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

ABSTRACTCurvularia sp. a new fungal pathogen causing leaf spot on the leaf of mustard greenA new diseases symptom as small spots of 1.5 - 1 mm diameter has been found on mustard green's leaf of farmer's field at Tanjungsari Regency of Sumedang. This symptom is different from those previously known incited by Alternaria brassicae and A. brassicola, Pseudocercosporella capsellae as well as by Myscosphaerella brassicicola. Although the spots are small, they are abundant and accompanied with yellowing, making these symptoms detrimental to mustard green production which has to be green and healthy. A Koch Postulate has been performed and successfully identified that the fungal causal agent was of the genera of Curvularia. Previously, curvularia leaf spot disease has never been reported on mustard green in Indonesia.Keywords: Curvularia, Leaf spots, Mustard green, Brassica junceaABSTRAKGejala penyakit baru, berupa bercak hitam berukuran diameter 0,5 - 1 mm ditemukan pada daun tanaman sawi milik petani di daerah Tanjungsari Kabupaten Sumedang. Gejala demikian berbeda dengan gejala-gejala penyakit bercak yang selama ini dikenal disebabkan oleh Alternaria brassicae dan A. brassicola, Pseudocercosporella capsellae dan Myscosphaerella brassicicola. Walaupun gejalanya berukuran kecil, namun karena jumlahnya banyak dan menyebabkan daun menguning, menjadikan gejala penyakit ini merugikan tanaman sawi yang harus hijau dan sehat. Uji Postulat Koch telah dilaksanakan, dan berhasil mengidentifikasi bahwa berdasarkan morfologi mikroskopiknya, jamur tersebut adalah dari genus Curvularia. Penyakit bercak daun curvularia, sebelumnya, belum pernah dilaporkan terdapat pada tanaman sawi di Indonesia.Kata Kunci: Curvularia, Bercak daun, Sawi, Brassica juncea

Download Full-text

Curvularia sp. Jamur Patogen Baru Penyebab Penyakit Bercak Daun pada Tanaman Sawi

Agrikultura ◽

10.24198/agrikultura.v29i3.22716 ◽

2019 ◽

Vol 29 (3) ◽

pp. 119

Author(s):

Tarkus Suganda ◽

Dinda Y Wulandari

Keyword(s):

Brassica Juncea ◽

Leaf Spot ◽

Fungal Pathogen ◽

Causal Agent ◽

Leaf Spot Disease ◽

Alternaria Brassicae ◽

Spot Disease ◽

Leaf Spots ◽

Green Production ◽

Mustard Green

ABSTRACTCurvularia sp. a new fungal pathogen causing leaf spot on the leaf of mustard greenA new diseases symptom as small spots of 1.5 - 1 mm diameter has been found on mustard green's leaf of farmer's field at Tanjungsari Regency of Sumedang. This symptom is different from those previously known incited by Alternaria brassicae and A. brassicola, Pseudocercosporella capsellae as well as by Myscosphaerella brassicicola. Although the spots are small, they are abundant and accompanied with yellowing, making these symptoms detrimental to mustard green production which has to be green and healthy. A Koch Postulate has been performed and successfully identified that the fungal causal agent was of the genera of Curvularia. Previously, curvularia leaf spot disease has never been reported on mustard green in Indonesia.Keywords: Curvularia, Leaf spots, Mustard green, Brassica junceaABSTRAKGejala penyakit baru, berupa bercak hitam berukuran diameter 0,5 - 1 mm ditemukan pada daun tanaman sawi milik petani di daerah Tanjungsari Kabupaten Sumedang. Gejala demikian berbeda dengan gejala-gejala penyakit bercak yang selama ini dikenal disebabkan oleh Alternaria brassicae dan A. brassicola, Pseudocercosporella capsellae dan Myscosphaerella brassicicola. Walaupun gejalanya berukuran kecil, namun karena jumlahnya banyak dan menyebabkan daun menguning, menjadikan gejala penyakit ini merugikan tanaman sawi yang harus hijau dan sehat. Uji Postulat Koch telah dilaksanakan, dan berhasil mengidentifikasi bahwa berdasarkan morfologi mikroskopiknya, jamur tersebut adalah dari genus Curvularia. Penyakit bercak daun curvularia, sebelumnya, belum pernah dilaporkan terdapat pada tanaman sawi di Indonesia.Kata Kunci: Curvularia, Bercak daun, Sawi, Brassica juncea

Download Full-text

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

Jurnal Ilmiah Universitas Batanghari Jambi ◽

10.33087/jiubj.v21i3.1761 ◽

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%.

Download Full-text

TWO NEW SEVERE LEAF SPOT DISEASE ON FOREST TREES OF JALGAON (MAHARASTRA) INDIA

FLORA AND FAUNA ◽

10.33451/florafauna.v23i2pp288-290 ◽

2017 ◽

Vol 23 (2) ◽

Author(s):

S. A. FIRDOUSI

Keyword(s):

Leaf Spot ◽

Fungal Disease ◽

Leaf Spot Disease ◽

Forest Trees ◽

First Report ◽

Spot Disease ◽

Severe Leaf

During the survey of the forest fungal disease, of Jalgaon district, two severe leaf spot diseases on Lannae coromandelica and ( Ougenia dalbergioides (Papilionaceae) were observed in Jalgaon, forest during July to September 2016-17. The casual organism was identified as Stigmina lanneae and Phomopsis sp. respectively1-4,7. These are first report from Jalgaon and Maharashtra state.

Download Full-text