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All Journal Journal of Tropical Horticulture Jurnal Entomologi Indonesia Agro Bali: Agricultural Journal
Hutabarat, Rina C.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Farmers’ And Retailers’ Knowledge Level Associated with Pesticide Distribution and Application in Horticultural Production Centers in Karo Regency, North Sumatera Hermanto, Catur; Tarigan, Rasiska; Marpaung, Agustina E.; Hutabarat, Rina C.
Journal of Tropical Horticulture Vol 2, No 2 (2019): October 2019
Publisher : Yayasan Pertanian Tropika Indonesia (YPTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1642.838 KB) | DOI: 10.33089/jthort.v2i2.27

Abstract

The description of the agriculture success is inseparable from the level of knowledge of retailers and farmers on the effective use of pesticides in the field. This study aimed at evaluating the relationship between the level of knowledge of retailers and farmers on the distribution and use of pesticides in vegetable production centers in Karo Regency. The research was  Berastagi Experimental Farm from August to September 2016. The research method used in the survey was a cross-sectional study approach. The selection of districts was done purposively based on the highest number of retailers, the largest horticultural planting area, and the number of vegetable farmers per district. The number of research samples was 10 respondents per district. To analyze the relationship between variables, we used Spearman's range correction coefficient calculation and validity test using SPSS correlation 17. The results exhibited that the level of knowledge of retailers and farmers in Karo regency is low about the functions, codes, and formulations of all pesticides that have been distributed. The level of knowledge of vegetable farmers on the use of pesticides in Karo district is low, seen from the high level of use, increasing concentration of pesticides and high frequency of spraying, as well as mixing fungicides and insecticides 2 types of pesticides with different codes and active ingredients. The relationship of farmers' knowledge with their age, education and the length of farming experience significantly influenced the perception and attitude of using pesticides to control pest attacks in their lands of cultivation.
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 Aryani, Dewi Sartika Bagus Kukuh Udiarto Barus, Susilawati Catur Hermanto Hamidah Hanum Jonathan Ginting Marpaung, Agustina E. Parhusip, Dorkas Rasiska Tarigan Sembiring, Perdinanta