Diversity and Relative Abundance of Insect Pests in Cayenne Pepper Cultivation under Monoculture and Intercropping Systems

Muhammad Azwari, Ruth Stella Petrunella Thei, Amrul Jihadi, Abdul Halim Mursyidin

Abstract


Information on the effect of combining intercropping systems, refugia plants, and repellent plants on the insect pest community structure in cayenne pepper cultivation remains limited. This study aimed to analyze the diversity and relative abundance of insect pests in cayenne pepper (Capsicum frutescens L.) under monoculture and intercropping systems combined with refugia and repellent plants. The study was conducted from March–September 2025 in Kilang Village, East Lombok using a Randomized Block Design with six treatments and four replications. Insect sampling was carried out using Yellow Pan Traps, Pitfall Traps, and pheromone traps over 12 observation periods. Results showed that 758 individual insect pests were found belonging to 7 orders, 16 families, and 22 species. The pest community was dominated by Bactrocera spp., Liriomyza sp., and Thrips sp. The cayenne pepper monoculture treatment produced the highest number of pest individuals (220 individuals), while the cayenne pepper + tomato + lemongrass intercropping treatment produced the lowest (91 individuals). Meanwhile, the cayenne pepper + tomato + marigold treatment yielded the highest diversity index (H’ = 2.06) and the lowest dominance (D = 0.16), indicating the most stable insect community. The resultsindicate that the combination of intercropping, refugia, and repellent plants not only suppresses pest abundance but also enhances insect community stability in the cayenne pepper agroecosystem.

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DOI: https://doi.org/10.33096/agrogenesis.v2i1.1219

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