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All Journal Plantropica: Journal of Agricultural Science Journal of Tropical Plant Protection AGRIVITA, Journal of Agricultural Science Jurnal HPT (Hama Penyakit Tumbuhan)
Tita Widjayanti
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Agriculture, Biological Sciences & Forestry

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Journal : Journal of Tropical Plant Protection

 1 
Population of Lamprosema indicata and Their Parasitoid in Edamame Soybean Plant Joko Siswanto; Tita Widjayanti; Sri Karindah
Journal of Tropical Plant Protection Vol 2, No 2 (2021)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2020.002.2.4

Abstract

Soybean Glycine max L. Merrill has a strategic position in food security. Soybean varieties are various, such as edamame or commonly called vegetable soybean. The important edamame pest is L. indicata. This pest has a natural enemy in the form of parasitoids that spread at several altitudes. This study aimed to investigate the L. indicata pest population and their parasitoid  in edamame soybean plantations at three different altitudes. In this study conducted at three altitudes namely Purwosari (12 masl), Sebanen (814 masl), and Karangbireuh (1295 masl). At each location consist of one plot (1 Ha) and were  made into 4 sub-plots exchanging 10 x10m. Also, the yellow pan trap was installed at  8–57 Day After Planting to collect L. indicata and parasitoid. The results showed that L. indicata was higher in Purwoasri than in other locations. This is due to environmental factors namely temperature. The parasitoid of L. indicata was found in all locations, namely Braconidae family (parasitoid of larvae). While the the paarasitoid were collected in yellow pan trap in all locations i.e. Pteromalidae, Diapriidae, Eulophidae, Mymaridae and Entomacis sp.
Effectiveness Evaluation of Insecticides Containing Spirotetramat + Abamectin Active Ingredients Against Thrips (Thrips palmi) in Tomato Plants Fitriyah, Vebriyanti; Rachmawati, Rina; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 6 No. 1 (2025)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2025.006.1.5

Abstract

The tomato plant (Lycopersicum esculentum Mill.) is one of the horticultural crops that is frequently cultivated and consumed due to its considerable nutritional value, including vitamins A and C. In the cultivation process, farmers often face problems caused by plant pests, one of which is Thrips (Thrips palmi Karny). This study aims to determine the effectiveness of insecticides containing the active ingredients spirotetramat + abamectin at several concentrations against T. palmi. Research activities were conducted in Pujon District, Malang Regency, and Junrejo District, Batu City, East Java, from April to June 2023. The research used a Randomized Complete Block Design (RCBD) with 5 treatments: spirotetramat + abamectin 1.00 ml/l; 0.75 ml/l; 0.50 ml/l; 0.25 ml/l; and a control. The results showed that the use of spirotetramat + abamectin insecticides at different concentrations affected the average T. palmi population level and yield in tomato plants. Treatment with a concentration of 1.00 ml/l was the most effective, achieving an efficacy index (EI) value of more than 70%.
Diversity of Coleopteran Insects at Horticulture Farmland in Pendem Village Batu City Hastawulan, Anastassia Wita Aryandini; Rachmawati, Rina; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 6 No. 2 (2025)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2025.006.2.4

Abstract

Coleopteran has a remarkable degree of environmental adaptation, allowing it to survive and reproduce in a variety of habitats. Research was conducted to determine the distribution of Coleopteran insects and the influence of commodities on the composition of Coleopteran insects. The research was conducted in May-August 2021 in Pendem Village, Batu City. Sampling is accomplished visually and through the placement of yellow pan traps and pitfall traps on tomatoes, large chili peppers, onions and cucumbers for 9 weeks. The study revealed 15 morphospecies belonging to the families Anthicidae, Carabidae, Chrysomelidae, Coccinellidae, Scarabaeidae, Staphylinidae, and Tenebrionidae which have roles as herbivore, predator and detritivore. In tomato plants 862 individuals were found, in large chili plants 1444 individuals were found, in onions plants 519 individuals were found and in cucumber plants, 697 individuals were found.
Fluctuation Patterns Spodoptera frugiperda and Its Natural Enemies on Maize Plants With IPM and Conventional Practice in Malang Regency Prayogo, Bagas Agung; Mudjiono, Gatot; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 3 No. 2 (2022)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2022.003.2.2

Abstract

Spodoptera frugiperda (Lepidoptera: Noctuidae) is a pest that originated in the United States and then migrated to Indonesia. This pest reportedly attacked corn in West Pasaman, West Sumatra Province, in 2019. This study aimed to determine the effect of cultivation practice on fluctuations in natural enemies and S. frugiperda. The research was conducted in Pandan Rejo Village, Pagak, Malang Regency. Data from observations of pest populations' natural enemies were then analyzed using simple quantitative analysis. The population and intensity of Spodoptera frugiperda attacks on IPM practices were always lower than those on conventional practices. During observation, there were 2 species of natural enemies, Braconidae and Scelionidae. The parasitoid population in IPM is always higher than in conventional practice. The lower parasitoid population at conventional practice failed to suppress the S. frugiperda population. Farming business analysis calculated using the R/C ratio showed that IPM practice had a value of 1.03 while conventional was only 0.55. IPM practice is feasible and more ecologically friendly than conventional practice.
Arthropods Diversity on Soybean Fields with Integrated Pest Management and Conventional Systems in Gandusari District, Blitar Regency Mahendra, Niko; Rahardjo, Bambang Tri; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 4 No. 1 (2023)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2023.004.1.3

Abstract

Various negative impacts of pesticides must be avoided by applying management principles that have as little negative impact on the environment as possible using an integrated pest management (IPM) approach. This study aimed to examine the diversity of arthropods and the feasibility of farming in IPM and conventional fields on soybeans. Arthropod sampling was carried out in September–December 2021 using a yellow pan trap, yellow sticky trap, and visual methods. The arthropod population found was analyzed using the T-test, and the level of arthropod diversity was calculated based on the diversity index (H'), species richness index (R), evenness index (E), and dominance index (C). The feasibility of farming on both fields was calculated using the R/C ratio and BEP prices. The results showed that the number of arthropods in IPM and conventional fields was significantly different. In both fields, the diversity index value was in the medium category, the species richness index value and the evenness index value were in the high category, and there was no dominance in both fields. Even though it belonged to the same category, the index value of arthropod diversity in the IPM field was higher than in the conventional field. In IPM and conventional fields, the R/C ratio values were 1.01 and 1.06, respectively, while the BEP value in IPM and conventional fields was IDR 10,601.44 and IDR 10,075.14.
Influence of Phosphate Powder Application on The Biology and Demographic Statistics of Green Ladybug (Nezara viridula L.) (Hemiptera: Pentatomidae) on Soybean Pods Septiani, Rohma Wulan; Rahardjo, Bambang Tri; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 4 No. 2 (2023)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2023.004.2.1

Abstract

Green ladybug Nezara viridula (Hemiptera: Pentatomidae) is one of the harmful pests on soybeans. One of the ways to suppress attacks is by using phosphate fertilizers. The effect of applying phosphate fertilizer could be seen using biological parameters and demographic statistics. The research was conducted at the Pest and Wirehouse Laboratory, Department of Plant Pests and Diseases, Faculty of Agriculture, Brawijaya University, from January to June 2022. The experimental design in this study used Completely Randomized Design (CRD) in the laboratory and wired house. There were four treatment doses of phosphate fertilizer consisting of 0 kg/ha (control), 25  kg/ha (low), 50 kg/ha (recommendation), and 75 kg/ha (high). Observations were made on 90 individuals of N. viridula in each treatment divided into three replications. The type of phosphate fertilizer used in this study was SP36 fertilizer. The observational variables of this study were the biology and demographic statistics of N. viridula. Observations were made daily, and the data were compiled in a live table. Calculations were carried out using demographic statistics and analysis of variance to determine differences between treatments using HSD 5%. The results showed biological and demographic statistical differences in N. viridula: personality, life cycle, and gross growth rate (GRR). These findings have significant implications for pest management in soybean cultivation, suggesting that applying phosphate fertilizers can effectively suppress the attacks of N. viridula, particularly at the recommended dose.
The Influence of Trap and Refugia Plants on Populations and Attacks of Leaf-Miner Flies Liriomyza sp. on Shallots Cultivation Setiawati, Lia; Mudjiono, Gatot; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 4 No. 1 (2023)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2023.004.1.1

Abstract

Leaf miners (Liriomyza sp.) are one of the pests affecting shallot plants. Attacks by Liriomyza sp. on shallot plants lead to tuber rot and leaves drying out, resembling burn damage. One control method is to utilize trap plants and refugia. Trap plants are specific species that attract pests, diverting them from the main crop. Refugia, on the other hand, are areas where pests can seek shelter, reducing their impact on the main crop. This study aimed to assess the impact of trap plants and refugia on the population and attacks of Liriomyza sp. in shallot crops. The research was conducted from June to September 2021 at the experimental field of the Faculty of Agriculture in Jatimulyo Village, Lowokwaru District, Malang City, East Java. Observation parameters included the population of Liriomyza sp., damage intensity, population of natural enemies, plant height, and number of leaves. The results indicated that different types of trap plants significantly influenced the population of Liriomyza sp. and damage intensity compared to the control treatment. However, different trap plant types did not significantly affect the population of natural enemies. The natural enemies identified included Vespidae, Coenosia sp., and Opius sp. Additionally, various trap plant types did not significantly impact plant height and the number of leaves.
The Effectiveness Test of Trichoderma harzianum, Mycorrhiza and Bacteria B8 on the Growth of Phytophthora nicotianae in Pineapple Plants (Ananas comosus L. Merr) at PT.Great Giant Pineapple Larasati, Candra Violita; Syamsulhadi, Mochammad; Widjayanti, Tita
Journal of Tropical Plant Protection Vol. 4 No. 2 (2023)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2023.004.2.5

Abstract

This study aims to determine the potential of biological agents to inhibit the pathogen P.  nicotianae that causes liver rot and the effect of biological agents on the growth of pineapple plants at PT. Great Giant Pineapple. The research was carried out at the Experimental Field and Research and Development Protection Laboratory of PT. Great Giant Pineapple, Terbanggi Besar, Central Lampung from September to November 2022. The research was carried out in several stages, namely the preparation stage and the implementation stage. The preparation stage includes land preparation, breeding and application of T. harzianum, preparation of liquid culture of T. harzianum and B8 bacteria, dipping crowns, and selection of crowns and tagging. While the implementation phase includes planting, application of T. harzianum, mycorrhiza, and B8 bacteria, observation of disease occurrence level, antagonist test, observation of new leaf growth, and plant observation. The data obtained were analyzed using the T-test, which compared the control plot with the treatment plot (T. harzianum, mycorrhiza, and B8 bacteria). The results showed that the application of the biological agent T. harzianum had a significant effect on suppressing the pathogen P. nicotianae that causes heart rot in pineapple plants in vitro. In addition, the application of T. harzianum, mycorrhiza, and B8 bacteria significantly affected the growth of the number of tillers, d-Leaf height, and d-Leaf index.
Co-Authors Akhmad Rizali Bambang Tri Rahardjo Eva Febriyanti Fitriyah, Vebriyanti Gatot Mudjiono Hastawulan, Anastassia Wita Aryandini Joko Siswanto Julia Putri Pramudita Larasati, Candra Violita Mahendra, Niko Prayogo, Bagas Agung Restikasari, Viera Annisa Rina Rachmawati Rosandy, Devia Fitri Septiani, Rohma Wulan Setiawati, Lia Sri Karindah Syamsulhadi, Mochammad Taufiqurrahman, Achmad Fitriadi Yolla Frinsiska Rama