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All Journal International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) PERTANIAN TROPIK
Asmanizar
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Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Economics, Econometrics & Finance Education

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Usage of Jatropha curcas as Botanical Insecticide in Controlling Insect Pest Asmanizar
Jurnal Online Pertanian Tropik Vol. 10 No. 1 (2023): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jopt.v10i1.14032

Abstract

Insect pests can cause damage to plants and cause losses. Insect pests on plants need to be controlled both preventively and curatively. Integrated control is an integration of several control methods that can be implemented in a compatible and comprehensive. Insect pest control using bio-active plant materials as an alternative to synthetic chemicals. Plants produce secondary metabolite compounds that can affect insects, including Jatropha curcas (Euphorbiaceae). Studies on several insect pests both in the laboratory and in the field against insect pests that attack the field and agricultural product storage warehouses have been carried out to determine their effectiveness. Jatropha curcas plants/parts of plant were applied after extraction treatment with various solvents (water, ethanol, methanol, acetone, petroleum ether, n-hexane and chloroform) or direct use. The results showed that J. curcas exhibited control effects against several types of insect pests from various insect pest. Laboratory study showed the insecticidal effect of J. curcas against Helicoverpa armigera, Spodoptera frugiperda, Plutella xylostella, Earias insulata, Spilarctia oblicua, Tuta absulata, Nezara viridula, Corcyra cephalonica, Maruca vitrata. Field study showed population reduction of Putella xylostella and Aphis craccivora. Whilst, on stored product study showed mortality of insect pest (Sitophilus zeamais, Rhyzopertha dominica, Callosobruchus chinensis and C. maculatus) and reduction of weight loss of stored products. Jatropha curcas has the potential as a pest insect control to be integrated into the IPM component. Keywords: Jatropha curcas, Botanical insecticide, Insect pest
MICROBABITAT MANAGEMENT WITH VARIOUS REFUGIA PLANTS IN WHITEFLIES (Bemisia tabaci Gennadius) CONTROL ON SEVERAL VARIETIES OF RED CHILI (Capsicum annum L.) Yunita; Asmanizar; Nurhayati
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 5 No. 3 (2025): June
Publisher : CV. Radja Publika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijebas.v5i3.3389

Abstract

This research has been conducted in Simalingkar B, Medan Tuntungan Sub-district, Medan, North Sumatra with flat topography. This research started from May to August 2025. This research was supervised by Prof. Dr. Ir. Asmanizar, MP. As the chief supervisor and Prof. Dr. Ir. Nurhayati, MP. as a supervising member. This research is to determine the effect of flowers of tagetes erecta and zinnia sp as refugia plants on the presence of natural enemies of chili plants in controlling whitefly pests and tough varieties, sios tavi and local to whitefly pest attacks. This study used the Separate Plots Design (RPT) research method with two factors, namely refugia and varieties. The first factor consists of 3 levels, namely: R0 = control, R1 = tagetes erecta, R2 = zinnia sp. The second factor of varieties consists of 3 levels, namely: V1 = tough, V2 = sios tavi, R3 = local. The parameters observed were the intensity of Bemisia tabaci attack, natural enemies and production per plot. The results showed that refugia had a significant effect on production per plot, the variety treatment had no significant effect on the intensity of Bemisia tabaci attack and production per plot. The interaction of varieties and refugia had no significant effect on all observations.
STUDY OF THE EFFECT OF CULTIVATION PATTERNS AND COFFEE FRUITS BORING PEST ATTACKS (CBF) ON THE PHYSICAL QUALITY AND EXPORT FEASIBILITY OF ARABICA COFFEE (Coffea arabica L.) IN NORTH TAPANULI DISTRICT Flora Erika Simbolon; Nurhayati; Asmanizar
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 5 No. 3 (2025): June
Publisher : CV. Radja Publika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijebas.v5i3.3481

Abstract

Arabica coffee is one of Indonesia's leading export commodities that is highly dependent on the physical quality of the beans and the accuracy of cultivation practices. This study aims to examine the effect of cultivation patterns and Coffee Berry Borer (PBKo) attacks on the physical quality and export feasibility of Arabica coffee in North Tapanuli Regency. The method used is a descriptive quantitative approach with field surveys, direct observation, and laboratory tests on coffee beans from 91 farmers assisted by PT Sumatera Specialty Coffee (SSC). Data were analyzed using descriptive statistics, multiple linear regression, and Pearson correlation. The results showed that good cultivation patterns significantly improved the physical quality of coffee, while PBKo attacks had a negative impact on export feasibility. It was found that selective harvesting techniques and integrated pest control significantly reduced the number of defective beans and increased the uniformity of bean size and color. These findings confirm that the integration of high-standard cultivation practices and effective pest management is needed to improve the competitiveness of Arabica coffee from North Tapanuli in the global market.
STUDY OF REFUGIA AND VARIETIES TO REDUCE THE INTENSITY OF SPODOPTERA FRUGIPERDA AND INCREASE PREDATORS OF SWEET CORN PESTS Namsen Sartonedi S Girsang; Asmanizar; Noverina Chaniago
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 4 No. 12 (2025)
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v4i12.1159

Abstract

The research was conducted at the Experimental Field of the Faculty of Agriculture, University of Islam Sumatera Utara, Jln. Karya Wisata, Gedung Johor, Medan Johor District, Medan City, North Sumatra Province, at an altitude of approximately 25 metres above sea level, with flat topography. This research was conducted from January to March 2025. S. frugiferda is an important pest on corn plants that can cause losses with an attack intensity of up to 80%. The purpose of this research was to determine the effect of refugia plants and corn varieties on S. frugiferda attacks and the number of pest predators. This study used a split-plot design with two treatment factors, namely refugia plants Turnera subulata (B1), Tagetes erecta (B2), No Refugia (B0), and treatments of Pertiwi variety (V1) and Advanta Madu 59 variety (V2). The results showed that the Turnera subulata refugia plant and the Advanta Madu 59 variety produced lower S. frugiferda pest attacks and higher numbers of pest predators, although this was not statistically significant.
Co-Authors Flora Erika Simbolon Namsen Sartonedi S Girsang Noverina Chaniago Nurhayati YUNITA