scholarly journals Evaluation of yield and pest and disease resistance of cocoa clones in Kolaka District, Southeast Sulawesi, Indonesia

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
Rubiyo Rubiyo ◽  
Yovita anggita Dewi ◽  
CHANDRA INDRAWANTO ◽  
IMRAN IMRAN ◽  
AGUS SALIM ◽  
...  

Abstract. Rubiyo, Dewi YA, Imran, Salim A, Baharudin, Indrawanto C, Ratule MT. 2020. Evaluation of yield and pest and disease resistance of cocoa clones in Kolaka District, Southeast Sulawesi, Indonesia. Biodiversitas 21: 5698-5607. Cocoa is one of the main plantation commodities in Indonesia. It is an important source of foreign exchange and employment. Currently, Indonesian cocoa production and productivity, including in Southeast Sulawesi, are declining due to pests and diseases. In addition, there is a lack of high-quality and high-yielding clones. This study aimed to evaluate the quality of cocoa clones and resistance to cocoa pod borer (CPB) and cocoa pod rot (CPR) disease caused by the fungus Phytophthora palmivora. The study tested 12 cocoa clones, which included four high-yielding clones. The research location was in Lambandia Subdistrict, Kolaka District, Southeast Sulawesi Province, Indonesia. Clonal planting material was propagated by grafting in 2010. The study used a randomized block design and the treatments consisted of 20 plants of each cocoa clone with three replications. The clones were evaluated from 2018 to 2019. The observed variables included resistance to CPB and CPR. The results of the study based on the quality component showed that the clones MT, M04, and M01 had the highest average weight per one dry bean of 1.55 g, 1.64 g, and 1.24 g, respectively. Beans produced by clones MT, M01, and M04 had an average fat content of 53.36%, 52.72%, and 50.76%, respectively. Observations of the average number of pods with CPR showed that the lowest rate of attack (about 6%) was in BAL 209 and PT. Ladongi clones, with attack intensities of 20% and 18%, respectively; therefore, these clones were classified as resistant to CPR. Evaluation of the level of resistance to attack by CPB pests found two resistant clones, PT. Ladongi and Sulawesi 2, with light levels of attack on beans.

Author(s):  
Indah Anitasari ◽  
Bayu Setyawan ◽  
Agung Wahyu Soesilo

The intensity of vascular streak dieback (VSD) disease is one of the major causes of decreased fine flavor cocoa production in Indonesia; therefore, it is essentialto develop superior planting materials resistant to this disease. The purpose of the study was to conduct initial identification of yield potential and resistancelevel to VSD disease in several promising clones of fine flavor cocoa and to identify bean quality profile. This study was conducted at Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institute, Jember, Indonesia, with an altitude of 45 m above sea level (asl.) and C climate type, according to the Schmidt-Ferguson classification system. The study design used a complete randomized block design consisting of 13 promising clones and 3 superior clones of fine flavor cocoa as control. Each treatment was repeated 4 times in blocks, and each plot consisted of 5 plants. The results showed that PNT 16 was potential to be developed as a superior promising clone of fine flavor cocoa with high yield potential (66.6 pods/ tree/year equal to 2.52 kg dry bean/tree/year) and low VSD level (VSD score: 0.4) in first year of production (4 years old after planting). The superior promising clone of PNT 16 comprises of 35.1 beans per pod with good quality, weighed by 1.25 g/bean, and a higher percentage of white seeds above 80% (94.9%). Furthermore, the specifications of the main flavor attributes are similar to ICCRI 09 and dominated by the browned roasted, nutty and browned fruit aroma. Therefore, the clone has the potential to be developed as one of the special cocoa products. 


2016 ◽  
Vol 22 (4) ◽  
pp. 349
Author(s):  
Sartono Putrasamedja ◽  
Wiwin Setiawati ◽  
L Lukman ◽  
Ahsol Hasyim

<p>Perkembangan varietas-varietas bawang merah di suatu daerah ditentukan oleh keserasian dengan lingkungan, potensi hasil, toleransi terhadap serangan organisme pengganggu tumbuhan (OPT), serta umur dan mutu hasil. Penelitian bertujuan untuk menguji penampilan beberapa klon bawang merah dan hubungannya dengan intensitas serangan OPT penting. Penelitian dilaksanakan di Brebes dan Tegal (Jawa Tengah) dari Bulan Juni sampai dengan September 2011. Perlakuan yang diuji ialah 10 klon bawang merah hasil silangan tahun 2004 dan 2005, serta dua varietas bawang merah sebagai pembanding (Bauji dan Bima Brebes). Rancangan percobaan yang digunakan ialah acak kelompok dan diulang tiga kali. Parameter yang diamati ialah pertumbuhan tanaman (tinggi tanaman, jumlah daun, dan jumlah anakan), hasil panen, dan serangan OPT penting. Hasil penelitian menunjukkan bahwa klon no. 2005/1 dapat beradaptasi dengan baik di Brebes dan Tegal, mampu menghasilkan produksi tertinggi masing-masing sebesar 9,95 dan 17,50 t/ha, mempunyai diameter umbi terbesar (1,87 dan 2,41 cm), bentuk umbi bulat, dan berwarna merah tua, sedangkan klon no. 2004/11 mempunyai pertumbuhan dan  produktivitas yang tinggi, relatif toleran terhadap serangan Spodoptera exigua, Alternaria porri, dan Colletotrichum gloeosporioides, diameter umbi (1,67 dan 1,96 cm), bentuk umbi bulat,  dan berwarna merah tua, sedangkan klon no. 2004/10 dan no. 2005/19 sangat rentan terhadap serangan hama S. exigua, penyakit A. porri, dan C. gloeosporioides. Klon-klon yang mempunyai tingkat serangan rendah/toleran terhadap OPT merupakan klon harapan bawang merah toleran/tahan OPT. Namun demikian, penggunaan pestisida sesuai dengan konsep pengendalian hama terpadu (PHT) masih tetap diperlukan terutama apabila serangan OPT tersebut mencapai ambang pengendalian yang ditetapkan.</p><p> </p><p>The development of shallots varieties in one location depends on the genetic adaptability, yield potential,  tolerance to pest and diseases, harvest date, yield and quality. The aim of study was to evaluate 10 clones and two local clones as check, Bima Brebes and Bauji were conducted in Brebes and Tegal (Central Java) from June to September 2011. The trial were laid out in a completely randomized block design and each treatment was replicated three times. The parameters used for evaluating these clones were plant height, no. of sprout,  no. of leaves, yield and pests and diseases incidence. The results showed that considering overall performance, clone no. 2005/1 gave the highest yield (9.95 and 17.50 t/ha), and diameter of bulb (1.87 and 2.41 cm) in Brebes and Tegal respectively, clone no. 2004/11 produced growth and good yield  and showed tolerance to Spodoptera exigua, Alternaria porri, and Colletotrichum gloeosporioides, bulb diameter (1.67 and 1.96 cm) with dark red color,  while clone no. 2004/10 and no. 2005/19 were identified as the most susceptible clones to S. exigua, A. porri, and C. gloeosporioides. This suggests that some of shallots clones could be good candidates for the new varieties of shallots. However, the use of pesticides in IPM concept were still needed especially if the incidence of pests and diseases reach the action threshold.</p>


2020 ◽  
Vol 9 (2) ◽  
pp. 15-21
Author(s):  
Ni'matuljannah Akhsan

ABSTRACT The aim of this research is to control environmentally friendly soybean pod borer by utilizing plants in swamps as a vegetable insecticide, namely Kepayang (Pangiumedule). The study was conducted on tidal land in the Village of Kiri Dalam, Barambai District, Barito Kuala Regency, South Kalimantan Province. The study was designed in a randomized block design with 5 replications. The treatment is; 1. Kepayang leaf extract, 2. Without control, 3.Neem plant extract, 4. Chloriliprol insecticide. The results showed that the Kepayang leaf extract can be used as a botanical insecticide controlling soybean pod borer because it can suppress soybean pod attack by up to 62% and is no different from the Chloriliprol insecticide treatment by 64%. Keywords: Applications, Swamp Plants, Boring Pods Borers, Tidal Swamps


Author(s):  
Sagar Anand Pandey ◽  
S. B. Das

A field experiment on evaluation of biopesticides against gram pod borer (Helicoverpa armigera Hub.) on pigeon pea was carried out during kharif season of 2012-13. The experiment was laid out in randomized block design with three replications. Gram pod borer is a major pest of pigeon pea in India. For the management of this pest seven biopesticides were tested along with control. Among the biopesticides, Beauveria bassiana @ 1 liter / ha (1x1012 spores/ml) was found to be most effective biopesticide as it recorded lowest larval population (6.68 larvae / 5plants). The highest larval population was recorded in control (12.61 larvae /5 plants). The least effective treatment was Paecilomyces fumosoreseus (9.31 larvae /5 plants). Similar trend was observed in the grain yield as 1667.55 kg/ha, 709.41kg/ha and 1025.21kg/ha , respectively.


2016 ◽  
Vol 46 (10) ◽  
pp. 1858-1864
Author(s):  
Aiane Aparecida da Silva Catalan ◽  
Everton Luis Krabbe ◽  
Valdir Silveira de Avila ◽  
Letícia dos Santos Lopes ◽  
Ana Paula Nunes ◽  
...  

ABSTRACT: In order to evaluate the efficiency of phytase in diets with low and high phytate phosphorus (PP) 0content, as a consequence of wheat bran inclusion, on the relative weight of organs, intestinal morphometry and performance, three hundred and eighty-four male Cobb500 broilers were housed in metabolic cages. Animals were assigned into four treatments in a 2x2 factorial scheme in a randomized block design with eight replicates of 12 birds each. From 11 days of age birds received experimental diets, which consisted of: Diet low in PP; Diet low in PP with phytase (500FTU kg-1); Diet with a high PP and Diet with a high PP with phytase (500FTU kg-1). At 22 and 32 days of age two birds were slaughtered in order to collect gizzard, heart, liver, cecum, cloacal bursa, and at 32 days, a portion of the duodenum, jejunum and ileum was collected for morphometric evaluation. From 22 to 32 days of age average feed intake, average weight gain, average body weight and feed conversion ratio were also evaluated. Data were subjected to analysis of variance, fixed effects of diet and phytase and interaction between factors as well as the random block effects were tested. There was no significant interaction for the variables studied, concluding that phytase in diets with low or high phytate phosphorus content did not change the relative weight of organs, intestinal morphometrics and performance; only isolated effects were observed.


2021 ◽  
Vol 22 (1) ◽  
pp. 8
Author(s):  
Marida Santi Yudha Ika Bayu ◽  
Yusmani Prayogo ◽  
Gatut Wahyu Anggoro Susanto

The main constraints to increase mungbean production in Indonesia are pests and diseases. The application of integrated biological agents can improve the efficacy of controlling the mungbean pests and diseases. The study aimed to determine the efficacy of integrated biological agents to suppress mungbean pests and diseases. This field research was conducted from May to July 2018 using a randomized block design with seven treatments and four replicates. The treatments were: T1 = Trichol + NSP, T2 = Trichol + SlNPV, T3 = Trichol + NSP + SlNPV, T4 = Trichol + NSP + SlNPV + BeBas, T5 = Trichol + NSP + SlNPV + BeBas + GE, T6 = chemical pesticides, and T7 = control. The results showed that the highest efficacy occurred in T4 and T5 treatments which saved the yield loss from major pests and diseases attack, and did not differ significantly with chemical pesticides (T6). Treatments T4 was able to reduce the development of soil borne diseases by 3% and suppress Spodoptera litura attack by 9.8% as compared to chemical treatment. T4 was also more efficient than T5 because it uses less biological agents. The advantage of biological agents is compatible if they were used together with predators such as Oxyopes sp., Paederus sp. and Coccinella sp; and also Telenomus sp. and Trichogramma sp. parasitoids. On the other hand, the chemical pesticides (T6) killed all existing natural enemies. Therefore, T4 could be recommended for controlling mungbean pests and diseases.


2019 ◽  
Vol 5 (1) ◽  
pp. 11
Author(s):  
Galvani Asep Santoni ◽  
Iin Arsensi ◽  
Mahdalena Mahdalena

Row spacing treatment had no significant effect on all parameters pengamatan.Pada age of 90 days after planting the average weight of the fresh fruit crop was obtained in treatment j2 highest ie 83.30 g, while the average weight of the fresh fruit crop obtained at the lowest possible j3 treatment of 75 , 49 g.Perlakuan extract of petals gods were not significantly affected all parameters pengamatan.Pada age of 90 days after planting the average weight of the fresh fruit crop was obtained in treatment d1 highest ie 83.98 g, while the average weight of the fresh fruit crop lowest was obtained in treatment that is 77.52 g.Interaksi d0 between the treatment plant spacing and crown god leaf extract had no significant effect on all parameters of observation. At the age of 90 days after planting the average percentage of disease were highest in j2d2 treatment combination that is 65.64% while the average percentage of the lowest in disease treatment combination j2d0 yaitu 51.72%. This research was conducted by randomized block design factorial 4 x 3 with three replications. The first factor is a spacing (A) which consists of three levels ie; j1 (60 x 60 cm), j2 (60 x 70 cm) and j3 (60 x 80 cm). The second factor is the extract of leaves of the gods crown (D), which consists of four levels ie; d0 (control), d1 (2 ml / liter of water), d2 (4 ml / liter of water) and d3 (6 ml / liter of water).


2016 ◽  
Vol 83 (2) ◽  
Author(s):  
Abdul WAHAB ◽  
Muhammad TAUFIK ◽  
La Ode Santiaji BANDE ◽  
Irma KRESNAWATY

AbstractVarious factors causing the decreasing in the cocoa  production, and one of them is the infection of cocoa pod disease (CPD) caused by the pathogen of  Phytophthora palmivora. Plastic covered and coating with biokaolin can be used as techniques for the prevention of the diseases. The aim of  the research was to evaluate several techniques to control cocoa pod disease in order to reduce disease incidence, disease severity and yield loss of 100 seeds cocoa. This research was conducted in the village of Tokai, District of Poli-Polia, East Kolaka Southeast Sulawesi, from April to August 2013. The research was conducted according completely Randomized Block Design (RBD) with five treatments and four groups in order to obtain 20 experimental units. Each experimental unit consisted of  20 trees which each has five fruits so in total each unit consist of 100 fruit samples. The treatments tested were as follows; control (M0), biokaolin application every two weeks (M1), biokaolin application every four weeks (M2), plastic covered (M3), and mankozeb fungicide application every two weeks (M4). Variables observed in this study were the incidence of disease, severity of disease and yield loss was calculated by weighing the dry weight of 100 seeds. The results showed that the application of biokaolin every two weeks was more  effective to reduce disease incidence (26.12%) and disease severity (11.04%) while the average weight of the highest dry bean yield loss was on category of severe infection that is 74.96% with the lowest dry weight is 26.6 g in 100 seeds.  Abstrak   Berbagai faktor menjadi penyebab turunnya produksi buah kakao, salah satunya adanya infeksi penyakit busuk buah kakao (BBK) yang disebabkan oleh pathogen  Phytophthora palmivora. Teknik yang dapat dikembangkan untuk penanggulangan penyakit antara lain teknik penyelubungan dan pelapisan dengan biokaolin. Penelitian ini  ber-tujuan untuk mengevaluasi berbagai teknik pengendalian penyakit busuk buah kakao yang efektif menekan kejadian penyakit, keparahan penyakit dan besarnya kehilangan hasil berat 100 biji kering. Penelitian dilaksanakan di Desa Tokai, Kecamatan Poli-Polia, Kabupaten Kolaka Timur, Sulawesi Tenggara pada bulan April sampai Agustus 2013. Metode yang digunakan berdasar-kan Rancangan Acak Kelompok (RAK) dengan lima perlakuan dalam empat kelompok sehingga diperoleh 20 unit percobaan.  Setiap unit percobaan terdiri dari 20 pohon, dalam satu pohon terdiri dari lima sampel sehingga dalam 1 unit terdiri dari 100 sampel.  Perlakuan yang dicobakan adalah sebagai berikut; tanpa penyemprotan/penyelubungan (kontrol)  (M0), penyemprotan dengan biokaolin setiap dua minggu (M1), penyemprotan dengan biokaolin setiap empat minggu (M2), penyelubung-an dengan kantong plastik (M3), penyemprotan dengan fungisida mankozeb setiap dua minggu (M4). Parameter yang diamati  adalah kejadian penyakit, keparahan penyakit dan besarnya kehilangan hasil dihitung dengan menimbang berat 100 biji kering. Hasil penelitian menunjukkan bahwa teknik pengendalian penyakit busuk buah dengan aplikasi biokaolin setiap dua minggu rata-rata lebih efektif dalam menekan kejadian   penyakit yaitu (26,12%)  dan  keparahan  penyakit  (11,04%), sedangkan rata-rata besarnya kehilanganhasil berat biji kering tertinggi terlihat pada kategori infeksi berat yaitu 74,96%  dengan berat kering terendah yaitu 26,6 g dalam100 biji.


Author(s):  
E. Triharyanto ◽  
D. Purnomo ◽  
A. Yunus ◽  
Samanhudi .

Background: Problems shallot cultivation in tropical regions such as Indonesia, is low productivity. Planting material is one of the causes of low productivity. The planting material used is a bulb that has been used continuously. It is makes planting material susceptible to infectious diseases and viruses. Efforts can be made to reducing the attack of virus infections in the planting material of the bulbs is by using seeds. However, seed production in Indonesia is still low due to the difficulty of flowering and low viability of seeds. The aim of this research was to detect flowering ability from the source of bulbs flowering and non-flowering clumps using Hd3a primers and endogenous GA3, also the effect of age of bulbs to flowering of shallot. Methods: The study used a complete randomized block design. The treatment consisted of two factors with three replications. The first factor was source of bulbs flowering and non-flowering clumps. The second factor was age bulbs which consists of three levels, namely the 60, 80 and 90 days age bulbs. The contents of gibberellins was analyzed using HPLC analysis. Molecular analysis to determine the potential of flowering genes used SSR primer (Hd3a). Result: Hd3a primer can be used as a marker of flowering shallot. Source of bulbs flowering and non-flowering clumps have the same flowering potential gene. The percentage of flowering in flowering clumps was higher than non-flowering clumps and correlates with endogenous gibberellins content. The age of bulbs indicates that older bulbs gave a higher percentage of flowering.


2016 ◽  
Vol 21 (2) ◽  
pp. 61 ◽  
Author(s):  
Yusuf Limbongan ◽  
Fadjry Djufry

<p>Local rice of Toraja Plateau, such as Pare Bau&amp;amp;rsquo;, Pare Kombong, Pare Lallodo, Pare Ambo&amp;amp;rsquo;, and Pare Lea, is one source of organic food which may improve national food security in the future. In order to determine the character and superiority of these five accsessions, characterization, and observation had been conducted in North Toraja and Tana Toraja district in 2011&amp;amp;ndash;2013. Observation was carried out on five genotypes of local superior rice and one genotype as check variety (Cisantana variety). The experiment used randomized block design that was repeated five times, therefore 30 plots were observed. The parameters of observations consist of the growth components, yield components, productivity, nutrient content, flavor and aroma, and resistance to pests and diseases. The results showed that the five accessions have morphological difference, sharp and distinctive aroma, delicious/fluffier taste, resistance to pest, good adaptability to the plateau (700&amp;amp;ndash;2.000 m above sea level), high protein content, low fiber and glucose content, high vitamin B content, and delicious rice. Heritability values for all components of quantitative trait were ranged from moderate to high.</p><p><strong>Abstrak</strong></p><p>Padi lokal dataran tinggi di Tana Toraja, antara lain Pare Bau&amp;rsquo;, Pare Kombong, Pare Lallodo, Pare Ambo&amp;rsquo;, dan Pare Lea, merupakan salah satu sumber pangan organik dalam rangka meningkatkan ketahanan pangan nasional pada masa yang akan datang. Untuk mengetahui karakter dan keunggulannya, telah dilakukan karakterisasi dan observasi kelima aksesi tersebut di Kabupaten Toraja Utara dan Tana Toraja tahun 2011&amp;ndash;2013. Observasi dilakukan terhadap lima genotipe padi unggul lokal serta satu genotipe pembanding, yaitu varietas Cisantana. Penelitian menggunakan Rancangan Acak Kelompok yang diulang 5 kali sehingga terdapat 30 petak observasi. Pengamatan dilakukan pada komponen pertumbuhan, komponen hasil, produktivitas, kandungan gizi, rasa, dan aroma, ketahanan terhadap hama dan penyakit. Hasil penelitian menunjukkan bahwa kelima aksesi berbeda secara morfologi, memiliki aroma yang tajam dan khas, rasa nasi yang enak/pulen, tahan terhadap OPT, daya adaptasinya baik pada dataran tinggi (700&amp;ndash;2.000 m dpl), kandungan protein tinggi, kandungan serat dan glukosa rendah, kandungan vitamin B tinggi, dan rasa nasi enak/enak sekali. Nilai heritabilitas untuk semua komponen kuantitatif berkisar antara kriteria sedang sampai tinggi.</p>


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