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JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION)
Published by Universitas Andalas
ISSN : 25800604     EISSN : 26213141     DOI : -
Core Subject : Agriculture, Social,
Arjuna Subject : -
Articles 6 Documents
Search results for , issue "Vol 5 No 2 (2021): Desember 2021" : 6 Documents clear
Infeksi Ganda Pepper Yellow Leaf Curl Virus dan Chilli Veinal Mottle Virus dalam Menimbulkan Penyakit Daun Kuning Keriting Cabai Jumsu Trisno; Jamsari Jamsari; Sri Hendrastuti Hidayat
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.77-88.2021

Abstract

Yellow leaf curl disease is the primary disease in chili plants with up to 100% losses. Detection from the field showed a mixed infection between Geminivirus or Pepper Yellow Leaf Curl Virus (PYLCV) and several viruses, including Chilli Veinal Mottle Virus (ChiVMV) and Cucumber mosaic Virus (CMV). Therefore, this study aimed to determine the role of PYLCV and ChiVMV dual infection in influencing the development of chili yellow leaf curl disease. This study used a completely randomized design (CRD) with six treatments and ten replications. The treatments used were multiple Geminiviruses and ChiVMV infections simultaneously, before ChiVMV co-infection, after Geminivirus infection, single infection and whithout infection viruses. The results showed that the presence of ChiVMV infection before, after, and concurrently with Geminiviruses infection could increase the yellow leaf curl disease intensity and reduce plant height and wet weight growth. The mean scale value of ChiVMV infection before, after, and concurrently with Geminiviruses infection were 3.38, 3.90 and 3.58 compared to single Geminiviruses infection (scale of 3.20) and single ChiVMV (scale of 1.33). The interaction analysis of ChiVMV and geminiviruses infections based on the percentage reduction in plant growth height and wet weight showed additive interaction. ChiVMV co-infection further exacerbated the incidence of yellow leaf curl diseases in chilies.
Effect of Induced Plant Expression on Ants and Extrafloral Nectaries Number in Cotton and Castor Nalini Thiyagarajan; Revathi Mani
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.89-97.2021

Abstract

Plant response to the attack of herbivores is a usual phenomenon, but the number of extrafloral nectaries (EFNs) in response to herbivore attack is least studied and recorded. The current study was undertaken to document the response of cotton (Gossypium hirsu-tum Linnaeus) and castor (Ricinus communis Linnaeus) to herbivore and artificial induction. This field research was carried out experimentally on cotton and castor in two study models. The first study was the presence of ants on plants induced by herbivore (with herbivore, without herbivore) and the number of EFNs produced by each plant. The second study was the presence of ants on artificially induced plants (damaged leaves, undamaged leaves) and the number of EFNs produced by each plant. The results revealed that EFNs numbers in cotton and castor were increased by herbivore and artificial inductions, which also induced the number of ant recruitment events in cotton and castor. Artificial induction techniques can be utilized in pest management programs to attract and conserve plant guards, viz., biocontrol agents, including ants in the field. EFN is a cheap resource in quickly and effectively maintaining consistent population levels of biocontrol agents within the crops, even during pest-free times.
Efikasi Serbuk Daun dan Biji Nimba dalam Kemasan Teh untuk Mengendalikan Sitophilus oryzae pada Beras Nurul Aflah; Hafidhah Afriana; Husni Husni; Tjut Chamzurni; J Jauharlina
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.98-106.2021

Abstract

Neem (Azadirachta indica Juss) powder is often used as a botanical insecticide which is applied directly to stored rice to control the rice beetle (Sitophilus oryzae), however this method may cause contamination on the stored rice. This study aimed to determine the effectiveness of neem leaf and seed powder in teabag packaging in controlling S. oryzae. The study used a completely randomized design with a factorial pattern consisting of 2 treatment factors. The first factor was the type of neem powder (without powder, leaf powder, and seed powder), and the second factor was the application technique (direct sow and in teabag packaging). The results showed that the type of neem powder and its application technique on rice interacted significantly in causing mortality of S. oryzae at 2 - 3 days after treatment (DAT) and was very significant at observations of 4-7 DAT. Applying leaf and seed powder in teabag packaging can provide higher yields than direct sowing. At 7 DAT, the highest mortality of S. oryzae occurred in the treatment of neem seed powder with direct sow application technique (57.50%), the mortality was lower in tea packaging (33.33%). The application of neem powder in teabag packaging caused a higher number of the adult of the first offspring of S. oryzae and the damage to rice. The application of leaf and seed powder of neem in teabag packaging does not cause contamination of rice, so it is safer for consumers.
Potensi Tanaman Refugia dalam Meningkatkan Keanekaragaman Serangga pada Pertanaman Padi Sawah di Padang Pariaman, Sumatera Barat Widya Nawir; Novri Nelly; Yaherwandi Yaherwandi
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.60-68.2021

Abstract

Some flowering plants like common zinnia (Zinnia elegans (Jacq) Kuntze), marigold (Tagetes erecta Linnaeus), and cockscomb flowers (Celosia sp.) have been used as refugia and conservation plants for predators and parasitoids but are still not yet optimal. Planting refugia plants can affect insect diversity and evenness index, affecting the stability and balance of the agroecosystem. The study aimed to determine the effect of common zinnia, cockscomb flowers, and marigold as refugia on insects’ diversity and evenness index and their potential as a medium for conservation of predators and parasitoids. The study was conducted in organic rice fields in Batang Anai Sub-district, Padang Pariaman District, West Sumatra, from May to July 2020. The Insect was collected from plots covering an area of ??48 m2 and identified in the Bioecology laboratory, Faculty of Agriculture, Universitas Andalas. Planting common zinnia, marigolds, and cockscomb flowers increased the index of diversity and evenness of insects around rice fields. The index of diversity and evenness of insects on cockscomb flowers (H = 2.90) was higher than that of common zinnia (H = 2.61) and marigold (H = 2.63). Cockscomb flowers have more potential as a medium for conserving predators and parasitoids.
Akurasi dan Prediksi Kejadian Hopperburn Wereng Batang Coklat (Nilaparvata Lugens Stal) menggunakan Citra Sentinel-2 Rahmad Gunawan; Reflinaldon Reflinaldon; Yaherwandi Yaherwandi
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.107-117.2021

Abstract

Forecasting of brown planthopper attack or BPH (Nilaparvata lugens Stal) using artificial intelligence and vegetation index of Sentinel-2 Satellite Imagery improves forecasting the incidence of hopperburn. This study aimed to determine the accuracy and correlation of the random forest classification of Sentinel-2 imagery to the incidence of hopperburn reported by Plant Pest Organisms Observer (PPOO) and determine the best method for predicting it. The study was done through observation and secondary data processing about the age of the plant, the incidence of hopperburn by BPH, interviews with farmers, and PPOO. The results showed that the hopperburn NDVI index ranged from 0.23 - 3.8. The random forest classification accuracy was high (Kappa Index = 0.82). The relationship between the hopperburn area from the PPOO report and the predicted area from Sentinel-2 images classified as (R2 = 0.53, R = 0.728) with the equation Y = -1.5 + 0.82 X. The correlation can be improved using spatial regression Geographically Weighted Regression (GWR4) with the best gaussian distance of 1.76 km (R2 = 0.6, R = 0.77). The best prediction for the NDVI stage of hopperburn attack time series with random forest (RMSE = 0.12819) was better than the prediction of the hopperburn attack time series with the exponential smoothing method from the PPOO report (RMSE 3.302184).
Kemampuan Trichoderma viride Isolat PP2 dalam Mengendalikan Colletotrichum gloeosporioides pada Tanaman Cabai (Capsicum annuum Linnaeus) secara In-Planta Gefi Zulmiati Lannur; Yenni Liswarni; Martinius Martinius
JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Vol 5 No 2 (2021): Desember 2021
Publisher : Jurusan Hama dan Penyakit Tumbuhan Faperta Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.5.2.69-76.2021

Abstract

The culture filtrate is a secondary metabolite produced from the multiplication of fungi in a liquid medium during the incubation period, separated between the fungal cell and their supernatants. Trichoderma viride culture filtrate testing has been widely carried out and used as a biocontrol agent. This study aimed to determine the ability of Trichoderma viride PP2 culture filtrate concentration in suppressing anthracnose disease caused by C. gloeosporioides on the red chili pepper. The study was conducted with a randomized block design (RBD) consisting of 5 treatments and five replications. The treatments were the concentration of T. viride PP2 culture filtrate, i.e., 0% (control), 25%, 50%, 75% and 100%. Parameters observed were incubation period, percentage of infected, and infected intensity. The results showed that the application of filtrate of T. viride isolate PP2 with different concentrations has not been able to suppress the development of anthracnose disease caused by C. gloeosporioides in-planta. It is necessary to conduct further research on the effect of temperature and time application on suppressing the filtrate of T. viride isolate PP2.

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