Peran Beberapa Refugia terhadap Tingkat Parasitasi Parasitoid Telur Spodoptera frugiperda J.E. Smith (Lepidoptera; Noctuidae)

Abstract

Fall Armyworm (S. frugiperda) is one of the main hosts of maize. Refugia plants are a pest control solution based on the IPM concept which provides a source of food for natural enemies, especially parasitoids. In this study, the proportion of S. frugiperda egg parasitoids on corn fields with refugia plants around it was calculated. This study used a randomized non-factor (RAK) consisting of R0 (corn plants without refugia/control plants), R1 (maize plants with red refugia) (Zinnia elegans), R2 (maize plants with yellow refugia) (Melanpodium paludosumi), R3 (Maize plant with white refugia) (Turnera subulata), R4 (Rice plant with white, yellow and red refugia) with 5 replications. The results of the study found 2 species of S. frugiperda egg parasitoids namely Telenomus remus (Hymenoptera: Scelionidae), Telenomus dignus (Hymenoptera: Scelionidae). The results showed that the average parasite level of the egg and grain groups of S. frugiperda (46,37% % dan 40,47%). Treatment maize with refugia of white flowers (T. subulata) present the highest parasitization rate of the egg group and eggs (92.85% and 76.14%). This study had a significant effect on the treatment of white refugia and 15 DAP (Day After Plant) mixture on the level of egg parasitoid parasitization. Larval parasitoids were not found to parasitize S. frugiperda larvae in this study. The highest dominance of egg parasitoids is Telenomus remus with an average of 0.202% and the lowest is Telenomus dignus 0.030%. The results also present that the treatment of refugia plants had a significant effect on the percentage of S.frugiperda attacks, namely at 12 DAP, 17 DAP and 22 DAP. The highest percentage of infected plants was in the control/without refugia treatment of 0.815 at 17 DAP, while the refugia plant treatment had no significant effect on the intensity of S. frugiperda larvae attack. The highest intensity (0.2346) was in treatment control/without refugia 12 DAP and the lowest (0.0038) in treatment R2 (yellow refugia) 37 DAP.