scholarly journals Intensitas dan Persentase Serangan Beberapa Penyakit Utama Pada Tanaman Sawit (Elaeis guineensis Jacq.) di Desa Tebing Tinggi Kecamatan Mara Sebo Ulu Kabupaten Batanghari

2021 ◽  
Vol 21 (3) ◽  
pp. 1399
Author(s):  
Yuza Defitri
Keyword(s):  
Oil Palm ◽  
Leaf Spot ◽  
Random Sampling ◽  
Elaeis Guineensis ◽  
Survey Method ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Fusarium Sp ◽  
Elaeis Guineensis Jacq ◽  
Disease Attack

This research was carried out in smallholder oil palm plantations in Tebing Tinggi Village, Mara Sebo District, Batanghari Regency from March to June 2021. The purpose of the study was to observe the diseases that exist in oil palm plantations, the percentage and intensity of the disease attacks. This study used a survey method with random sampling at 3 locations of smallholder plantations in Tebing Tinggi village, namely 20 sample plants from each garden. Observe all plants and count how many are symptomatic of the disease. Then calculated the percentage and intensity of disease attacks. Samples of diseased plants were taken and wrapped in damp newspapers for identification at the Unbari Basic Laboratory. The results showed that in Tebing Tinggi village, Mara Sebo Ulu district, the highest percentage of Curvularia leaf spot disease caused by the fungus Curvularia sp was found in P2 area at 40%, Drechslera leaf spot disease attack caused by Drechslera sp fungus was highest in P2 land. by 35%, and the highest attack of crown disease (Crown Disease) caused by the fungus Fusarium sp. was found in P3 land by 20%. The intensity of disease attacks found in Tebing Tinggi Village, namely, the intensity of the attack of Curvularia Leaf Spot disease caused by the fungus Curvularia sp in Tebing Tinggi village was 28.75%, the intensity of Drecshlera Leaf Spot disease caused by Drechslera sp fungus was 26.25% and Crown disease crown disease is 6.6%.

scholarly journals Screening of oil palm (Elaeis guineensis Jacq.) varieties for resistance to Curvularia leaf spot disease

2019 ◽  
Vol 13 ((04) 2019) ◽  
pp. 507-512
Author(s):  
Jittra Kittimorakul ◽  
Anurag Sunpapao ◽  
Saowapa Duangpan ◽  
Jakarat Anothai ◽  
Theera Eksomtramage
Keyword(s):  
High Resistance ◽  
Oil Palm ◽  
Leaf Spot ◽  
Elaeis Guineensis ◽  
Disease Incidence ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Resistant Varieties ◽  
Significant Difference ◽  
Hybrid Lines

Leaf spot disease, particularly Curvularia leaf spot (CLS), can devastatingly damage both quality and quantity of oil palm seedlings in Thailand. Chemical fungicides have been intensively applied to control transmission of this disease. However, this has relatively low efficiency as the causative pathogen gains resistance to fungicides with selection pressure. An alternative or complementary cost-effective and environmentally friendly approach is necessary to find the resistant varieties for disease management. In this present study, a total of 122 lines of Dura female plant, 2 lines of Pisifera male plant, and 4 Tenera commercial varieties (A, B, C and SUP-PSU1) were screened by Curvularia inoculation using detached leaf method. Two weeks after inoculation, the results showed 13 Dura lines as highly resistant to CLS (0% disease incidence), whereas one line (129) and the commercial variety B were highly susceptible (100% disease incidence). Nine Tenera hybrid lines from 13 Dura highly resistant lines were selected to test for high resistance and subjected to Curvularia inoculation in greenhouse conditions, and compared with the susceptible and highly susceptible lines. Three Tenera hybrid lines (138, 187 and 203) showed high resistance to CLS significant difference from susceptible lines. These were the most highly resistant varieties to CLS and should be considered for breeding programs of oil palm stock among the cases tested.

Rapid Inoculation Technique and Biological Control of Leaf Spot Disease in Oil Palm

2019 ◽  
Vol 2 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Delia Agustina ◽  
◽  
Cahya Prihatna ◽  
Antonius Suwanto ◽  
◽  
...  
Keyword(s):  
Biological Control ◽  
Oil Palm ◽  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Inoculation Technique ◽  
Spot Disease

First report of leaf spot disease on oil palm caused by Pestalotiopsis theae in Thailand

2013 ◽  
Vol 79 (4) ◽  
pp. 277-279 ◽  
Author(s):  
Nakarin Suwannarach ◽  
Kanaporn Sujarit ◽  
Jaturong Kumla ◽  
Boonsom Bussaban ◽  
Saisamorn Lumyong
Keyword(s):  
Oil Palm ◽  
Leaf Spot ◽  
Leaf Spot Disease ◽  
First Report ◽  
Spot Disease

Disease Note: Identification of Curvularia oryzae as cause of leaf spot disease on oil palm seedlings in nurseries of Thailand

2014 ◽  
Vol 42 (4) ◽  
pp. 529-533 ◽  
Author(s):  
Anurag Sunpapao ◽  
Jittra Kittimorakul ◽  
Chaninun Pornsuriya
Keyword(s):  
Oil Palm ◽  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Disease Note

scholarly journals Identifikasi Jenis dan Tingkat Serangan Hama Pada Pembibitan Tanaman Kelapa Sawit (Elaeis guineensi Jacq) di PT. Sentosa Kalimantan Jaya, Kabupaten Berau Provinsi Kalimantan Timur

2019 ◽  
Vol 8 (1) ◽  
pp. 20
Author(s):  
Andi Nur Cahya ◽  
Iin Arsensi ◽  
Purwati Purwati
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Locusta Migratoria ◽  
Survey Method ◽  
Severe Attack ◽  
East Kalimantan ◽  
Elaeis Guineensis Jacq ◽  
Locusta Migratoria Manilensis ◽  
Block Frequency ◽  
Category Frequency

Identification of Types and Levels of Pests Attack on Palm Plantation Seedlings (Elaeis guineensis Jacq) at PT. Sentosa Kalimantan Jaya, Berau District East Kalimantan Province. Under the guidance of Iin Arsensi and Purwati. This study aims to determine the types of pests that attack oil palm seedlings, the frequency and intensity of oil palm pest attack on the Main Nursery stage nursery. The research was arranged in Survey method, determining 5 research plots in one block diagonally by marking on each plot with plastic marker of seeds, so obtained 15 research plots contained in 3 block that is block J, I and D. Each research plot consists of 30 Oil palm seedlings so that the number of observed 450 seeds of oil palm. The results showed that the types of pests that attack the oil palm seedlings in Main Nursery are Tungau (Tetranychus piercei), Adoretus compressus Beetle, and Locusta migratoria manilensis (Locusta migratoria manilensis); Block Frequency A pest attack in the category of minor attacks is 51.33%, 24% attack, while the intensity of pest attacks is a mild attack category; Frequency of Block I attack of pests in light attack category is 49,33%, moderate attack 37,33%, heavy attack 2%, while intensity of pest attack moderate attack category; Frequency of Block D attack of pest in light attack category is 41,3%, moderate attack 41,3%, severe attack 7,3%, while intensity of pest attack moderate attack category;

scholarly journals KAJIAN MACAM PUPUK HAYATI TERHADAP INTENSITAS PENYAKIT BERCAK DAUN Cercospora sp PADA TANAMAN JAGUNG HITAM

2020 ◽  
Vol 22 (1) ◽  
pp. 50
Author(s):  
Nining Saputri ◽  
Sartono Joko Santosa ◽  
Saiful Bahri
Keyword(s):  
Leaf Spot ◽  
Block Design ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Corn Husk ◽  
Central Java ◽  
Leaf Spots ◽  
Randomized Block Design ◽  
Disease Attack ◽  
Biological Fertilizer

This study is titled Study of Biological Fertilizers on the intensity of Leaf Spots (Cercospora sp.) On Black Corn (Black Aztec) with the aim to study the types of biological fertilizers on the intensity of Cercospora sp. which began on November 9, 2019, in Jembangan Village, Gagaksipat Village, Ngemplak District, Boyolali District, Central Java, with a height of 150m (asl). This study uses a single factor Complete Randomized Block Design (RCBD) consisting of 10 treatments and 3 replications. The data from the results of this study were analyzed with the Duncan at the 5% level. The parameters observed include: intensity of leaf spot disease, weight of cob with corn husk per plant (gram), weight of cob without corn husk per plant (gram), weight of 100 corn seeds (gram). The results showed that: (1) Symptoms of leaf spot disease appear evenly on all biological fertilizers, symptoms of disease attack began to appear at the age of 30 days after planting. (2) In the treatment of biological fertilizer Megharizo on black corn concertration 10 ml/1,2 l (B2) can reduce the intensity of leaf spot disease. (3) The application of biological fertilizer from three doses has not been able to increase the yield of black corn to the weight of corn with corn husk, weight of corn without corn husk, and weight of 100 seeds.

scholarly journals Genera Jamur Patogen dan Persentase Penyakit Bercak Daun yang ditemukan pada Pertanaman Sawi Hijau (Brassica juncea) di Desa Serang, Kecamatan Karangreja, Purbalingga

2020 ◽  
Vol 2 (3) ◽  
pp. 392
Author(s):  
Nia Sri Hartatik ◽  
Eddy Tri Sucianto ◽  
Endang Sri Purwati
Keyword(s):  
Brassica Juncea ◽  
Leaf Spot ◽  
Survey Method ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Identification Of Fungi ◽  
Micromorphological Characters ◽  
Mustard Green ◽  
Two Stages ◽  
Colony Shape

Green mustard (Brassica juncea) is an annual or horticultural plant of the Brassica genus. The purpose of this research is to knowledge the type of fungi that cause leaf spot disease on green mustard plants and to know the large percentage of leaf spot diseases caused by fungus on mustard greens in Serang Village, Karangreja District, Purbalingga. This research is used survey method by taking purposive random sampling at two different locations. The type of fungus that causes leaf spot disease on (B. juncea) mustard green can be identified by isolating the part of plants are sick then identified. Identification of fungi is doing by two stages of observation, that is observation macromorphological characters and micromorphological characters. Observation of macromorphological characters includes colony color, colony shape, the edge of colony shape and colony reverse color. Observation of the  micromorphology character includes the presence of hyphae, hyphae (insulated or non-insulated), conidia shape, conidia color, additional devices and conidiophores. The next stage to find out the type of fungus that causes leaf spot disease is Koch's Postulate.The results obtained there is one type of disease in green mustard plants. Leaf spot is one of the diseases of mustard greens caused by the fungus Alternaria sp, with a frequency of leaf spot disease as many as 196 times, and the percentage of disease of 51,30%.

scholarly journals SIFAT KIMIA TANAH DAN PRODUKTIVITAS KELAPA SAWIT (Elaeis guineensis Jacq.) PADA TINGGI MUKA AIR TANAH YANG BERBEDA DI LAHAN GAMBUT

2019 ◽  
Vol 9 (2) ◽  
pp. 27
Author(s):  
Wawan Wawan ◽  
Erlida Ariani ◽  
Heru Rahmatsyah Lubis
Keyword(s):  
Water Level ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Chemical Properties ◽  
Water Levels ◽  
Soil Chemical Properties ◽  
Organic N ◽  
Survey Method ◽  
Elaeis Guineensis Jacq ◽  
Total P

The aims of this study to be determine the soil chemical properties and productivity of oil palm (Elaeis guineensis Jacq.) at different water levels on peatlands. The research was carried out in PT. Tabung Haji Indo Plantation (PT. THIP) Indragiri Hilir and the analys of soil chemical properties were conducted at the Laboratory of Soil Science, Faculty of Agriculture, Universitas Riau, Tampan District, Pekanbaru. This research was held started July to October 2017. This research conducted used survey method. The sampling location in this research are divided into 3 strata in 3 difference blocks and 3 samples that had been determined are named: TMA1 = 20- 40 cm, TMA2 = 41-60 cm and TMA3 => 60 cm carried out experimental used completely randomized design (CRD). There are three times repeatation treatments and 27 samples units in total. The observation data that obtained are analyzed statistically using analysis of variance (ANOVA). The results of variance analysis were continued by Duncan's multiple range test at the 5% level. The parameters of observation carried out include soil chemical properties: pH, C-organic, N-total, P-total, K-total, cation exchange capacity (CEC), saturation of bases (KB) and productivity of oil palm. The results showed that peatland with a water level of > 60 cm had soil pH, organic C, N-total, P-total, K-total, and CEC was higher than the water level of 20-40 cm and 41-60 cm, while KB at a depth of 20-40 cm had a higher KB value than the water level of 41-60 cm and > 60 cm.

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