scholarly journals TINGKAT KETERJADIAN PENYAKIT LAYU STEWART PADA BENIH DAN RESPON BEBERAPA VARIETAS JAGUNG TERHADAP INFEKSI Pantoea stewartii subsp. stewartii

2013 ◽  
Vol 13 (1) ◽  
pp. 1-9
Author(s):  
Haliatur Rahma ◽  
Meity S Sinaga ◽  
Memen Surahman ◽  
Giyanto Giyanto

Disease incidence of Stewart’s wilt on the seed and response of several maize varieties to Pantoea stewartii subp. stewartii. Stewart’s wilt disease of maize is caused by Pantoea stewartii subsp. stewartii.  This bacterium is seed-borne pathogens, when attacked maize caused yield lost 40-100%.  The objective of this research was to detemine the incidence level of stewart’s wilt disease, growth of some varieties of maize and their response to stewart’s wilt pathogens Pantoea stewartii subsp. stewartii.  The research was conducted in the Laboratory of Bacteriology and Greenhouse Cikabayan IPB from November 2011 to March 2012. In experiment I, nineteen samples of maize were used for symptom test  in the maize seedling stage, using Randomized Block Design with three replications. Experiment II used a Randomized Block Design with 2 factors: maize varieties (8 hybrids varieties, 3 open pollinated varieties, and 7 sweet corn varieties) and bacteria isolates  (BGR 2, BGR 4, BGR 28, BGR7 and PSM 27), with three replications. The results showed in experiment I, the incidence of stewart’s wilt disease ranged 2.00 – 15.33%, germination and vigor index of maize seed were 68.00 – 95.33% and 55.33 – 90.67% respectively.  While in experiment II, hybrid and open pollinated of maize varieties were resistant to moderately susceptible   while all sweet corn varieties were susceptible to infection of Pantoea stewartii subsp. stewartii.

2011 ◽  
Vol 11 (1) ◽  
pp. 102-111
Author(s):  
Netty Suharti ◽  
Trimurti Habazar ◽  
Nasril Nasir ◽  
Dachryanus Dachryanus ◽  
Jamsari Jamsari

Bacterial wilt disease caused by Ralstonia solanacearum race 4 is a yield-limiting disease of ginger. A study to investigate the ability of indigenous Arbuscular Mycorrhizae Fungi (AMF) to reduce bacteria wilt disease has been done. This research was designed by using Randomized Block Design (RBD) at greenhouse experiments, using eight AMF isolates with six replication. As supporting data, population R. solanacearum race 4 after treatments was assesed. The results showed that aplication of indigenous AMF  to ginger rhizome as seed treatment dicreased disease incidence, support ginger growth and production such as the seedling formation 150%, plant height 98.6%, the number of leaf 115,7%.  As the result yield of ginger rhizome increased by 400 % and phyloplan 598,3%, respectively, compared to the control.


AgriPeat ◽  
2019 ◽  
Vol 20 (01) ◽  
pp. 19-26
Author(s):  
Admin Journal

ABSTRACTThe role of Trichocompost and KCl fertilizer to control Fusarium wilt disease on onion in sandy soil. Fusarium wilt on onion is an interesting disease it is can loss the onion yield. The purpose of research to study trichocompost and KCl fertilizer role to control Fusarium wilt disease on ann onion. The research design used a Factorial Randomized Block Design with 2 factors. The first factor is 4 levels trichocompost, it is: without trichocompost (T0), trichocompost 10 t.ha-1 dosage (T1), trichocompost 20 t.ha-1 dosage (T2), trichocompost 30 t.ha-1 dosage (T3). The second factor is 3 levels KCl fertilizer, it is: without KCl (K0), KCl 100 kg.ha-1 dosage (K1), KCl 200 kg.ha-1 dosage (K2). Result of this research showed the application of trichocompost 10 t.ha-1 dosage and KCl 100 kg.ha-1 dosage can inhibit Fusarium wilt incubation time, can inhibit the patogen development with effective value 89,23%, the single factor it is aplication trichocompost 10 t.ha-1 dosage and trichocompost 30 t.ha-1 dosage not significant to dried onion bulb weight per clump of onion plant.Key words: Trichocompost, KCl fertilizer, Fusarium wilt disease, onion, sandy soil.ABSTRAKPenyakit layu Fusarium merupakan salah satu penyakit penting dapat menurunkan produksi bawang merah hingga 50%. Tujuan penelitian untuk mengetahui peranan trichokompos dan pupuk KCl dalam mengendalikan penyakit layu fusarium pada tanaman bawang merah. Penelitian menggunakan Rancangan Acak Kelompok faktorial dua faktor perlakuan. Faktor pertama 4 taraf dosis trichokompos yaitu: tanpa trichokompos (T0), trichokompos dosis 10 t.ha-1 (T1), trichokompos dosis 20 t.ha-1 (T2), trichokompos dosis 30 t.ha-1 (T3). Faktor kedua 3 taraf dosis pupuk KCl yaitu: tanpa pupuk KCl (K0), pupuk KCl dosis 100 KCl kg.ha-1 (K1), pupuk KCl dosis 200 KCl kg.ha-1 (K2). Hasil penelitian menunjukkan pemberian trichokompos 10 t.ha-1 dan pupuk KCl 100 kg.ha-1 dapat memperpanjang masa inkubasi penyakit, menekan serangan penyakit layu Fusarium dengan nilai efektivitas sangat baik (89,23%), perlakuan tunggal trichokompos dosis 10 t.ha-1 tidak berbeda nyata dengan dosis 30 t.ha-1 terhadap bobot umbi kering per rumpun tanaman bawang merah.Kata kunci: penyakit layu Fusarium, pupuk KCl, tanah berpasir, tanaman bawang merah, trichokompos.


2011 ◽  
Vol 29 (4) ◽  
pp. 531-536 ◽  
Author(s):  
Angela Kwiatkowski ◽  
Edmar Clemente ◽  
Carlos Alberto Scapim

In Brazil, the greengrocery market of sweet corn has been expanding along the country. In contrast, there have been few agri-industries canning sweet corn (Zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. The purpose of this study was to evaluate the general combining ability (GCA) of seven inbred lines of sweet corn, and the specific combining ability (SCA) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. In the growing season 2006/2007, twenty-one single hybrids were evaluated in the Iguatemi Research Station, Maringá County, Northwestern Paraná, in Brazil using a complete randomized block design with four replications. Data were subjected to the analysis of variance and the genotypes were clustered by the Scott-Knott test. We estimated the GCA and SCA effects using the Griffing's method IV with the fixed model for plant height (PH), height of ear (EH), dehusked ears yield (DEY), reducing (RS) and total sugars (TS), starch (ST), proteins (PTN), ether extract (EE) and fibers (FB). The inbred line L4, which was originated from the 'Doce de Cuba', had the best GCA for crop yield and grain quality and therefore should be used in the next hybrid combinations. The hybrids L4xL5 and L3xL7 were the most promising with regard to crop yield and grain quality.


2018 ◽  
Vol 14 (2) ◽  
pp. 14-28
Author(s):  
Bukhari Bukhari ◽  
Nuryulsen Safridar

This research was conducted in Pante Cermin, Padang Tiji Subdistrict, Pidie District. in March to August 2015, with the aim to know the use efficienci of Trichoderma sp on the growth of several types of Banana seedlings (Musa Paracica L.) This research using Randomized Block Design (RAK) factorial pattern with the factors studied is the type of banana and trichoderma dose . Both factors consist of 4 levels: Banana Barangan (J1), Ambon banana (J2), Banana King (J3) and Geupok banana (J4). While the dose of Tricoderma sp is: TO = 0 g / seeds T1 = 15 g / seeds T2 = 30 g / seedlings and T3 = 45 g / seedlings. So there are 16 treatment combinations and repeated 3 times, which resulted in 48 experimental units.To determine the influence of each treatment and its interaction on the growth of banana seedlings, the analysis of variance (Test F) and continued with the test of Beda Nyata Jujur (BNJ) at 5% level.The results showed that the growth of good banana seedlings among 4 species studied was shown by Barangan bananas, but not unlike bananas. However, trichoderma administration until the age of 4 months has not shown the growth and intensity of different attacks. So it should be extended the study period to 6 months. After 6 months of research there has been a difference in growth and intensity of attack, where the intensity of the greatest attack is shown by T0 (without trichoderma). Medium intensity of smallest attack is shown by T3 (Dose trichoderma sp 45 gr / banana seedlings). The type of banana does not affect the growth and intensity of fusarium wilt attack. and the interaction of these two factors had no significant effect on the growth of banana seedlings and the intensity of Fusarium wilt disease.


2010 ◽  
Vol 10 (3) ◽  
pp. 183-190 ◽  
Author(s):  
Aracelle Assunção ◽  
Edward Madureira Brasil ◽  
Jaison Pereira de Oliveira ◽  
Américo José dos Santos Reis ◽  
André Ferreira Pereira ◽  
...  

Heterosis and its components were evaluated in a diallel crossing system of sweet corn. In the 38 treatments, eigth parents, 28 hybrids and two controls were used, arranged in a randomized block design with three replications.The diallel analysis followed the methodology of Gardner and Eberhart (1966). The following traits were evaluated: male and female flowering, plant and ear height, ear index (number of ears/number of plants), ºBrix, total ear weight, standard ear weight, industrial yield and total sugar content. There was genetic variability among genotypes, with significant differences except for the traits ear index, industrial yield and ºBrix.Heterosis was found for most traits. The mean heterosis of hybrids compared with the parents was positive for most traits. There was a contribution of additive and dominance effects.The contribution of dominant genes was greatest to flowering, plant and ear height and standard ear weight.


2014 ◽  
Vol 81 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Lindsey Burbank ◽  
Mojtaba Mohammadi ◽  
M. Caroline Roper

ABSTRACTIron is a key micronutrient for microbial growth but is often present in low concentrations or in biologically unavailable forms. Many microorganisms overcome this challenge by producing siderophores, which are ferric-iron chelating compounds that enable the solubilization and acquisition of iron in a bioactive form.Pantoeastewartiisubsp.stewartii, the causal agent of Stewart's wilt of sweet corn, produces a siderophore under iron-limiting conditions. The proteins involved in the biosynthesis and export of this siderophore are encoded by theiucABCD-iutAoperon, which is homologous to the aerobactin biosynthetic gene cluster found in a number of enteric pathogens. Mutations iniucAandiutAresulted in a decrease in surface-based motility thatP. stewartiiutilizes during the early stages of biofilm formation, indicating that active iron acquisition impacts surface motility forP. stewartii. Furthermore, bacterial movementin plantais also dependent on a functional siderophore biosynthesis and uptake pathway. Most notably, siderophore-mediated iron acquisition is required for full virulence in the sweet corn host, indicating that active iron acquisition is essential for pathogenic fitness for this important xylem-dwelling bacterial pathogen.


Kultivasi ◽  
2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Rommy Andhika Laksono ◽  
Nurcahyo Widyodaru Saputro ◽  
Muhammad Syafi’i

Abstract. Sweet corn production in Indonesia can be increased by intensification program, such as the use of superior cultivars, the use of balanced fertilizer, and the use of organic fertilizer. Objective of the research was to study Integrated Crop Management System, that related to use of fermented organic fertilizer (bokashi) which suitable to sweet corn crop, especially in lowland area of Karawang district. The method of research was experiment. The experimental design was Randomized Block Design, that consisted of 16 treatments and 3 replications. The treatments were 4 bokashi dosage (0, 5, 10 and 15 ton ha-1) combined with 4 varieties of F1 sweet corn (Bonanza, Talenta , Secada and Sweet Boy). The data were analyzed using analysis of variance and Duncan multiple-range test at 5%. The results show that bokashi dosage had given difference on plant height, number of leaves per plant, diameter of the stem, weight of ears, number of grain rows, and yield. Dosages of 10 tons ha-1 bokashi gave the best growth and sweet corn yield of Sweet Boy F1 varieties on Integrated Crop Management System. Keywords: Sweet Corn, Bokashi, CMS. Sari. Produksi jagung manis di Indonesia dapat ditingkatkan dengan program intensifikasi, diantaranya dengan penggunaan kultivar unggul, pupuk berimbang, dan pupuk organik. Tujuan penelitian ini adalah untuk mempelajari sistem pengelolaan tanaman terpadu, yang berhubungan dengan penggunaan pupuk orga-nik bokashi yang cocok pada tanaman jagung manis, khususnya di dataran rendah Karawang. Metode penelitian ini menggunakan percobaan. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok, terdiri dari 16 perlakuan dan 3 ulangan. Perlakuan terdiri dari 4 dosis bokashi (0, 5, 10 dan 15 ton ha-1)  yang dikombinasikan dengan 4 varietas jagung manis F1(Bonanza, Talenta , Secada dan Sweet Boy). Data dianalisis menggunakan analisis varians dan uji jarak berganda Duncan pada taraf 5%. Hasil menunjukkan perlakuan dosis bokashi memberikan perbedaan pada tinggi tanaman, jumlah daun, diameter batang, berat tongkol, jumlah baris biji, dan hasil. Dosis bokashi 10 ton ha-1 memberikan pertumbuhan dan hasil terbaik jagung manis varietas Sweet Boy pada sistem Pengelolaan Tanaman Terpadu. Kata kunci: Jagung Manis, Bokashi, Pengelolaan Tanaman Terpadu


2020 ◽  
Vol 18 (2) ◽  
pp. 60
Author(s):  
M. SYAKIR ◽  
GUSMAINI GUSMAINI

<p>ABSTRAK<br />Tanaman nilam (Pogostemon cablin Benth) sudah lama dibudi-<br />dayakan, namun produktivitas dan mutu minyak yang dihasilkan masih<br />rendah. Rendahnya produktivitas dan mutu minyak tersebut antara lain<br />disebabkan teknologi budidaya yang masih sederhana, dan berkembangnya<br />penyakit, seperti penyakit layu bakteri dan budog, serta hama yang<br />disebabkan oleh nematoda. Penelitian ini bertujuan untuk memperoleh<br />sumber dan dosis kalium yang tepat dalam meningkatkan pertumbuhan<br />dan produksi tanaman nilam. Kegiatan ini merupakan penelitian lapang<br />yang dilakukan di Kuningan, Jawa Barat, dari bulan Januari sampai<br />Desember 2009. Percobaan disusun menggunakan rancangan acak<br />kelompok lengkap, 9 perlakuan dengan 3 ulangan. Perlakuan terdiri atas<br />1) kontrol, 2) dosis KCl 60 kg/ha, 3) dosis KCl 120 kg/ha, 4) dosis KCl<br />180 kg/ha, 5) dosis KCl 240 kg/ha, 6) dosis K 2 SO 4 60 kg/ha, 7) dosis<br />K 2 SO 4 120 kg/ha, 8) dosis K 2 SO 4 180 kg/ha, 9) dosis K 2 SO 4 240 kg/ha.<br />Hasil penelitian menunjukkan bahwa sumber dan dosis kalium secara<br />nyata meningkatkan pertumbuhan dan produksi dibandingkan dengan<br />kontrol. Pertumbuhan tanaman, produksi terna kering, kadar dan produksi<br />minyak nilam terbaik ditunjukkan oleh perlakuan KCl atau K 2 SO 4 dengan<br />dosis 60 kg/ha. Serapan hara N dan P yang tertinggi ditunjukkan oleh<br />perlakuan pemberian 60 kg K 2 SO 4 /ha dan serapan hara K tertinggi pada<br />perlakuan 120 kg KCl/ha.<br />Kata kunci : Pogostemon cablin Benth, kalium, sumber, dosis, produksi,<br />patchouli alkohol</p><p>ABSTRACT<br />Effect of potassium sources on application yield and<br />quality of patchouli<br />Patchouli (Pogostemon cablin Benth) is an aromatic plant that has<br />long been cultivated in Indonesia, however its productivity and quality are<br />still low due to simple cultivation technology, and the development of<br />diseases, such as bacterial wilt disease, budog, and pests caused by<br />nematodes. This study aimed at obtaining sources and dosage of potassium<br />fertilizers to increase plant growth and oil yield of patchouli. The research<br />was conducted in Kuningan, West Java, from May to December 2009 and<br />was arranged using randomized block design, with 9 treatments and 3<br />replicates. There were 9 treatments consisting of : 1) control, 2) 60 kg<br />KCl/ha, 3) 120 kg KCl/ha, 4) 180 kg KCl/ha, 5) 240 kg KCl/ha, 6) 60 kg<br />K 2 SO 4 /ha, 7) 120 kg K 2 SO 4 /ha, 8) 180 kg K 2 SO 4 /ha, and 9) 240 kg<br />K 2 SO 4 /ha. The research results showed that the sources and dosage of<br />potassium fertilizers significantly affected growth, fresh herbal yield and<br />patchouli oil. The best plant growth, dry herbage yield, content and yield<br />of patchouli oil were obtained from the treatment of 60 kg/ha of KCl or<br />K 2 SO 4 . The highest N and P uptakes were shown by 60 kg K 2 SO 4 /ha<br />treatment and the highest K nutrient uptake was shown by 120 kg KCl/ha.<br />Key words : Pogostemon cablin Benth, potassium, source, dosage, yield,<br />patchouli olcohol</p>


2018 ◽  
Vol 30 (1) ◽  
pp. 75 ◽  
Author(s):  
Gul B. Poussio ◽  
Manzoor A. Abro ◽  
Jamal U. D. Hajano ◽  
Muhammad I. Khaskheli ◽  
Khalid I. Rajput ◽  
...  

Fusarium oxysporum f.sp. lycopersici (FOL) is a highly destructive fungal pathogen of tomato crop causing wilt disease which may reduce 10 to 90% yield. In Pakistan, tomato is widely grown in Sindh province, major territories are district Hyderabad, Tando Allahyar and Mirpurkhas. Thus, surveys of these territories were conducted to record intensity of the disease and confirm etiology. Furthermore, potential of different botanical pesticides and commercially available fungicides were tested to inhibit mycelial growth of the causal fungus. The experiment was laid down with complete randomized block design with three replications. The results showed that the disease was occurring in all locations with the range of 8-47 % incidence. F. oxysporum f.sp. lycopersici was predominantly isolated from the collected disease sample during survey and pathogenic nature of the fungus was tested on the tomato Golo variety through soil drenching method. The disease incidence of 30 and 42 % (72 % as total) was recorded in inoculated tomato plants at 20 and 40 DAI, respectively. Maximum (67 %) inhibition of the fungal growth was found by neem seed extracts at higher dose of 8 % concentration followed by 63 % with neem seeds and Eucalyptus at 6 and 8 %, respectively. Alternatively, the Nativo 75 WG fungicide was found most effective in reducing the redial mycelial growth of target fungus followed by Topsin-M at 1000 ppm where as Aliette and Melodedue fungicides were found least effective under in-vitro conditions.


2020 ◽  
Vol 4 (1) ◽  
pp. 91-99
Author(s):  
Multazam Palepi ◽  
Jumini Jumini ◽  
Syaffrudin Syaffrudin ◽  
Syaffrudin Syaffrudin

Abstrak.  Penelitian ini bertujuan untuk mengetahui pengaruh jenis mikoriza dan populasi tanaman terhadap pertumbuhan dan hasil jagung manis, serta interaksi antara jenis mikoriza dengan populasi tanaman terhadap pertumbuhan dan hasil jagung manis. Penelitian ini dilaksanakan pada bulan November 2017 sampai Januari 2018 di Desa Blang Krueng, Kecamatan Baitussalam, Kabupaten Aceh Besar. Rancangan Penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK) pola faktorial 3 x 2 dengan  3 ulangan. Faktor yang diteliti yaitu jenis mikoriza dan populasi tanaman. Faktor jenis mikoirza terdiri dari 3 taraf yaitu ; mikoriza glomus mosseae, gigaspora dan campuran. Faktor populasi tanman terdiri atas 2 taraf yaitu : satu benih dan dua benih. Hasil penelitian menunjukkan penggunaan jenis mikoriza campuran secara umum menghasilkan pertumbuhan dan  hasil  tanaman jagung yang lebih baik. Sedangkan populasi tamanan yang terbaik adalah satu tamanan. Selanjutnya Interaksi yang lebih baik terdapat  pada jenis mikoriza campuran dengan  populasi tamanan pada parameter diameter batang 15 HST dan 30 HST, berat basah akar dan berat buah berkelobot, diameter tongkol,berat buah tampa kelobot dan potensi hasil per hektar. The effect of Mycoriza Types and Number of Crop Populations on Growth and Yield of Sweet CornAbstractThis research purposes to know the effect of mycoriza types and the population of  the plants toward the growth and yield of sweet corn and the interaction between mycoriza types and the population of  the plants to the growth and yield of sweet corn. This research was carried out in November 2017 until Januari 2018 at Blang Krueng village, Baitussalam sub-district, Aceh Besar Regency and Physiology Laboratory, faculty of Agriculture, Syiah Kuala University. This research was conducted Randomized Block Design factorial pattern 3 x 2 with 3 replications. The factors studied in this research are mycoriza types and the population of  the plants. 3 types of mycoriza types are glomus mosseae mycoriza, gigaspora and the mixture of glomus mosseae and gigaspora. and 2 types of the population of  the plants are using one seed and two seed. The result of this research pointed out that the using of the mixture mycoriza type generally increased the growth and yield of sweet corn.  Whereas, the using of the population  of  the plants with one seed had showed the best result. And the better interaction is obtained in the mixture mycoriza with the population of  the plants in there after a good interaction is present in mixed mycorrhizae species with plan population on the diameter of tehstem 15 HST and 30 HST, the weight of the root base and the weight of the weighted fruit, the diameter of the cob weight of the without any weight fruit and the potential yield per hactare.


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