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The Potential of Telenomus remus Nixon (Hymenoptera: Scelinoidae) as Biocontrol Agent for the New Fall Armyworm S. frugiperda (Lepidoptera: Noctuidae) in Indonesia Sari, Adha; Buchori, Damayanti; Nurkomar, Ihsan
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.116.69-74

The fall armyworm Spodoptera frugiperda is an emerging new pest species in several Asian countries including Indonesia. This pest can be a threat to Indonesian agriculture because this pest has been reported to cause many losses in other countries. As a preemptive and ecofriendly control strategy, a research to study the performance of Telenomus remus as potential biocontrol agent of this pest was done in laboratory scale. Research was done by exposing an adult female to 50 eggs of S. frugiperda in a cluster. We also exposed the female parasitoid to another 50 eggs of S. litura in a cluster for comparison since this parasitoid had been reported as S. litura egg parasitoid in Indonesia previously. Results showed that there are no difference in the numbers of parasitized eggs, parasitism rate, survival rates and percent females of T. remus reared from both S. frugiperda and S litura, which implies the effectiveness of T. remus as a candidate for bio control agent for S. frugiperda.

EFFECT OF HOST-LARVAL DIET ON THE HOST ACCEPTANCE AND HOST SUITABILITY OF THE EGG PARASITOID Telenomus remus NIXON (Hymenoptera: Scelionidae) ON Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae) Sari, Adha; Buchori, Damayanti; Nurkomar, Ihsan
JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Vol. 21 No. 2 (2021): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.221158-165

Effect of host-larval diet on the host acceptance and host suitability of the egg parasitoid Telenomus remus Nixon (Hymenoptera: Scelionidae) on Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae). The life history of parasitoids is an important factor that can determine their ability to attack a host. The type of food consumed by the host can affect the ability of parasitoids such as host searching behavior, host suitability and host acceptance. In this research, we evaluate the effect of the S. frugiperda larvae diet on its suitability of the eggs produced by the adults for the egg parasitoid Telenomus remus. The research was studied on two types of egg masses of S. frugiperda that obtained from the moths that fed with natural or artificial diet during their larval stages. Parasitoid was reared from both types of hosts. An egg mass consisting of 50 S. frugiperda eggs from both types of hosts was exposed to one egg parasitoid female for 24 hours. S. frugiperda eggs then were reared until the parasitoid adult emerged. Each experiment was repeated 20 times. Host acceptance was observed through the host parasitism rate and its parasitization. Meanwhile, the host suitability was observed through the sex ratio of the emerging parasitoids. The results showed that S. frugiperda eggs reared using artificial diet had a higher parasitism rate (99.33%) than those of natural diet (82.53%). In contrast, the level of parasitization of S. frugiperda eggs reared using natural diet was higher (78.30%) than those of artificial diet (48.34%) because the number of emerging T. remus from S. frugiperda eggs reared using natural diet was also higher than those of artificial diet. However, the sex ratio (F:M) of emerging T. remus from S. frugiperda eggs reared using both of diet was female biased.

The Potential of Telenomus remus Nixon (Hymenoptera: Scelinoidae) as Biocontrol Agent for the New Fall Armyworm S. frugiperda (Lepidoptera: Noctuidae) in Indonesia Sari, Adha; Buchori, Damayanti; Nurkomar, Ihsan
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 8, No 2 (2020)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2020.116.69-74

The fall armyworm Spodoptera frugiperda is an emerging new pest species in several Asian countries including Indonesia. This pest can be a threat to Indonesian agriculture because this pest has been reported to cause many losses in other countries. As a preemptive and ecofriendly control strategy, a research to study the performance of Telenomus remus as potential biocontrol agent of this pest was done in laboratory scale. Research was done by exposing an adult female to 50 eggs of S. frugiperda in a cluster. We also exposed the female parasitoid to another 50 eggs of S. litura in a cluster for comparison since this parasitoid had been reported as S. litura egg parasitoid in Indonesia previously. Results showed that there are no difference in the numbers of parasitized eggs, parasitism rate, survival rates and percent females of T. remus reared from both S. frugiperda and S litura, which implies the effectiveness of T. remus as a candidate for bio control agent for S. frugiperda.

Diversity and community structure of predators in surjan (polyculture) and lembaran (monoculture) paddy fields Trisnawati, Dina Wahyu; Nurkomar, Ihsan; Antono, Andri; Puspitasari, Era
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 24 No. 2 (2024): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.224162-172

Predator diversity decreases because of low ecosystem quality in modern agriculture that applies monoculture systems. However, polyculture systems in paddy fields can improve biodiversity, including pests, natural enemies, and microorganisms. Surjan is a local polyculture farming practice that originated in Yogyakarta. This farming practice consists of raised beds for cultivating palawija or horticultural crops and sunken beds for rice cultivation. Surjan farming may have an impact on predatory diversity and abundance, although this has not been studied. To address this issue, research was carried out to investigate the diversity, abundance, and structure of the community of predators in the paddy fields of surjan (polyculture) and lembaran (monoculture). The field experiment was conducted in three pairs, surjan and lembaran, in Panjatan District, Kulon Progo Regency, Yogyakarta Special Region, Indonesia. In each field, five random plots arranged in a cross pattern were used to collect a sample of predators. Several traps, including sweeping, pitfall traps, yellow adhesive traps, and yellow pan traps, were used to determine the abundance and diversity of predators. Results showed that species diversity, abundance, species composition, and biodiversity index in surjan farming were significantly improved compared to lembaran farming. Ceratopogonidae and Formicidae were the most abundant families in both surjan and lembaran farming, although they are more abundant in surjan. It can be concluded from the study that surjan farming could improve ecosystem quality by implementing predators for pest management.

Elevation Affects the Development, Growth, and Cocoon Quality of Eri Silkworm Samia cynthia ricini Boisduval (Lepidoptera: Saturniidae) Nurkomar, Ihsan; Wahyu Trisnawati, Dina; Adi Nugraha, Yudha; Nur Aisyah, Siti; Cahya Endrawati, Yuni
HAYATI Journal of Biosciences Vol. 32 No. 4 (2025): July 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.4.1033-1038

Samia cynthia ricini is a species of silkworm whose survival, development, and cocoon quality are affected by its environmental factors such as elevation, which affects temperature and humidity. This study aimed to examine the impact of elevation on the survival, development time, cocoon shell weight, and fecundity of S. c. ricini. The research was performed at two sites with different elevations: highland and lowland regions. The findings indicated that S. c. ricini, reared in the highlands, had higher survival rates than those cultivated in the lowlands. Meanwhile, the developmental time of S. c. ricini reared in the lowlands was faster than in the highlands. Additionally, the cocoon shell weight of S. c. ricini reared in the lowlands was also heavier, and the total fecundity of the adults of S. c. ricini reared in the lowlands was higher than those reared in the highlands. This study recommends that S. c. ricini be reared in lowland settings for best results.

Effect of Diet Type and Population Density on the Biology of Samia cynthia ricini Boisduval (Lepidoptera: Saturniidae) Nurkomar, Ihsan; Dina Wahyu Trisnawati; Ibnu Fadillah Ramadhan
Andalasian International Journal of Entomology Vol. 3 No. 1 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijent.3.1.1-9.2025

The silkworm is an insect with high economic value due to its ability to produce cocoons, which are processed into silk fibers. Samia cynthia ricini is a type of silkworm relatively new to Indonesia. This insect can utilize various plants as feed, with castor leaves as the primary host and cassava leaves as the secondary host. However, information regarding the impact of diet type and population density on biological parameters, such as survival rate, development time, cocoon weight, and fecundity, remains limited. This study aims to evaluate the effects of diet type (castor and cassava leaves) and population density (20, 30, 40, and 50 individuals per container) on the biology of S. c. ricini. The research used a factorial randomized complete block design (RCBD) with two factors. Results indicated that diet type and population density significantly influenced the biological parameters of S. c. ricini. Silkworms fed castor leaves exhibited higher survival rates and heavier cocoon weights than those fed cassava leaves. Increased population density reduced survival rates, cocoon weights, and fecundity. The optimal population density for rearing was 30 individuals per container. These findings provide valuable insights for improving S. c. ricini rearing practices. Using castor leaves as the primary diet and maintaining an optimal population density of 30 individuals per container can enhance survival and cocoon quality. This information is particularly useful for small-scale and laboratory rearing efforts, contributing to the sustainable development of S. c. ricini cultivation and silk production.

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