in Tanah Miring District is due to the availability of host plants throughout the growing season.]]>
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