scholarly journals Hubungan antara Penyobekan Daun Secara Mekanik terhadap Serangan Penggulung Daun Pisang

2020 ◽  
Vol 22 (1) ◽  
pp. 7
Author(s):  
Isnadian Yandhi Pratiwi ◽  
Supriyadi Supriyadi ◽  
Sholahuddin Sholahuddin
Keyword(s):  
Field Experiment ◽  
Leaf Damage ◽  
Mechanical Control ◽  
Central Java ◽  
Experiment Method ◽  
Damage Number ◽  
Attack Intensity

<p>Mechanical control as an effort to reduce <em>Erionata thrax</em> attacks needs to develop of them was torning the leaves. The objective of this research was to determine the effect of leaf torning on the intensity of the damage and determine the level of <em>E</em><em>.</em><em> thrax</em> attack damage in various cultivars. This research was conducted in Semarang, Central Java from September-December 2018. This research used a field experiment method with four treatments of tearing distance of 0 cm, 20 cm, 30 cm, and 40 cm in four banana cultivars, namely Mas Kirana, Ambon, Kepok, and Raja Bulu. The result showed that leaf damage was related to torning distance, but not to the cultivars. The value of regression between torning distance and leaf damage was very low. The torning distance of 40 cm had the highest leaf damage, number of larvae populations, and number of leaf rolls. The torning distance of 20 cm reduced the leaf damage, the number of larvae populations and the number of rolls. The lowest leaf damage is in Mas Kirana cultivar and the highest leaf damage is in Raja Bulu cultivars. Raja Bulu cultivar had the highest attack intensity.</p>

scholarly journals PENGARUH LATIHAN BENCH PRESS TERHADAP KECEPATAN PUKULAN STRAIGHT PADA CABANG OLAHRAGA TINJU

2020 ◽  
Vol 11 (2) ◽  
pp. 79
Author(s):  
Ricardo V. Latuheru ◽  
Andi Rizal
Keyword(s):  
Data Analysis ◽  
Field Experiment ◽  
Random Sampling ◽  
Bench Press ◽  
T Test ◽  
Significance Level ◽  
Data Analysis Technique ◽  
Analysis Technique ◽  
Experiment Method

This study aims to determine the effect of bench press exercises on the speed of straight punches in boxing. By using the field experiment method. The population used was boxing athletes in Makassar with a sample of 20 people taken by proportional random sampling from AMA Makassar club boxing athletes. The data analysis technique used is the t-test at 95% significance level. The results showed that; Bench press exercises have a significant effect on the speed of straight punches in boxing, proved t0 = 49,252> tt = 2,262.

scholarly journals Changes in species composition of weeds and their number in potato under the influence of different of weed control method

2013 ◽  
Vol 55 (2) ◽  
pp. 209-220
Author(s):  
Katarzyna Zarzecka
Keyword(s):  
Species Composition ◽  
Field Experiment ◽  
Weed Control ◽  
Control Method ◽  
Potato Cultivars ◽  
Weed Species ◽  
Mechanical Control

In a strict field experiment we have studied the influence of different weed control method on the species composition and the number on weeds occurring in a field of four potato cultivars. The application of herbicides decreased the number of weeds, as compared with the number obtained for mechanical control by 1,9-5,1 times at the beginning ofthe vegetation and by 1,5-3,7 times prior to tubers harvest. The herbicides considerably reduced the composition of weed species, moreover.

THE INFLUENCE ANALYSIS OF DIFFERRENTLY CONSTRUCTED FOLDED TRAPS AND TYPES OF BAITS TO CATCH CRABS [Portunus pelagicus, (Linnaeus,1758)] IN REMBANG SEA WATERS

2016 ◽  
Vol 78 (4-2) ◽  
Author(s):  
Herry Boesono ◽  
Sansan Sansan ◽  
Agus Suherman
Keyword(s):  
Field Experiment ◽  
Small Scale ◽  
Marine Resources ◽  
Homogeneity Test ◽  
Fishing Gear ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Anova Test ◽  
Central Java ◽  
Normality Test

Blue Swimming Crab [Portunus pelagicus (Linnaeus,1758)] is one of the fishery commodities which is prospective to be exported, highly nutritious, commercial, and wholly valuable. In Kabongan lor village, Rembang, Central Java, Indonesia the fishing gear used to catch crabs is folded trap. Kabongan lor village has a small scale of captured marine resources, so it needs to be utilized further. Because of its large potency, a research need to be conducted to improve the haul. Different trap construction and type of baits is one important factor to improve it. This study was aimed to analyze the influence of the dome-folded traps construction and box-folded traps (control), and the influence of fermented mackerel, fresh mackerel, and puffer fish’s head as baits over the crabs in Rembang waters. The method applied is field experiment with six repetitions and two variables in a treatment. The data was analyzed using normality test, homogeneity test, and ANOVA test using SPSS program ver 20.00. The results showed that dome-folded traps gained more crabs compared to box-folded traps (control). Dome-folded traps gained 3 230 g of crabs, while box-folded traps gained 1 620 g. Meanwhile, the use of fresh mackerel as baits gained better crabs than fermented mackerel and puffer fish’s head (control). According to this research known that the captured crabs in which consume; fresh mackerel baits got 1 890 g of crabs, fermented mackerel got 1 500 g and 1 460 g for puffer fish’s head. The results of ANOVA test show the differences of folded traps construction with F sig value as much as 0.022 shows that Ho is accepted; while that with F sig value as much as 0.686 shows that the Ho is denied. Based on these results known that the different folded traps construction does affect to the amount of captured crabs while the differences of baits type do not.

scholarly journals Population Incidence and Efficacy of Chemical Control against Rice Leaffolder (Cnaphnalocrocis medinalis Guenee) (Pyralidae: Lepidoptera)

2019 ◽  
pp. 1-7
Author(s):  
Muhammad Bilal ◽  
Mubashar Hussain ◽  
Muhammad Umer ◽  
Numan Ejaz ◽  
Hamza Armghan Noushahi ◽  
...  
Keyword(s):  
Field Experiment ◽  
Chemical Control ◽  
Leaf Damage ◽  
Yield Losses ◽  
Kharif Season ◽  
Population Incidence ◽  
Lambda Cyhalothrin ◽  
Percent Increase ◽  
Rice Leaffolder ◽  
Research Institute

Rice leaffolder has become a serious pest in the last two decades. It causes up to 50 to 70 percent leaf damage and consequently up to 46 percent yield losses in case of severe infestation. A field experiment was conducted at Rice Research Institute, Kala Shah Kaku Punjab Pakistan in which population incidence of rice leaffolder and efficacy of different insecticides evaluated. Population observed form end August to termination of Kharif season. Highest population of rice leaffolder was recorded in September and October. Insecticides, proved, viz., Karate 2.5EC (Lambda cyhalothrin) @ 160ml 86.65%, Pravo 10EC (fipronil +lambda cyhalothrin) @ 300 ml 85.25%, Hoopoe 4G (cartap hydrochloride) @ 9 kg 85.85, Oncol 3G (Benfuracarb) @8 Kg 89.53%, Mover Plus 4.3G (cartap hydrochloride) @ 4.5 Kg 82.77%, Star 4G (cartap hydrochloride) @ 9 kg 78.40%, Padan 4G(cartap hydrochloride) @ 9 kg 86.83%, Virtako 0.6G (thiamethoxam + chlorantraniliprole) @ 4 kg 72.05%, Ferterra 0.4G (Chlorantraniliprole) @ 4 kg 91.21%, Paidan 8G (Cartap hydrochloride) 8 kg 84.18% effective. Insecticide treatedplots yielded higher than the control. Highest 3.62 t/ha was recorded with Hoopoe 4G and lowest with Star 4G 2.99 t/ha as compared to 1.95 t/ha of control. All treatments were statistically at par with each other but significantly different from control. In case of yield benefits, 34.78 percent to 46.27 percent increase was recorded. All the treatments were proved statistically at par against beneficial fauna.

scholarly journals Pemangsaan Propagul Mangrove Rhizophora sp. Sebagai Bukti Teori Dominance-Predation (Predation of Mangrove Propagule, Rhizophora sp. as Evidence of Dominance-Predation Theory)

2014 ◽  
Vol 19 (2) ◽  
pp. 105 ◽  
Author(s):  
Rudhi Pribadi ◽  
Achmad Muhajir ◽  
Widianingsih Widianingsih ◽  
Retno Hartati
Keyword(s):  
Field Experiment ◽  
Forest Floor ◽  
Predation Rate ◽  
Survey Sampling ◽  
Rhizophora Mucronata ◽  
Rhizophora Stylosa ◽  
The Third ◽  
Central Java ◽  
Propagule Predation

Pemangsaan sering mentebabkan kegagalan propagul mangrove untuk tumbuh menjadi individu baru. Pemangsaan terjadi saat propagul masih bergantung pada pohon induk atau pra-penyebaran maupun setelah terlepas dan jatuh dari pohon induk atau paska-penyebaran. Penelitian ini bertujuan untuk mengetahui tingkat pemangsaan propagul Rhizophora mucronata Lamk., R. stylosa Griff. dan R. apiculata Blume di Desa Pasar Banggi, Kabupaten Rembang, Jawa Tengah. Penelitian terdiri dari 3 tahap yaitu penelitian pendahuluan untuk mengetahui dominasi spesies, penelitian deskriptif pada pra-penyebaran tentang pemangsaan propagul pra-penyebaran dan penelitian eksperimental untuk mengetahui hubungan antara dominasi spesies dengan tingkat pemangsaan propagul paska-penyebaran. Tingkat pemangsaan propagul pra-penyebaran R. stylosa terbukti paling tinggi tingkat pemangsaannya yaitu 61,06% (kisaran 45,40-76,05%), disusul R. apiculata 58,18% (47,41-68,00%) dan terendah R. mucronata 11,88% (7,06-15,71%). Selama 18 hari pengamatan tingkat pemangsaan propagul R. stylosa paling rendah di stasiun yang didominasi R. stylosa (46,67%) dibandingkan di stasiun yang di dominasi R. apiculata (63,33%) maupun R. mucronata (83,33%). Pemangsaan propagul R. mucronata paling tinggi di stasiun yang didominasi R. mucronata (95%) dibandingkan di stasiun yang di dominasi R. apiculata (55%) maupun R. stylosa (45%). Pemangsaan propagul R. apiculata paling rendah di stasiun yang didominasi R. apiculata (50% ) dibandingkan di stasiun yang di dominasi R. stylosa (70%) maupun R. mucronata (73,33%). Hasil penelitian ini berhasil membuktikan teori dominance-predation pada spesies R. stylosa dan R. apiculata, namun tidak pada R. Mucronata. Kata kunci: pemangsaan, propagul, pra-penyebaran, paska-penyebaran, mangrove  Propagule predation on mangrove in some extent reduced its viability to grow into seedling. The predation could happened before (pre-dispersal) or after (post-dispersal) the propagule drop from the tree.The reasearch was conducted in Pasar Banggi, Rembang District, Central Java. The aim was to investigate the predation rate of Rhizophora mucronata Lamk., R. stylosa Griff. and R. apiculata Blume propagules pre-dispersal and post-dispersal. Firstly, preface experiment for find domination spesies in the location, Second, with applied descriptive-based survey sampling and field experiment methods. Than all propagules of five replication trees were harvested and checked for its condition on pre-dispersal step. The third, with post-dispersal study there were twenty propagules from each spesies and tied them with used nylon string and placed on the forest floor for 2 until 18 days and checked its condition every 2 days after placement. This study is also set for tested the Smith’s theory on propagule predation related to tree domination. Rhizophora stylosa propagule was  most predated before they fall (mean 61,06%, range 45,40-76,05%), followed by R. apiculata (mean 58,18%, range 47,41-68%) and the lowest isR. mucronata with mean 11,88% (range 7,06-15,71%). After 18 days of experiment in the field R. stylosa propagule in R. stylosa–dominated area was the lowest predated (mean 46,67%) compared to propagule in the area dominated by R. apiculata (63,33%) and also in R. mucronata area (83,33) Predated R. mucronata propagule is the highest in the R. mucronata dominated area (mean 95%) compared with R. apiculata dominated area (mean 55%) and also in R. stylosa dominated area (45%). Pradated of R. apiculata propagule is the lowest in the domination area of R. apiculata (50% ) compared with R. stylosa area domination with (mean 70%) also R. mucronata (73,33%). The result showed that the theory of dominance-predation can be proved only for R. stylosa and R. apiculata spesies, but not for R. mucronata spesies. Keywords : propagule, predation, pre-dispersal, post-dispersal, mangrove

scholarly journals Intensitas serangan Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) pada pertanaman jagung di Kabupaten Garut dan Tasikmalaya, Jawa Barat

2020 ◽  
Vol 17 (3) ◽  
pp. 163
Author(s):  
Wara Asfiya ◽  
Vani Nur Oktaviany Subagyo ◽  
Anik Budhi Dharmayanthi ◽  
Fatimah Fatimah ◽  
Rina Rachmatiyah
Keyword(s):  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
The Other ◽  
Leaf Damage ◽  
Control Methods ◽  
West Java ◽  
Corn Production ◽  
Plant Damage ◽  
Lepidoptera Noctuidae ◽  
Attack Intensity

<p>The presence of <em>Spodoptera frugiperda</em> J.E. Smith or fall armyworm (FAW) have now detected in West Java. However, no information is available on their attack intensity even though the data is crucial for the implementation of appropriate control methods. The investigations were carried out in Garut (Limbangan, Wanaraja, dan Banyuresmi) and Tasikmalaya (Sukaratu) Regencies from 25 to 27 February 2020. At each location, 100 plants were selected for recording observations on leaf damage following the Davis Scale. The results showed the attack intensity in Wanaraja (34,78%), Banyuresmi (34.78%), and Sukaratu (39.89%) showed moderate damage. On the other hand, Limbangan one of the corn production center, showed high damage with the intensity of the pest up to 52.78%. The attack intensity of FAW tends to correlate with their attack level. This means that plant damage levels increasing at higher attack levels.</p>

scholarly journals KAJIAN MACAM PUPUK HAYATI TERHADAP INTENSITAS KERUSAKAN HAMA BELALANG PADA TANAMAN JAGUNG HITAM

2020 ◽  
Vol 22 (1) ◽  
pp. 29
Author(s):  
Aulia Wahyu Dewantara ◽  
Dewi Ratna Nurhayati ◽  
Sartono Joko Santosa
Keyword(s):  
Block Design ◽  
Fertilizer Treatment ◽  
Fresh Weight ◽  
Central Java ◽  
Randomized Block Design ◽  
Maize Plants ◽  
Biological Fertilizer ◽  
Attack Intensity ◽  
Range Test ◽  
Research Show

This study is entitled Study of Biofertilizer Types of Grasshopper Pest Intensity on Black Corn (Black Aztec) with the aim to study the types of biological fertilizer on grasshopper pest intensity. which began on November 9, 2019, in Jembangan Hamlet, Gagaksipat Village, Ngemplak District, Boyolali District, Central Java, with a height of 150m (asl). This research uses factorial basic design complete randomized block design (RCBD) arranged in a single factor consisting of 10 treatments 3 replications. From the results of this study were analyzed with the Dancun multiple range test (Duncan Multiple Range Test / DMRT) at a level of 5%. Observations observed included: symptoms of attack, intensity of attacks, fresh weight of cob with skin, fresh weight of stover, weight of 100 seeds. The results of the research show that: (1) Symptoms of locust pest attacks appear evenly on Biotogrow biofertilizers, symptoms of pest attacks begin to appear at the age of 20 days after planting. (2) The treatment of biological fertilizers affects the intensity of pest attacks on maize plants with the highest Biotogrow biofertilizers namely 22.6 and the lowest attacks on Megarizho fertilizers namely 13.8. (3) Megarizho biological fertilizer treatment can reduce locust pest attack,.

scholarly journals Methane flux from high-yielding Inpari rice varieties in Central Java, Indonesia

2020 ◽  
Vol 17 (2) ◽  
pp. 129
Author(s):  
Anicetus Wihardjaka ◽  
Eni Yulianingsih ◽  
Hesti Yulianingrum
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Growth Parameters ◽  
Block Design ◽  
Tiller Number ◽  
Growth Stages ◽  
Total Biomass ◽  
Rice Varieties ◽  
Central Java ◽  
Root Aerenchyma

<p>Rice cultivation is a source of greenhouse gas emissions, particularly methane (CH<sub>4</sub>). One of the factors that affect CH<sub>4</sub> emissions from rice fields is rice cultivar. In this study, a field experiment was conducted to determine CH<sub>4</sub> emissions from various high-yielding inbred varieties and the relationship between CH<sub>4</sub> emissions and rice growth parameters. The field experiment was conducted in Jaken, Pati Regency, Central Java province, during the wet season of 2014/2015. The experiment was arranged using a randomized block design with three replications and several cultivar treatments (Inpari 13, 18, 19, 20, 23, 24, 29, 30, 31, 32, and 33, with Ciherang as the comparison cultivar). The data collected includes CH<sub>4</sub> flux, plant height, tiller number, biomass, grain yield, and root aerenchyma area. The CH<sub>4</sub> flux was measured at several critical growth stages. The Inpari 24, Inpari 13, and Inpari 19 demonstrated CH<sub>4</sub> emissions reduced by as much as 36.1%, 32.8%, and 21.3%, respectively, compared to Ciherang. The Inpari 13 and Inpari 24 varieties had significantly lower emission indices than Ciherang and the other Inpari varieties, with 17 and 20 g CH<sub>4</sub> per 1 kg grain yield, respectively. CH<sub>4</sub> flux was found to correlate significantly with tiller number per hill, total biomass, and root aerenchyma area at the panicle initiation growth stage.</p>

Performance of sorghum genotypes under zero tillage conditions in rice fallows with reference to stem borer, Chilo partellus (Swinhoe)

ENTOMON ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 57-64
Author(s):  
P. Yogeswari ◽  
C. Sandhya Rani ◽  
G. Ramachandra Rao
Keyword(s):  
Field Experiment ◽  
Chilo Partellus ◽  
Significant Positive Correlation ◽  
Stem Borer ◽  
Leaf Damage ◽  
Zero Tillage ◽  
Tunnel Length ◽  
Positive Correlation ◽  
Sorghum Genotypes

A field experiment was carried out to screen the sorghum genotypes against stem borer in rice fallow under zero tillage condition. Based on mean stem tunnel length the genotypes were categorized as least susceptible (0-5 cm), moderately susceptible (5-10 cm), highly susceptible (>10 cm). The resistant check CSH 16 (C) found as least susceptible with 4.65 cm, whereas, NTJ-2 (C), NLCW-6 and N-14 were found to be highly susceptible as they recorded 10.45, 10.46 and 11.44 cm mean stem tunnel length respectively. The remaining genotypes found as moderately susceptible with 6.60 to 9.84 cm mean stem tunnel length. There is non-significant positive correlation between numbers of larvae with leaf damage, dead hearts stem tunneling, white ears and per cent chaffy grains, but it was negative with tiller damage.

scholarly journals Effect of Planting Dates on Growth and Yield of Four Cultivars of Wheat

2021 ◽  
Vol 923 (1) ◽  
pp. 012064
Author(s):  
Mahmood T. Al-Jayashi ◽  
Ali A.S. Hawal ◽  
Alyaa Muayad Adham
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Flag Leaf ◽  
Block Design ◽  
Planting Date ◽  
Growth And Yield ◽  
Research Station ◽  
Planting Dates ◽  
Randomized Complete Block Design ◽  
Experiment Method

Abstract A field experiment was applied at the research station in Al-Najmi district, Al-Muthanna governorate during the agricultural season 2020-2021, to determine evaluating several cultivars of wheat by changing the date of their cultivation. The experiment was applied using the split plot using the Randomized complete Block Design(RCBD) with three replicates experiment method, where the planting dates were occupied (1/11, 15/11, 1/12 and 12/15) the main plots, while the cultivars (Baghdad, Furat, Rashid, and Wafia) occupied the secondary plots and with three replicates. The results showed that the planting date (1/12) was superior to the number of days up to 75% of flowering, the number of spikes. m−2, and the grain yield ton. ha−1, which amounted to 109 days, 409.9 spikes and 5.77 tons, respectively. While the planting date (15/11) exceeded in both characteristics the leaf area and the number of grains in the spike, as it reached 46.18 cm and 49.78 grains. As for the cultivaries, the Baghdad cultivar surpassed in the characteristics of the area of the flag leaf, the number of fertile spikes, the number of grains per spike, and the grain yield, which reached 44.70 cm, 395.7 spikes.m−2, 48.38 grains, spike−1 and 6.16 tons.ha−1, respectively.

Sign in / Sign up

Export Citation Format

Share Document