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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 521 Documents
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Screening, genetic diversity of aiiA gene in AHL-lactonase producing bacteria and their potential to suppress the virulence factors of Ralstonia syzygii subsp. indonesiensis Edelwinna, Tiara; Giyanto, Giyanto; Nawangsih, Abdjad Asih
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225287-297

Abstract

Ralstonia syzigii subsp. indonesiensis (Rsi) is a causal pathogen of Phylotype IV within the Ralstonia solanacearum species complex, commonly found in chili plants. This pathogenic bacterium uses a quorum sensing (QS) mechanism that relies on N-acyl homoserine lactone (AHL) signals to regulate the expression of virulence genes, such as those encoding exopolysaccharides (EPS). Biological control of Rsi can be achieved by disrupting its QS system. The aim of this study was to isolate AHL-lactonase-producing bacteria, analyze the genetic diversity of their aiiA gene, and evaluate their effectiveness in suppressing EPS production in Rsi. The research involved sampling, isolating, and screening bacterial candidates from chili plants as AHL-lactonase producers using bioassays and molecular techniques, followed by evaluation of their ability to inhibit EPS expression as a virulence factor of Rsi. Bacterial samples were isolated from Brebes, Bandung, and Garut Regencies. Molecular identification revealed that the twelve selected isolates belonged to the genus Bacillus. Sequencing results showed genetic diversity in the aiiA gene among isolates obtained from regions with different altitudes. All isolates demonstrated the ability to suppress Rsi virulence factors.
Application of biocontrol products Bio P60 and Bio T10 as single or in combination in suppressing chili fruit anthracnose in the field Mugiastuti, Endang; Hidayat, Fitrian; Sastyawan, Murti Wisnu Ragil; Leana, Ni Wayan Anik; Soesanto, Loekas
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225230-240

Abstract

This study aimed to evaluate the effectiveness of single or combined applications of Bio P60 and Bio T10 products in suppressing anthracnose disease in chili pepper under field conditions. The research was conducted at an altitude of 1200 m above sea level using a randomized block design with five treatments: control, chemical fungicide, Bio P60, Bio T10, and a combination of Bio P60 and Bio T10, each replicated five times. Observed variables included incubation period, disease incidence, disease intensity, area under disease progress curve (AUDPC), infection rate, plant height, number of leaves, time of first flower, time of first fruit, number of fruits, fruit weight per plant, harvest weight per plot, and qualitative phenolic compound content. The results showed that the combined application of Bio P60 and Bio T10 was the most effective, delaying the incubation period, suppressing disease intensity, and reducing AUDPC by 13.71%, 69.34%, and 47.06%, respectively, compared to the control. The combination treatment also enhanced plant growth and yield, increasing plant height, number of fruits, fruit weight per plant, and harvest weight per plot by 27.38%, 62.65%, 90.85%, and 82.99%, respectively. Furthermore, the application of Bio P60, Bio T10, and their combination increased phenolic compound content qualitatively in chili pepper plants.
Insecticide application effect on ground dwelling arthropods in edamame crops Hasibuan, Rosma; Cindowarni, Olivia; Kamal, Muhammad; Purnomo, Purnomo; Karyanto, Agus
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225262-274

Abstract

Ground-dwelling arthropods play many important roles in agroecosystems. This experiment was conducted to assess the effects of botanical and synthetic insecticides on soil arthropods in edamame crops. The study included six treatments: soursop leaf extract at concentrations of 1% and 2%, diflubenzuron at concentrations of 0.05% and 0.1%, a common synthetic insecticide (chlorantraniliprole 0.15%), and a control (untreated plants), each with three replications. Pitfall traps were used to sample soil arthropods. A total of 2222 soil arthropods were collected, consisting of 1443 (64.94%) predatory arthropods and 778 (35.06%) detritivorous arthropods. The dominant orders of predators and detritivores were Araneae (61.5%) and Coleoptera (40.2%), respectively. The highest numbers of predatory and detritivorous arthropods were found on edamame plants sprayed with soursop extract, while the lowest numbers were recorded on plants treated with the common synthetic insecticide chlorantraniliprole. These results indicate that chlorantraniliprole negatively impacts the presence of ground-dwelling arthropods in edamame agroecosystems. In contrast, the application of the botanical insecticide (soursop leaf extract) and the synthetic insect growth regulator (diflubenzuron) did not reduce the abundance or diversity of ground-dwelling arthropods in edamame fields.
Assessment of cassava mosaic disease (CMD) intensity and whitefly (Bemisia tabaci) population in Cameroon based on field surveys Bahoya, Joseph Aime Lauryn; Levai , Lewis Dopgima; Fogang, Patrick Kenfack; Monono , Ekwa Yawa; Neba , Desmond Ngwa; Tiendrébéogo, Fidèle; Tchoumbougnang , François; Niemenak , Nicolas; Obiageli , Angela Eni; Pita , Justin Simon; Doungous, Oumar
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225361-380

Abstract

Cassava mosaic disease (CMD) remains a major constraint to cassava (Manihot esculenta Crantz) production in Cameroon. This study aimed to generate updated epidemiological data on CMD across the country. Surveys were conducted in 342 fields across the ten administrative regions of Cameroon between January and September 2022, following a standardized protocol adopted by all fourteen countries participating in the Central and West African Virus Epidemiology for Food Security (WAVE) program. In each field, 30 plants were assessed for CMD incidence, severity, whitefly population, and mode of infection. CMD symptoms were observed in all ten regions. The overall mean CMD incidence was 54.72%, with a mean severity score of 2.39. Incidence, severity, and whitefly populations varied significantly among regions. The South Region recorded the highest mean incidence (74.34%), while the Far North had the lowest (18.97%). The Adamawa Region exhibited the highest mean severity (2.63), whereas the South West Region had the lowest (2.19). Whitefly abundance per plant was greatest in the South West (21.44) and lowest in the Far North (0.40). PCR amplification and sequencing confirmed the presence of cassava mosaic geminiviruses (CMGs) in leaf samples. A positive correlation was detected between mean whitefly abundance and CMD incidence, while altitude was negatively correlated with whitefly numbers. Both CMD incidence and whitefly populations were higher in intercropped fields than in monocropped fields. Notably, intercropping cassava with maize reduced whitefly populations, while intercropping with sweet potato lowered CMD incidence. The primary source of CMD infection was the use of infected cuttings. These findings provide valuable insights for the development of targeted interventions and improved management strategies for CMD in Cameroon.
Efficacy of phosphonic acid applied by spraying and seed treatment at various concentrations for controlling downy mildew disease in maize Ginting, Cipta; Pramesti, Elisa Amelia; Maryono, Tri; Sudarsono, Hamim; Susanto, Herry; Akin, Hasriadi Mat
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225328-336

Abstract

Downy mildew, caused by Peronosclerospora spp., is one of the major problems in maize cultivation. Several studies have reported the development of resistance in Peronosclerospora spp. to metalaxyl, which had previously been an effective control method for the disease. Other research suggests that the efficacy of phosphonic acid in controlling downy mildew in maize is inconsistent. The objective of this study was to evaluate the efficacy of seed treatment with phosphonic acid in controlling downy mildew in Bisi 18 maize. The treatments were arranged in a randomized block design with six replications. The observed variables included the incidence and severity of the disease, the area under the disease progress curve (AUDPC), maize yield, and the content of tannin and hydroquinone compounds in maize leaves. The results showed that both phosphonic acid applied by spraying and seed treatment significantly reduced the incidence and severity of downy mildew (P < 0.05). However, the concentrations of phosphonic acid used in seed treatment had no significant effect on the disease during 1–7 weeks after inoculation. Furthermore, all phosphonic acid treatments tended to increase the content of tannin and hydroquinone compounds in maize leaves, which should be confirm quantitatively.
Molecular identification of fungi and the types of toxins produced from contaminated corn grain in Satui, Tanah Bumbu, South Kalimantan, Indonesia Salamiah, Salamiah; Mariana, Mariana; Marsuni, Yusriadi; Pramudi Indar, Muhammad; Sepe, Muslimin; Aphrodyanti, Lyswiana; Abbas, Saipul
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225337-349

Abstract

Fungal contamination in stored corn grain not only reduces grain quality but alsoposes risks to animal and human health due to mycotoxin production. This study highlights the importance of early detection and identification of fungal pathogens in corn as a key aspect of plant protection and postharvest management, as well as the need to determine the types and concentrations of toxins produced. Corn samples were collected from a storage warehouse in Satui Village, Kota Baru Regency, South Kalimantan. Fungal isolation was conducted at the Phytopathology Laboratory, Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Lambung Mangkurat. PCR analysis and gene sequencing were performed at the Genetics Sciences Laboratory, Jakarta, while toxin type and content analyses were carried out at the Animal Husbandry Laboratory, Universitas Gadjah Mada, Yogyakarta. From 11 microbial isolates obtained from corn grain, only one fungal species was identified, namely Aspergillus flavus. This species was found to produce 8.00 ppb of aflatoxin, which remains below the established safety thresholds of 15 ppb for B1 and 20 ppb for total aflatoxins.
In vitro antifungal activity of trembesi leaf extract [Samanea saman (Jacq.) Merr.] against Colletotrichum magnum Rossman & Allen, the causal agent of papaya anthracnose Ratnasari, Athalia; Darmadi, Anak Agung Ketut; Inabuy, Fainmarinat selviani; Sudatri, Ni Wayan
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225317-327

Abstract

Papaya fruit production in Bali has decreased over the last three years (2020-2022). One of the contributing factors is infection by Colletotrichum spp., which causes anthracnose. Anthracnose is an airborne disease that infects various plant commodities including papaya. The use of chemical fungicides to control anthracnose can have negative impacts if used long-term. Trembesi [Samanea saman (Jacq.) Merr.] extract has previously been reported to possess antifungal, antiseptic, antibacterial, and antidiabetic properties. This study aimed to determine the effectiveness and category of inhibitory activity, Minimum Inhibitory Concentration (MIC), Lethal Concentration 50% (LC??), and the phytochemical content of trembesi leaves. Methanol extract of trembesi leaves effectively inhibited the growth of Colletotrichum magnum at a concentration of 5%. The experiment used 11 treatments with 4 replications, including control (0% v/v) and extract concentrations of 1% to 10% (v/v), along with a positive control. The corresponding inhibition zone diameters were: 0.00 mm, 12.00 mm, 11.87 mm, 13.62 mm, 16.00 mm, 19.62 mm, 15.75 mm, 16.87 mm, 17.87 mm, 17.87 mm, 18.25 mm, and 20.87 mm, respectively. The minimum concentration of extract showing inhibitory activity (MIC) was 0.3%, while the LC?? value was 0.32%. Phytochemical screening revealed the presence of phenolics, tannins, alkaloids, steroids, terpenoids, flavonoids, and saponins in the trembesi leaf extract.
The potential in consortium of endophytic bacteria for controlling sheath blight by Rhizoctonia solani Kuhn in rice plants Rahma, Haliatur; Resti, Zurai; Yusniwati, Yusniwati; Nasution, Fauzan Abid Hanif
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225218-229

Abstract

Rhizoctonia solani Kühn is a pathogenic fungus that causes sheath blight disease in rice. One effective strategy for managing this disease is the use of biological control, particularly through consortia of endophytic bacteria. This study aimed to identify the most effective endophytic bacterial consortium for suppressing sheath blight severity while also enhancing rice growth and yield. A Completely Randomized Design (CRD) was aemployed with six treatments, three replications, and three experimental units per treatment. The treatments included four bacterial consortia composed of combinations of Bacillus thuringiensis LmD13, Ochrobactrum intermedium LmB1, and Stenotrophomonas maltophilia LmB35, along with positive and negative controls. The experiment involved treating rice seeds and soaking seedling roots with the bacterial consortia before transplanting. R. solani was inoculated onto the rice leaf sheaths 40 days after planting. The effectiveness of each consortium as a biocontrol agent was evaluated based on incubation period, disease incidence, disease severity, and the area under the disease progress curve (AUDPC). Their biostimulant potential was assessed through parameters related to seedling growth, plant development, and yield. Results indicated that the endophytic bacterial consortia effectively suppressed sheath blight and significantly improved rice growth and production. Notably, the consortium of B. thuringiensis LmD13, O. intermedium LmB1, and S. maltophilia LmB35 extended the incubation period to 35 days post-inoculation and reduced disease incidence, severity, and AUDPC to 22.22%, 0.29%, and 1.01, respectively. This consortium also enhanced rice yield, with fresh and dry grain weights reaching 72.78 g and 63.02 g, respectively, compared to the positive control. These findings suggest that this bacterial consortium holds strong potential as a biocontrol agent and yield enhancer in rice cultivation.
Western flower thrips Frankliniella occidentalis Pergande (Thysanoptera: Thripidae): A newly recorded invasive species in Indonesia Hutapea, Dedi; Sartiami, Dewi; Dadang, Dadang; Hidayat, Purnama
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225309-316

Abstract

The most economically important invasive thrips species, known for causing serious damage to various crops through feeding and virus transmission, was recorded in the cut flower production center of West Java Province, Indonesia. Thrips specimens were collected from chrysanthemum plastic houses using sweep nets, beating trays, yellow pan traps, and hand vacuums. Based on morphological characteristics, the specimens were identified as Frankliniella occidentalis Pergande 1895 (Thysanoptera: Thripidae). Infestation levels in chrysanthemum ranged from 9 to 15 individuals per plastic house. This is the first confirmed report of F. occidentalis infesting chrysanthemums in Indonesia, as the species has not been previously recorded in the country. It can be distinguished from other thrips species by its unique morphological traits, including comb-like setae on the eighth abdominal tergite and distinctive chaetotaxy patterns on the head and pronotum.
Maize induced resistance against downy mildew mediated by benzoic acid increased photosynthesis rate and chlorophyl content Habibullah, Muhammad; Joko, Tri; Wibowo, Arif; Widiastuti, Ani
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): 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.225255-261

Abstract

Maize downy mildew, caused by Peronosclerospora spp., is a major disease affecting maize cultivation in tropical regions, particularly in Indonesia. One potential control strategy is the induction of plant resistance. Previous studies have demonstrated that benzoic acid (BA), a non-fungicidal chemical compound, can induce maize resistance against downy mildew. Induced resistance mechanisms do not directly inhibit pathogen development but enhance the plant’s defensive response to infection. This study utilized various maize lines, ranging from susceptible to resistant, to evaluate the impact of BA-induced resistance on photosynthesis rate and chlorophyll content as the key agronomic parameters associated with the plant growth. The results showed that BA treatment did not significantly increase the photosynthetic rate and chlorophyll content in moderately resistant and resistant maize lines. However, in susceptible and moderately susceptible lines, BA treatment enhanced both parameters, indicating its role in strengthening plant resistance. These findings suggest that resistant maize lines do not respond to BA induction, whereas susceptible and moderately susceptible lines benefit significantly from its application. This provides new insight that BA can potentially induce resistance in susceptible maize plants against downy mildew.

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