Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Andalasian International Journal of Entomology Dinamika Pertanian
Reflinaldon
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Immunology & microbiology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Altitudinal Variation in Trap-Based Abundance of Bactrocera dorsalis in Red Chili Fields of West Sumatra, Indonesia Nguyễn, Phước Sang; Novri Nelly; Reflinaldon
Andalasian International Journal of Entomology Vol. 4 No. 1 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijent.4.1.31-39.2026

Abstract

Altitudinal gradients strongly influence the distribution and abundance of insect pests by affecting microclimate, host availability, and cropping intensity. Bactrocera dorsalis (Hendel) is a major constraint to red chili (Capsicum annuum L.) production in Indonesia; however, empirical evidence linking altitude to its field abundance in Sumatra has not been fully elucidated. This study quantified the association between altitude and the abundance patterns of B. dorsalis using field data collected from 33 chili-growing sites across four regencies of West Sumatra, Indonesia, spanning elevations from <15 to 1,571 m above sea level, during the rainy season (October 2024-March 2025). Adult flies were monitored using methyl eugenol-baited modified Lynfield traps. Catch data were analyzed across altitudinal zones using ANOVA, correlation, and linear regression. Trap catches differed significantly among elevation categories (p< 0.05), with higher mean abundance generally recorded in pre-montane sites (>600 m) than in lowland sites (<600 m). Regression analysis indicated a positive association between altitude and trap catches (r = 0.391, p = 0.024), with altitude explaining 15.3% of the variation in abundance (R2 = 0.153), and linear regression indicated a moderate increase in captures with increasing elevation (B = 0.103). K-means clustering of regencies based on mean elevation and total trap catches further separated Solok as a distinct group characterized by higher abundance. These findings demonstrate spatial structuring of B. dorsalis abundance across elevation zones and support the incorporation of elevation-informed surveillance into fruit fly monitoring programs in West Sumatra.
Virulensi Beberapa Isolat Metarhizium anisopliae Terhadap Telur Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae): Virulence of Various Isolates of Metarhizium anisopliae Against the Eggs of Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae) aprilia, Puja; Trizelia; Reflinaldon
DINAMIKA PERTANIAN Vol. 42 No. 1 (2026): Jurnal Dinamika Pertanian Edisi April 2026
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2026.vol42(1).28143

Abstract

Background: Spodoptera frugiperda is a pest that causes damage and economic losses to corn plants. One of the biological agents that can be used to control S. frugiperda is the entomopathogenic fungus Metarhizium anisopliae. Objective: This study aimed to determine the most virulent isolate of M. anisopliae against S. frugiperda eggs and to evaluate its effect on larval development. Methods: This study used an experimental method with a Completely Randomized Design (CRD) consisting of 5 treatments and 5 replications. The treatments were (A) M. anisopliae C5IA, (B) M. anisopliae SRJ, (C) M. anisopliae 3B, (D) M. anisopliae Metatek, and (E) control (without fungal treatment). The conidial density used was 10⁸ conidia/ml. The fungus was applied to egg masses of S. frugiperda using a spraying method. The parameters observed were percentage of unhatched eggs, mortality of first instar larvae, percentage of pupae formed, and percentage of adults formed. Data were analyzed using analysis of variance (ANOVA) followed by LSD test at the 5% significance level. Results: All tested isolates of the entomopathogenic fungus M. anisopliae caused egg mortality and affected the life development of S. frugiperda. The percentage of unhatched eggs ranged from 41.92% to 92.00%. The most virulent isolate was M. anisopliae 3B, which was able to control eggs with an unhatched egg percentage of up to 92.00% Conclusions: The isolate M. anisopliae 3B was the most virulent isolate against eggs of S. frugiperda and has potential to be developed as a biological control agent for fall armyworm management.
Co-Authors Aprilia, Puja Nguyễn, Phước Sang NOVRI NELLY Trizelia .