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INDONESIA
JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Published by Universitas Lampung
ISSN : 14117525     EISSN : 24610399     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Hama dan Penyakit Tropika (JHPT Tropika) publishes articles in plant pests, plant pathogens, plant damage caused by those pests and pathogens and or their management in tropical areas. In addition to basic and applied research papers, JHPT Tropika publishes short communication that have not been published. Before being accepted for publication, all manuscripts must be peer reviewed. The journal is published sixmonthly in March and September.
Arjuna Subject : -
Articles 532 Documents
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Kaplan-meier-based survival analysis of Cylas formicarius following exposure to stored Metarhizium anisopliae formulations Lapinangga, Nina; Bunga, Jacqualine Arriani; Sonbai, Jemrifs Herkanus Hati; da-Lopez, Yosefus Frederikus
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 26 No. 1 (2026): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLANT PE
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.126190-199

Abstract

The sweet potato weevil (Cylas formicarius) is a major pest of sweet potato crops, particularly in tropical regions. The entomopathogenic fungus Metarhizium anisopliae is a promising biological control agent; however, its application is often constrained by reduced viability during storage. This study evaluated the efficacy of a dry powder formulation of M. anisopliae stored under ambient tropical conditions for 1 to 6 months. Bioassays assessed conidial density, adult mortality, lethal time to kill 50% of the population (LT₅₀), and survival probability using Kaplan–Meier analysis. Formulations stored for up to 3 months maintained high efficacy, with mortality rates exceeding 82.9%, conidial densities above 2.5 × 10⁸ conidia/g, and LT₅₀ values below 120 hours. In contrast, storage beyond three months significantly reduced conidial viability, increased LT₅₀, and decreased mortality. Kaplan–Meier survival curves showed a clear decline in virulence with increasing storage duration, with the 6-month formulation exhibiting the slowest mortality progression. Significant differences in survival probabilities among storage durations were confirmed statistically (p < 0.05). Morphological observations confirmed fungal-induced mortality, characterized by cuticle darkening, tissue softening, mummification, and external sporulation. Conidial deterioration over time was likely associated with physiological factors such as oxidative stress, lipid peroxidation, and depletion of protective compounds including trehalose and mannitol. Overall, storage duration critically affected the bioefficacy of M. anisopliae. It is therefore recommended that dry formulations be used within three months of production to ensure optimal pest control. These findings provide practical guidance for improving fungal biopesticide shelf life in tropical integrated pest management programs.
Augmentorium devices: A sanitation tools for control fruit flies and augmentation parasitoids of fruit flies on chilli plants Wildan Muhlison; Irwanto Sucipto; Ahmad Tantowi; Muhammad Usman; Ichsan Luqmana Indra Putra
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 26 No. 2 (2026): 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.226280-289

Abstract

Fruit flies, Bactrocera spp. (Diptera: Tephritidae), cause severe yield losses in chili production and conventional insecticide-based control raises environmental and resistance concerns. To our knowledge, this study was the first field evaluation in Indonesia to measure the mesh size threshold for an augmentorium that simultaneously retains newly emerged adult Bactrocera insects and allows for the release of naturally occurring parasitoids. This research aimed to identify fruit fly parasitoid species found in chili (Capsicum frutescens L.) fields and recommend mesh sizes that would enable parasitoids to pass through augmentation devices. This study was conducted in Balung District and the Agrofarmaka Laboratory of Jember University, Jember Regency, East Java, Indonesia. Infested chili fruits were placed in augmentorium devices fitted with four mesh diameters 0.5 mm/32 Mesh; 0.75 mm/24 Mesh; 1 mm/16 Mesh; and.5 mm/12 Mesh. Observations were made by identifying parasitoid species and counting the number of emerging parasitoids. The results showed the presence of two parasitoids, Psyttalia fijiensis and Trichopria sp., which successfully emerged from samples and passed through the meshes. P. fijiensis was able to traverse only the largest mesh (1.5 mm), whereas Trichopria sp. passed even the smallest mesh (0.5 mm). Based on these results, the 1.5 mm (12-mesh) augmentorium optimizes its dual function as a sanitation tool for fruit infested with fruit flies and as a parasitoid augmentation in chili cultivation. This evidence supports the practical application of augmentorium as a landscape-scale celement in integrated pest management for Bactrocera spp. is supported by this evidence.

Page 54 of 54 | Total Record : 532

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