Kuswardani RA, Mardiana S, Suswati, Sihotang S. The Influence of Monoculture and Polyculture Planting Patterns on the Intensity of Pest Attacks by Helopeltis sp. on Arabica Coffee of the Sigarar Utang Variety in North Tapanuli Regency. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Dec. 20 [cited 2024 Dec. 14];9(12):11296-301. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/5924