Peranan Faktor Cuaca terhadap Infeksi dan Perkembangan Penyakit Bercak Ungu pada Bawang Merah

https://doi.org/10.22146/jpti.9351

Bambang Hadisutrisno(1*), Sudarmadi Sudarmadi(2), Siti Subandiyah(3), Achmadi Priyatmojo(4)

(1) Fakultas Pertanian Universitas Gadjah Mada
(2) Fakultas Pertanian Universitas Gadjah Mada
(3) Fakultas Pertanian Universitas Gadjah Mada
(4) Fakultas Pertanian Universitas Gadjah Mada
(*) Corresponding Author

Abstract


Purple blotch disease caused by Alternaria porri (Ell.) Cif. is one of the most important diseases on shallots. The farmers have been using fungicides as a reliable control method, however, the chemical control method has to be considered for the negative effect on the environment and the danger to the other species and causes the resistance to a certain pesticide. Therefore, it is important to develop other method that is safe, effective, and efficient, like the use of climatic data to decide the control strategy.

The result of the study on ecology of purple blotch disease carried out at the experimental station in Kramat-Tegal, Kledung-Temanggung, and KP4 Kalitirto in dry and rainy season (1991/1992) suggested that climatic factors played on important role on the daily conidium dissemination of Alternaria porri and on the intensity of purple blotch disease. Daily conidium dissemination which was one of the important component in the epidemy of purple blotch disease was influenced by the temperature, relative humidity, and the wind velocity. Conidium dissemination was occurred both during the day and night and at 10.00 am-14.00 pm when the air temperature and wind velocity were high with low relative humidity, conidium dissemination was maximum. On the other hand, at 22.00 pm – 02.00 am there was minimum conidium dissemination.

The result on the effects of leaf wetness period on disease intensity suggested that high humidity was not the only factor caused disease infection but it has to be supported by the presence of thin film water on the leaf surface at least for 4 hours since the attachment of the conidia on the leaves.

Key words: purple blotch, climatic factor, Alternaria porri, shallot


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References

Anonim, 1982. Program Balai Penelitian Tanaman Pangan Lembang 1982/1983 - 1991/1992. Balittan Lembang. 39p.

Basuki, R.S. and W.G. Koster 1989. Some Preliminary Notes on The Internal and External Trade of Shallots. Internal Comon. LEHRIJATA 395 no.5, 74 p.

Gomez and Gomez, 1984. Statistical Procedures for Agriculture Research 2 ed. John Wiley & Sons, Inc.

Hadisutrisno, B. dan Triharso. 1989. Hama dan Penyakit Bawang Putih (Allium sativum L.) Teknik Pengeadalian dan Permasalahannya. Lokakarya Pemantapan Pengembangan Budidaya Bawang Putih Daerah Tingkat II Bantul, DIY, 7-8 Maret 1989. 15 p.

Hadisutrisno, B. Witjaksono, dan Achmadi Priyatmojo, 1990. Epidemi Penyakit Trotol Pada Bawang Putih: 1. Pemencaran Kondium Pada Bulan Lcmbab. Laporan DPP-Fakultas Pertanian UGM. 31p. (tidak dipublikasikan)

Jones, A.L. 1986. Role of Wet Periods in Predicting Foliar Diseases. 87-100 p. In : Leonard, KJ. and Fry (Eds.) Vol. I. MacMillan Publish. Co. New York.

Jones, H.A. and L.K. Mann. 1963. Onion and Their Allies. Leonard Hill (Books) Ltd. London. 186 p.

Kusumo, S. 1984. Effort towards Self Sufficiency in garlic. Indonesian agricultural research and development journal VI (3&4): 34-37.

Purseglove, J.W. 1972. Tropical Crops. Monocotyledons 1. Longman Group Ltd.: 534 p.

Rismunandar. 1986. Membudidayakan 5 .Tenis Bawang. Sinar Baru. Bandung. 116 p.

Subijanto, and P. Isbagyo. 1988. Vegetable Production and Policy in Indonesia. Dalam Bruce T. McLean. Vegetable Research in South East Asia. Proc. AVRDC-ADB Workshop on Collaborative Vegetable Research in South East Asia. Shanhua: 97-94.

Suhardi. 1988. Hania dan Penyakit serta Penggunaan Pestisida pada Sayuran Dataran Rendah di Indonesia. Laporan Balithor, Lembang: 99 p.

Stallen, M.P.K.. Suwandi, Achmad Hidayat, Nurmalinda, and J.S. Buurma. 1991. On-Farm Client-Oriented Research (OFCOR) on Shallot in Brebes. Internal Comm. LEHRI/ATA 395 (32): 20 p.



DOI: https://doi.org/10.22146/jpti.9351

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