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All Journal Kultivasi Jurnal Entomologi Indonesia Agro Bali: Agricultural Journal
Sembiring, Perdinanta
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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A comparison of synthetic fungicide and Trichoderma spp. applications against clubroot disease on cabbage Tarigan, Ra Siska; Hutabarat, Rina Christina; Karo, Bina br; Sembiring, Perdinanta; Napitupulu, Delima; Supardi, Supardi; Wicaksono, Rudi Cahyo; Jamaluddin, Jamaluddin; Setiawati, Wiwin; Hasyim, Ahsol
Kultivasi Vol 23, No 1 (2024): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v23i1.50706

Abstract

Clubroot is one of the important diseases affecting members of the Cruciferae family.  This disease is caused by soil-borne pathogen, called Plasmodiophora brassicae. The pathogen produces motile spores called zoospores. This pathogen results in a drop of cruciferous plant productivity. The objectives of this research were to identify specific Trichoderma species in three districts in Sumatra Utara and to evaluate the potency of T. harzianum (both local species from Berastagi and species developed by Indonesian Vegetable Research Institute (IVEGRI)) to control the disease and then comparing them with the application of synthetic fungicide. The research was conducted in a greenhouse of Research Installation and Application of Agricultural Technology (IP2TP), Berastagi, North Sumatera from April‒September 2018, using Completely Randomized Design (CRD) with eight treatments: C1 (control-without Trichoderma), C2 (T. harzianum IVEGRI obtained from corn substrate 2 g/polybag), C3 (T. harzianum IVEGRI obtained from rice substrate 2 g/polybag), C4 (T. harzianum IVEGRI obtained from corn substrate 4 g/polybag, C5 (T. harzianum IVEGRI obtained from rice substrate 4 g/polybag), C6 (local T. harzianum obtained from corn substrate 2 g/polybag), C7 (local T. harzianum obtained from corn substrate 4 g/polybag) and C8 (synthetic fungicide Nebijin). Each treatment contained 10 polybags of plants. These treatments were replicated four times. The results exhibited there were 3 Trichoderma species found in Berastagi: T. harzianum, T. viride and T. koningii. Also, 4 g of local T. harzianum (corn substrate) has better performance (0% disease incidence and 0% disease severity) compared to other treatments.
Silica Application in Improving Growth and Production of Onion (Allium cepa L.) Under Drought Stress Sembiring, Perdinanta; Ginting, Jonathan; Hanum, Hamidah; Hutabarat, Rina C.
Agro Bali : Agricultural Journal Vol 8, No 2 (2025)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v8i2.2168

Abstract

Climate change contributes to greater drought severity, leading to the decline of crop production. This study aims to evaluate the role of silica in onion production under water-deficient conditions.  The research was conducted at the Technical Implementation Unit Benih Induk Palawija in Tanjung Selamat, Deli Serdang, North Sumatra Province. Randomized Block Design with factorial arrangement was employed in this study, comprising 4 different doses of silica (0, 0.48, 0.96 and 1.44 g per plant) at 3 different levels of drought (40, 60 and 80% water holding capacity (WHC)).  The results showed that silica did not give significant results on vegetative growth and its yield, except for its root dry weight and plant wet weight. The best plant development was demonstrated by onions exposed to 80% WHC, followed by plants with 60% and 40% WHC.  The application of silica 0.48 g on onions treated with 60% WHC has a greater increase in the production of onion bulbs. 
Keanekaragaman dan aktivitas serangga pengunjung pada bunga wortel Tarigan, Rasiska; Barus, Susilawati; Hutabarat, Rina C.; Sembiring, Perdinanta; Parhusip, Dorkas; Udiarto, Bagus Kukuh; Aryani, Dewi Sartika
Jurnal Entomologi Indonesia Vol 19 No 3 (2022): November
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.19.3.214

Abstract

Pollinating insects act as agents for transferring pollen to the pistil that leads to the increase of quality seed production. Since carrot is propagation through seed, insect pollination are important in the reproduction of the crop. The purpose of this study was to observe the diversity and activity of pollinating insects on carrot flowers in the Experimental Garden of the Agricultural Technology Research and Assessment Installation (IP2TP) Berastagi. Scan sampling method was applied to record the pollinator diversity, while the foraging behaviour of the insects was observed using focal sampling. The number of insects were recorded, collected and preserved in ethanol 70%. Insect identification guideline book was used to identify the insects by comparing their morphology and physiology.  The results showed that there were 8 insect species visiting the carrot flowers: Apis mellifera Linnaeus, Polyrachis sp., Coccinella sp., Rhagonycha sp., Muscidae sp., Chrysomya sp., Nephrotoma sp. and Tabanus sp. A. mellifera was found to have the highest intensity visiting the carrot flowers (21.6 ± 10.06)% while the lowest was demonstrated by Polyrachis sp. (12.6 ± 4.12)%. Also, A. mellifera was recorded to be the most active insect (11.84 ± 1.46 seconds/flower) with the number of flowers visited was 5,06 ± 1,46 flowers/minute. Polyrachis sp. has been revealed to have the longest stay on the flowers visited (49.24 ± 3.89 seconds/flower) with the number of flowers visited 1.21 ± 3.90 flowers/minute. The diversity of pollinating insect was found to be in intermediate level (H’ = 1.89).
Co-Authors Ahsol Hasyim Aryani, Dewi Sartika Bagus Kukuh Udiarto Barus, Susilawati Delima Napitupulu Hamidah Hanum Hutabarat, Rina C. Jamaluddin Jamaluddin Jonathan Ginting Karo, Bina br Parhusip, Dorkas Rasiska Tarigan Rina Christina Hutabarat, Rina Christina Supardi Supardi Tarigan, Ra Siska wicaksono, rudi cahyo Wiwin Setiawati