bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGGUNAAN PROTOZOA SARCOCYSTIS SINGAPORENSIS (APICOMPLEXA: SARCOCYSTIDAE) UNTUK PENGENDALIAN TIKUS SAWAH RATTUS ARGENTIVENTER
Authors: Tobing Maryani Cyccu , Siregar Ameilia Zuliyanti , Lisnawita Lisnawita , Meirani Meirani 
Published: January 2021

The use of protozoan Sarcocystis singaporensis (Apicomplexa: Sarcocystidae) for control rice field rat Rattus argentiventer. Rats are still a number-one-pest in field rice of various areas in Indonesia. Biological control using microparasite Sarcocystis singaporensis (Apicomplexa: Sarcocystidae) is a highly host-specific protozoan for controlling the rats. The objective of this research was to study the use of protozoa parasite S. singaporensis against rodent pest Rattus argentiventer. The design of experiment was Factorial Randomized Complete Design with ten treatments and four replications. The first factor was sporocyt doses of S. singaporensis (control; 1 x 105; 2 x 105; 3 x 105; 4 x 105), while the second factor was rats sexual category (male and female). The results showed that dose of sporocysts S. singaporensis was significantly different but rats’ sexual category has no effect on the treatments. The highest mortalities was on dose 4 x 105 (100%) at 12.08 days, food consumption decreased two to four days before rats died, weight of rats decreased because of the infection of S. singaporensis.
PENGARUH KELEMBAPAN RELATIF DAN SUHU TERHADAP AKTIVITAS GLUKOAMILASE ASPERGILLUS FLAVUS PADA PENYAKIT SIMPANAN GAPLEK
Authors: Oramahi H. A. , Sumardiyono Christanti 
Published: January 2021

The effect of relative humidity and temperatur to glucoamylase activity of Aspergillus flavus on storage disease of dried cassava. Aspergillus flavus is the most important species because of its toxigenic caracteristic on agricultural product. Among several Aspergillus species growing on dried cassava. This study was conducted to show the role of glucoamylase produced by Aspergillus flavus fowards the storage disease of dried cassava. The effect of RH and storage room temperature to glucoamylase activity was evaluated for 4 months using Randomized Completely Block Design (Factorial). Variables observed were glucoamylase activity and starch content of dried cassava. Glucoamylase activity could be used as an early indicator of the infestation of dried cassava by Aspergillus while the change of dried cassava color had not been visible. Starch content of dried cassava decreased during the storage. Due to the glucoamylase activity of A. flavus which degrading starch into glucose. The interaction effect of RH and storage room temperature to glucoamylase activity of A. flavus was significant.
SEDIAAN BIJI BARRINGTONIA ASIATICA: AKTIVITAS PADA HAMA KUBIS CROCIDOLOMIA PAVONANA DI LABORATORIUM DAN KEEFEKTIFAN DI LAPANGAN
Authors: Syahputra Edy 
Published: January 2021

Preparation of Barringtonia asiatica: insecticidal activity against Crocidolomia pavonana on laboratory and effectiveness on field. The objectives of this study were to evaluate the insecticidal and anti-oviposition activity of ethanol seed extract of Barringtonia asiatica against Crocidolomia pavonana in the laboratory, and to determine the effectiveness of a simple preparation of B. asiatica seeds in supressing oviposition and population of C. pavonana in the field. The mortality bioassays were conducted by a leaf-feeding method. Anti-oviposition activity was assessed by a choice-test in the nursery. The results showed that the ethanol seed extract of B. asiatica possessed strong insecticidal activity against C. pavonana larvae with LC50 of 0.14%. The extract at concentrations of 0.14-1.00% reduced oviposition by C. pavonana female as much as 65.7-95.6%. B. asiatica seeds ground in water for 5 seconds and then immersed for 1 hour at a concentration of 50 g l-1 yielded a simple preparation which was active against C. pavoana larvae. Such simple preparation at a concentration of 75 g l-1 sprayed on cabbage crop effectively suppressed population of C. pavonana larvae in the field.
KARAKTERISASI DAN UJI AKTIVITAS BAKTERI RIZOSFER LAHAN ULTISOL SEBAGAI PEMACU PERTUMBUHAN TANAMAN DAN AGENSIA HAYATI CENDAWAN PATOGEN TULAR TANAH SECARA IN VITRO
Authors: Khaeruni Andi , Sutariati Gusti Ayu Kade , Wahyuni Sri 
Published: January 2021

Characterization and activities assay of rhizosphere bacteria from ultisol land for plant-growth promoting and biocontrol agents of soil-borne fungus pathogens under in vitro test. Although many studies have been conducted to identify the specific traits of the plant growth-promoting and bioprotecting rhizobacteria (PGPBR), they were limited to studying specific PGPBR isolates from ultisol lands. We selected 273 isolates from bulk soil and plant rhizosphere and examined them for a wide array traits that might inhibit the growth of plant pathogens and increase early cucumber growth in ultisol soil. A subsample of 25 isolates, all positively produce chitinase and sellulose enzymes, 18 positively produce protease and 7 were fluorescens on KB medium under UV lighting. All isolates could produce IAA and be able to solubilize phosphor in vitro test, 10 exhibited low level of nitrogenase activity. Futher test showed that out of 25 isolates, 12 inhibited F. oxysporum, P. capsici, R. solani and S. rolfsii in vitro. All isolates increased seed germination, but only 5 isolates significanty increased early cucumber growth in ultisol soil. The results suggest that rhizobacteria be able to produce extracelluler enzymes, siderophore, ACC deasiminase, and IAA or those which are able to solubilize phosphor in vitro may be potential to be uses as biofertilizer and biological control agents in ultisol land.
POTENSI EUPHORBIA HETEROPHYLLA L. SEBAGAI INANG ALTERNATIF PENYAKIT KUDIS PADA UBIJALAR
Authors: Martanto Eko Agus 
Published: January 2021

The Potential of Euphorbia heterophylla as an Alternative Host of Scab Disease on Sweet Potatoes. Scab, caused by Elsinoë batatas (Saw.) Jenkins & Viegas, is a major disease on sweet potato. The disease cause reduction in tuber production up to 30%. Euphorbia heterophylla is one of the common weeds in the cultivated land of sweet potatoes which is considered as an alternative host plant of the scab. The objective of this research was to study the ability of E. heterophylla as an alternative host of sweet potato. This study consisted of identification of sweet potatoes scab symptoms and E. heterophylla spot symptoms, isolation of the pathogen of sweet potato scab and E. heterophylla spot, and the test of pathogen virulence on some sweet potato cultivars. The result showed that the scab symptoms on sweet potatoes was brown and concaved caused by fungi E. batatas, while the spot symptoms on the E. heterophylla was white and convex caused by Fusarium sp. The cultivar of sweet potatoes which were inoculated with sick sweet potatoes suspension showed scab symptoms, however no symptoms occurred on the sweet potatoes which were inoculated with suspension of E. heterophylla. Overall, E. heterophylla was not considered to be the alternative host of scab on sweet potatoes.
PENGGUNAAN PREDATOR UNTUK MENGENDALIKAN KUTU KEBUL (BEMISIA TABACI), VEKTOR PENYAKIT KUNING PADA CABAI DI KABUPATEN TANGGAMUS
Authors: Sudiono Sudiono , Purnomo Purnomo 
Published: January 2021

Application of predators to control whitefly (Bemisia tabaci), an insect vector of yellow diseases of chili in Tanggamus district on dry and rainy season. The yellow disease is one of the important diseases in chili which is transmitted by whitefly. Utilization of natural enemy such as predators is one of some methods in controlling whitefly. This study was conducted in Gisting, Tanggamus District, Lampung province from June 2009 to January 2010. The objective of this research was to determine effectiveness of controlling whitefly by its predators: Menochilus sp., Micraspis sp., and Paederus sp. The results showed that Menochilus, Micraspis, and Paederus could effectively decrease the population of whitefly. The three predators were more effective in rainy than in dry season.
VIRULENSI EMPAT ISOLAT CHILLI VEINAL MOTTLE POTYVIRUS PADA TANAMAN CABAI (CAPSICUM ANNUUM L.)
Authors: Manzila Ifa , Hidayat Sri Hendrastuti , Mariska Ika , Sujiprihati Sriani 
Published: January 2021

Infection of Chilli veinal mottle potyvirus (ChiVMV) has been reported from chilli pepper growing area in Indonesia. Field observation showed wide variation of symptom development starting from mild mottle to severe mottle and vein banding. A research was conducted to study the difference of isolates of ChiVMV collected from West Java (Cikabayan), Central Java (Karadenan), South Kalimantan (Nusa Indah), and West Sumatera (Tanah Datar) based on their response on 10 genotypes of chilli peppers i.e. Jatilaba, Helem, VC246, Keriting Bogor, PBC485, Titisuper, Beauty Bell, Gelora, IPBC Tanjung, and Keriting Sumatera. Each isolates of ChiVMV was mechanically inoculated to each chilli pepper genotype, and observation was conducted every day to record incubation period, symptoms type, and disease incidence. Cikabayan and Nusa Indah isolates were able to infect all chilli pepper genotypes with the shortest incubation period of 3 days in “Tistsuper” and “Beauty Bell” genotypes; whereas Karadenan and Tanah Datar isolates only infected 4 and 6 chilli pepper genotypes, respectively. Although the 4 isolates of ChiVMV showed differences in their host range, but most of them developed similar symptoms ranging from mottle, vein banding, leaf cupping, and malformation. Based on the host response, ChiVMV isolates from Cikabayan and Nusa Indah were considered more virulent than the isolates from Karadenan and Tanah Datar.
EVALUASI KETAHANAN HIBRIDA HASIL PERSILANGAN KACANG HIJAU DAN KACANG UCI TERHADAP Callosobruchus chinensis L. (COLEOPTERA: BRUCHIDAE)
Authors: Ujianto Lestari , Basuki Nur , Kuswanto Kuswanto , Kasno Astanto 
Published: January 2021

The adzuki bean weevil Callosobruchus chinensis is the main pest of mungbean especially during seed storage. Mungbean generally has low yield and is susceptible to main pests. Ricebean (Vigna umbellata (Thunb.) Ohwi & Ohashi) has superior characters such as the high pod number per plant and resistance to many pests. The interspecific hybridization was conducted to combine the superior characters of mungbean and ricebean. The objectives of this research were to evaluate resistance of hybrids of interspecific hybridization between mungbean and ricebean to C. chinensis and to determine pattern of resistant inheritance. Evaluation of resistance to this pest was conducted in bottles by placing 200 hybrid seeds and then 20 C. chinensis adults were introduced into the bottle covered by dense cheese cloth. The bottles were arranged in a completely ramdomized design with three replications. The treatment consisted of eight hybrids and six parents. The results showed that the resistance of the test hybrids to C. chinensis was different among cross combinations. Hybrids of crossing between mungbean Merak variety and yellow ricebean as well as Vima variety and red ricebean were moderately resistant, while the others were resistant. There was resistance improvement of hybrids to C. chinensis. The resistance of the hybrids to C. chinensis was controlled by single gene with partially dominance gene action.
EFIKASI TRICHODERMA HARZIANUM DENGAN BERBAGAI BAHAN ORGANIK DALAM PENGENDALIAN PENYAKIT BUSUK PANGKAL BATANG PADA LADA
Authors: Ginting Cipta , Maryono Tri 
Published: January 2021

The objective of this research was to determine the influence of the kinds of organic matter on the efficacy of Trichoderma harzianum Rifai to control foot rot of black pepper caused by Phytophthora capsici Leonian. Trichoderma spp. were isolated from suppressive and non-suppressive soils taken from black pepper fields with high disease incidence. Screening of Trichoderma spp. isolates was conducted through antagonistic test with dual culture technique. Treatments were arranged in a completely randomized design with six replications. Treatments were rice husk, rice straw, wood dust, Arachis pintoi, mixture of the four organic matters, the mixture without T. harzianum, and without organic matter. The test was conducted in greenhouse with media consisted of soil, organic matter, and sand (2 : 2 : 1, v/v). After being otoclaved, the medium was infested with T. harzianum and P. capsici each with five mycelium plugs of 1-cm diameter. Black pepper seedlings were planted 5 days after fungal infestation. After planting the seedlings, five leaf cuts were partly inserted into the soil on each pot. The variables observed were disease incidence on the leaf cuts inserted into the soil and disease severity on the stems and roots. The results show that all 16 Trichoderma isolates inhibited P. capsici colonies and some isolates showed stronger inhibition than the others. T. harzianum reduced disease severity, but there was no effect of the kinds of organic matter on the ability of T. harzianum to control foot rot.
INDEKS NUTRISI DAN KESINTASAN LARVA SPODOPTERA LITURA F. YANG DIBERI PAKAN MENGANDUNG EKSTRAK KULIT JENGKOL (PITHECELLOBIUM LOBATUM BENTH.)
Authors: Ambarningrum Trisnowati B. , Pratiknyo Hery , Priyanto Slamet 
Published: January 2021

Nutrition indices and survivorship of Spodoptera Litura F. larvae is fed nutrition including jengkol bark extract (Pithecellobium Lobatum Benth). The effect of P. lobatum barks extract on nutrition indices and survivorship S. litura larvae has been investigated. Nutrition indices were observed by giving fifth-instar larvae one of the three diets, every group of diet was added various concentration of barks extract, containing either 1.10; 2.20; or 4.40%. Survivorship were observed by giving first-instar larvae one of the three diets, every group of diet was added various concentration of barks extract, containing either 0.6; 1.2; or 2.4%. The result showed that, the Relative Consumption Rate (RCR), Relative Growth Rate (RGR), Efficiencies of food use (ECD and ECI) value of larvae treated were significantly lower in the case of treated larvae than that of the controls, Approximate Digestibility (AD) value of larvae treated were significantly higher in the case of treated larvae than that of the controls and decrease of survivorship tested larvae.
EFEKTIVITAS Pseudomonas fluorescens TERHADAP PENYAKIT LAYU BAKTERI (Ralstonia solanacearum) PADA TANAMAN KACANG TANAH
Authors: Suryadi Yadi 
Published: January 2021

Effectiveness of Pseudomonas fluorescens against groundnut bacterial wilt (Ralstonia solanacearum). The experiment was conducted to study effectiveness of Pseudomonas fluorescens (PF) soil drenching application against groundnut bacterial wilt disease (Ralstonia solanacearum) suppression. Results showed that PF applications gave significant effect to reduce wilt incidence. The lowest wilt incidence (7.17%) was obtained by three times periodically soil drenching of the growing plant (1 day before planting, 15 days after planting and 30 days after planting) with PF (107 cfu/ml) suspensions. PF applications showed no significant effect on plant height which ranging from 13,07 cm - 15,60 cm. In addition, PF applications showed wet root and pod weight ranging from 0,35 g – 0,83 g and 7,13 g – 9,13 g, respectively which significantly different compared with untreated PF application.
PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP KEMAMPUAN PEMECAHAN MASALAH MAHASISWA
Authors: Oktaviana Dwi , Haryadi Rahman 
Published: January 2021

Tujuan dalam penelitian ini adalah untuk mengetahui apakah peningkatan kemampuan pemecahan masalah mahasiswa dengan model Problem Based Learning (PBL) lebih baik dari pembelajaran langsung. Penelitian ini merupakan penelitian quasi experiment dengan rancangan pretest-posttest control group design. Sampel dalam penelitian ini adalah mahasiswa semester V kelas A dan B IKIP PGRI Pontianak dengan teknik cluster random sampling. Instrumen penelitian yang digunakan adalah soal tes kemampuan pemecahan masalah pada mata kuliah matematika diskrit. Hasil penelitian menunjukkan bahwa terdapat peningkatan kemampuan pemecahan masalah dimana pengujian hipotesis dengan menggunakan uji Mann-Whitney diperoleh nilai Asymp. Sig. (2-tailed) sebesar 0,000 lebih kecil dari 0,05 maka rata-rata kemampuan pemecahan masalah dengan menggunakan model PBL lebih besar daripada rata-rata kemampuan pemecahan masalah dengan menggunakan pembelajaran langsung. Dari hasil penelitian dapat disimpulkan bahwa mahasiswa yang pembelajarannya menerapkan pembelajaran dengan model PBL peningkatan kemampuan pemecahan masalah secara signifikan lebih baik dibandingkan dengan siswa yang pembelajarannya menggunakan pembelajaran langsung. The purpose of this study was to determine whether the increase in student problem solving abilities with the Problem Based Learning (PBL) model was better than direct learning. This research is a quasi experimental study with a pretest-posttest control group design. The sample in this study were the fifth semester students of class A and B IKIP PGRI Pontianak with cluster random sampling technique. The research instrument used was a test problem solving ability in discrete mathematics courses. The results showed that there was an increase in problem solving abilities where hypothesis testing using the Mann-Whitney test obtained Asymp. Sig. (2-tailed) of 0,000 less than 0,05, the average problem solving ability using the PBL model is greater than the average problem solving ability using direct learning. From the results of the study, it can be concluded thet students whose learning applies PBL model increase their problem solving abilities significantly better than students whose learning used direct learning.
Project-Based English Language Instruction: A Study of Secondary School Learners in India
Authors: Zaidi Syed Faiz 
Published: January 2021

The idea of Project-Based Learning (PBL) is based on a holistic instructional strategy, which is becoming more meaningful in today’s society as teachers increasingly teach groups of young learners having different learning styles and ability levels. These learners primarily come from the northern part of India and have not been properly exposed to the learning of English because of varied linguistic, cultural, schooling and social backgrounds. The study aims at assessing the effectiveness of PBL in teaching young learners (14-16 years of age) Aligarh Muslim University, India. The methods employed in the study rely on data obtained with both qualitative and quantitative research instruments. Keywords: Project-based language instructions, project-based learning
The Effect of Strategy-Based Instruction on Students’ Speaking Skills atLakidende University
Authors: . Irawati , . Haryanto , Dollah Syarifuddin 
Published: January 2021

This study aimed at investigating the effect of strategies-based instruction on students’ speaking skill at Lakidende University and the students’ interest in learning English through strategies-based instruction. This research employed Quasi Experimental Method, with non-equivalent control group design. This research assigned experimental group and control group (30 students for each).Speaking test was used to see the effect of strategies-based instruction on students’ speaking skill and questionnaire was used to see students’ interest in learning English through strategies-based instruction. The data obtained through the speaking test were analyzed by using descriptive statistics and inferential statistics. Meanwhile, the data from questionnaire were analyzed in percentage and descriptive statistics. The students’ speaking skill covered three components: accuracy, fluency, and comprehensibility. The findings showed that there was an improvement on the students’ speaking ability after the treatment. There was a significant difference between the results of post-test of experimental and control group, where the mean score of post-test of experimental group was 70.37, which was higher than the mean score of post-test of control group was 59.63.The value of P-value or sig. (2-tailed) shows that P-value or sig. (2-tailed) is smaller than α (0.00 < 0.05).Furthermore, the data that were collected from questionnaire showed that the students were very high interest toward strategies-based instruction. It is showed by the mean score in scale of 89.6, which was categorized as very high interest. Keywords: effect, strategy-based instruction, speaking skill
THE EFFECTIVENESS OF VOCABULARY-BASED-INTEGRATED ACTIVITIES IN IMPROVING THE STUDENTS’ VOCABULARY COMMAND
Authors: Alimuddin Andi Haeriati 
Published: January 2021

Finding a method to be used in vocabulary teaching and learning for students with different learning style is a big challenge for English teachers at SMA Negeri 1 Soppeng Riaja as the result of preliminary study found that the students’ vocabulary command is still low and the teacher promoted less awareness of students’ learning styles in vocabulary learning. An exploratory research was conducted to investigate the effectiveness of Vocabulary-based Integrated Activities in improving the students’ vocabulary command by involving the second year students of natural science class of SMA Negeri 1 Soppeng Riaja in academic year 2012/2013. It is concluded from quantitative and qualitative findings that the Vocabulary-based Integrated Activities are: (1) most effective to improve the students’ vocabulary command in terms of knowing, understanding the words and how they are said and written; (2) most effective to improve the students’ vocabulary command in terms of using the words in written form; (3) effective to improve the students’ ability the students’ vocabulary command in terms of using the words in oral form; (4) able to cover all students with different learning style, because there is no significant difference of vocabulary command among visual, auditory, and haptic students after they were taught by the method. In addition, students have good perception of the Vocabulary-based Integrated Activities. Key words: Vocabulary-based Integrated Activities, Vocabulary Command Learning Style
Do Male and Female Students Learn Differently?
Authors: Jamiah Jamiah , Mahmud Murni , Muhayyang Maemuna 
Published: January 2021

This paper points out the gender differences in English learning.It investigated students’ language learning strategies as affected by gender differences. The data collected in 2015 from 15 male students and 15 female students’ of second grade at SMA Negeri 11 Makassar. It is to reveal their differences in English learning and the effect of gender differences in choosing language learning strategies. It is indicated that the entire student used six language learning strategies namely memory strategy, cognitive strategy, compensation strategy, metacognitive strateg, affective strategy and social strategy but they had different ways in using them. Mostly, females used social strategy because they were more emphatic, social thinking and like cooperating with their peers while the males refered to the compensation startegy because their characteristics were more confident, fun, logical, active in expressing their opinion. So, it was concluded that gender differences affect in choosing language learning strategies of male and female students at SMA Negeri 11 Makassar.Keywords: language learning strategy, gender differences, classroom interaction