Journal of Tropical Horticulture

Journal Information
EISSN : 26228432
Total articles ≅ 37

Latest articles in this journal

Ira Handayani, Laila Nazirah, Rd. Selvy Handayani
Journal of Tropical Horticulture, Volume 3, pp 38-42; doi:10.33089/jthort.v3i1.43

Acehnese pomelo is considered as a potential fruit to be developed for its economic and nutritional values. However, there is a main problem in developing this fruit. Pomelo sometimes is grown from seeds, but nowadays the fruits are often found to be having lesser seeds or even seedless. Besides, it is quite challenging to grow this local pomelo not only due to the scarce of the seeds, but it also cannot be conventionally germinated. Therefore, we need to develop this fruit through tissue culture. The purpose of this study was to investigate the effect of growth regulators on germination of pomelo seeds in vitro and its organ formation from in vitro root explants seed-originated of pomelo. The study was conducted at Plant Tissue Culture Laboratory, Faculty of Agriculture, Malikussaleh University. In October 2018 to April 2019. The research was divided into two separate experiments: 1) in vitro germination of pomelo seeds and 2) in vitro organ formation from root explants from of pomelo seeds. The first experiment using Complete Randomized Design (CRD) with 10 replications. The only factor observed was the use of BAP (0 and 2 mg/l). The second experiment was the examination of plant organ formation from root explants of pomelo seeds. This experiment had 2 factors observed. The first factor was different concentrations of BAP (0, 1, and 2 mg/l). The second factor was the different concentration of IBA (0, 1.25, and 2.5 mg/l). The results indicated that the application of BAP influenced the germination of pomelo seeds. The application of 2 mg/l BAP attributed to slower growth of shoots and roots, but it demonstrated better number of shoots, roots and leaves compared to application of 0 mg/l BAP. Pamelo root explants can form adventitious shoots on media eventhough without growth regulator (BAP 0 mg/l + IBA 0 mg/l), but optimization still needs to be done in order to obtain the best concentration to initiate shoot formation.
Hendrival Hendrival, Dewi Sartika Aryani, Nanda Saputri
Journal of Tropical Horticulture, Volume 3, pp 6-11; doi:10.33089/jthort.v3i1.38

Accurate information on the species and host spectrum is an important aspect of fruit flies management. The study was conducted in August to November 2018 to evaluate the host range and species diversity of fruit flies in Lembah Seulawah District, Aceh Besar Regency, Aceh Province, Indonesia. Fruit flies were collected from 3 villages in Kemukiman Saree: Suka Damai, Suka Mulia, and Saree Aceh. The insects were collected using the trapping method. The modified Lynfield trap baited with methyl eugenol (ME) was used in the research. This modified Lynfield trap was applied using used mineral bottles. Shannon-Wiener diversity index, evenness index, and dominance were applied to determine the diversity of fruit flies. The results revealed that there were six species of fruit flies that acted as pests in 21 species of host plants belonged to 12 families. They were Bactrocera carambolae, Bactrocera latifrons, Bactrocera limbifera, Bactrocera papayae, Bactrocera umbrosa, and Bactrocera verbascifoliae. B. carambolae was found to be dominant insect pest even though the results indicated that diversity and evenness index of fruit flies species in this district were low.
Nini Marta, Kuswandi Kuswandi, Mega Andini, Sunyoto Sunyoto, Yulia Irawati, Nofiarli Nofiarli, Fitriana Nasution
Journal of Tropical Horticulture, Volume 3, pp 19-22; doi:10.33089/jthort.v3i1.40

Shallot is an important spice and seasoning in Indonesia. It is consumed almost daily in many dishes. The objective of this experiment was to study the effect of the medium and the variety on the yield of shallots grown in a polybag. The experiments were arranged in a two-factorial randomized complete block design with three replications. The factors were medium (1 soil: 1 paddy husk ash and 1 soil: 1 compost) and variety (Agrihorti 1 and Mentes). Data were statistically analyzed by Analysis of Variance (ANOVA), and the means were compared using Honestly Significant Difference (HSD) at P < 0.05. There was no interaction between medium and variety. Overall, all treatments did not significantly affect yield. Varieties were significant differences on bulb diameter; however, they were not significant differences on bulb height, fresh bulb weight per polybag, and bulb number per polybag. Those media are considered as precise media due to they contain organic materials.
Mira Agustina, Maisura Maisura, Rd. Selvy Handayani
Journal of Tropical Horticulture, Volume 3, pp 1-5; doi:10.33089/jthort.v3i1.37

The efforts of the rooting of regenerants resulting from gamma-ray irradiation require plant tissue culture, which known as micrografting. This technique can help irradiated regenerants to develop a well root system, by combining non-rooting shoots with rooted in vitro cultured shoots of plant rootstock. The purpose of this study was to examine the effect of seed explants cutting and the application of different BAP concentrations for the successful micro-grafting of mangosteen in vitro. This experiment employed Complete Randomized Design (CRD) Factorial with two factors and ten replications. The first factor was the cutting treatments of mangosteen seeds explants for rootstock shoots, consisting of 2 types of seeds: uncut and cut seeds. The second factor was BAP concentrations: BAP 0 mg/l and BAP 2 mg/l. The results showed that the division of the seeds had an influence on the results of micro-grafting mangosteen in vitro. Micrografted mangosteen, which rootstock applied from undivided seeds, possessed faster growth, longer shoots, and produce more leaves compared to rootstock shoots from the divided seeds. BAP concentrations also contributed to the results. The application of BAP 2 mg/ demonstrated better effect on all variables observed. There were no interactions between seed divisions and BAP concentrations in all observed variables.
Bina Beru Karo, Agustina E Marpaung
Journal of Tropical Horticulture, Volume 3, pp 23-28; doi:10.33089/jthort.v3i1.41

Leek is one type of leaf vegetable that is commonly used for cooking vegetables or seasonings. Currently, it founded some problem in leek cultivation, including the production is low because the fertilization is not appropriate. The type and dosage of fertilizer can contribute to increasing production. This research aims to determine the dosage of potassium, and fish fertilizer is right for increased leek production. The research was conducted from January - March 2015 in the Berastagi experimental farm, with altitude ± 1340 meters above sea level; the soil type was andisol. Experiments using a randomized block design (RBD) factorial with three replications. The first factor is the dosage of potassium fertilizer K0 (0 kg/ha), K1 (100 kg/ha), K2 (200 kg/ha), and K3 (300 kg/ha). The second factor is dosage fish fertilizer I0 (0 kg/ha), I1 (500 kg/ha), I2 (1000 kg/ha), and I3 (1500 kg/ha). The leek variety was used is local variety. The results showed that there is an interaction between the potash and fish fertilizers on leek plant height. Application potash fertilizer (K2O) dosage of 200 kg/ha and fish fertilizer dosage of 1000 kg/ha can increase the leek plant height 56,98 cm. Application potash fertilizer (K2O) dosage of 200 kg/ha can increase the stem diameter, length of stems, length of leaves, and fresh weight per plant. Application fish fertilizer dosage of 1000 kg/ha can increase the stem diameter, leaves length, fresh and dry weight per plant
Lutfi Izhar, Desi Hernita, Salwati Salwati, Suharyon Suharyon
Journal of Tropical Horticulture, Volume 3, pp 29-37; doi:10.33089/jthort.v3i1.42

The agricultural problems currently cover-up with limited land, water, infrastructure, production facilities and infrastructure, access to finance and institutions. These problems cause the quantity and quality of agricultural products to be stumpy. One effort that can eliminate these problems is through the assessment of a comprehensive, integrated agricultural development program. The objectives of this study was: (1) to determine the amount of citrus farming income, and (2) to analyze the economic and institutional feasibility of citrus farming in Bunga Tanjung Village, Betara District, west Tanjung Jabung region. This study was conducted in Bunga Tanjung Village, Betara District, West Tanjung Jabung, Jambi, from 2017-2019. Approach to the activities through coordination and program integration from the Regional Government. Efforts to increase the production of citrus plants are currently experiencing challenges due to doubtful economic viability. Data collected in this study includes primary data in the form of information from farmers and secondary data such as a profile of study area, demographics, social and economic potential data. Primary data was collected by interviewed farmers using a questionnaire. The sample was randomly determined citrus farmer population with 40 respondents. Data analysis techniques include tabulation analysis used to recognize the farmer's economic conditions and feasibility. The results of this study indicated that citrus productivity had increased continuously by applying environmentally friendly cultivation technology i.g. Fertilizing, controlling pests and diseases, removing water shoots, pruning shapes, and pruning unproductive branches. Citrus production of non-demonstration plots was 3.145 kg, and demonstration was 4.960 kg, there was an increase of 1.815 kg or 36.59% with an average of R/C ratio for demonstration plots was 2.51 while non-demonstration citrus of 2.20. This means that the cultivation of the citrus plant is feasible to continue.
Odit Ferry Kurniadinata, Song Wenpei, Rusdiansyah Rusdiansyah
Journal of Tropical Horticulture, Volume 3, pp 12-18; doi:10.33089/jthort.v3i1.39

Kalimantan Island is rich in genetic resources and species diversity of Durio spp. plant. The large number of Durio species that grow in Kalimantan illustrates that this area is the most important distribution center for durian relatives. The best-known edible durians are Durian (Durio zibethinus). However, Kalimantan also has various types of Durian that are not yet widely known and have superior potential. One of the unique and exotic plants is the red flesh Durian in East Kalimantan, Indonesia. The fruit of this plant is unique because it has red flesh. At present, there is no morphological identification of this East Kalimantan Durio graveolens plant. The study aimed to identify the morphological character of Batuah D. graveolens from East Kalimantan, Indonesia. This research was carried out by collecting data and information about the morphological characteristics of the plant and fruits. The results of the study successfully identified Batuah D. graveolens from East Kalimantan as a plant diverts from another Durio spp. plant known like D. zibethinus and D. kutejensis especially for red flesh character.
Editor Jthort
Journal of Tropical Horticulture, Volume 3; doi:10.33089/jthort.v3i1.46

Editor Jthort
Journal of Tropical Horticulture, Volume 3; doi:10.33089/jthort.v3i1.47

Cover, Journal Description, Editorial Team, Table of Content, Indexing
Siti Hafsah, Firdaus Firdaus
Journal of Tropical Horticulture, Volume 3, pp 43-48; doi:10.33089/jthort.v3i1.44

This study was aimed at obtaining information related to genetic parametric against anthracnose diseases caused by Colletotrichum capsici, which attacked several pepper genotypes. The research was conducted in a net house at the Faculty of Agriculture, Universitas Syiah Kuala, Banda Aceh, from July to December 2017, and it was divided into two experiments: 1) planting the peppers which carried out in a net house. This experiment employed Randomized Block Design (RBD) Non-Factorial and 2) anthracnose resistance assay. This assay applied using Completely Randomized Design (CRD) Non-Factorial with the only factor observed: 11 pepper genotypes (IPBC15, IPBC15D2, IPBC15D3, IPBC15D4, Udeng, Lamando Lapaben, Super Amando, Lanyoe, Lado F1, Kastilo F1, and PM999 F1), with three replications. The results showed that the genotypes IPBC15, IPBC15D2, IPBC15D4, Udeng, Lamando Lapaben, Lado F1 exhibited moderate resistance, while genotypes IPBC15D3, Super Amando, Lanyoe, Kastilo F1 and PM999 F1 were susceptible to the disease. The wide variety of genetic and high heritability was found in stem length, flowering age, length of fruit stalk, fruit length, fruit diameter, and skin thickness, while narrow and moderate genetic variability was found in stem diameter and harvest age. The coefficient of genetic diversity in stem length, length of fruit stalk, and fruit length was found to be moderate and expressed low diversity in stem diameter, flowering age, and skin thickness. Stem diameter and skin thickness also showed a negative correlation to disease severity.
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