Sumber Inokulum, Respons Varietas, dan Efektivitas Fungisida terhadap Penyakit Karat Putih pada Tanaman Kris

- Suhardi

Abstract


ABSTRAK. Penelitian untuk mengetahui peranan bibit sebagai sumber inokulum, respons varietas krisan, serta interval
penyemprotan fungisida dilakukan di Balai Penelitian Tanaman Hias. Survai kesehatan bibit dilakukan di lahan petani
penghasil bibit krisan pada bulan Juli 2002. Penelitian di rumah plastik untuk mengetahui respons varietas krisan
serta efektivitas penyemprotan fungisida, dilakukan dari bulan Juli-September 2002. Hasil penelitian menunjukkan
bahwa bibit merupakan sumber inokulum bagi penyakit karat pada tanaman krisan. Pada tanaman individual, baik di
rumah plastik maupun rumah kaca, perkembangan penyakit karat tertekan. Kultivar Phuma White relatif lebih tahan
dibanding cv. Reagent Ungu dan cv. Town Talk. Fungisida benomil (benzimidazol) belum menunjukkan keefektifan
untuk pengendalian penyakit karat pada tanaman krisan (Puccinia horiana).

ABSTRACT. Suhardi. 2009. Inoculum Source, Variety Response, and Fungicide Efficacy to Rust Disease of
Chrysanthemum. Studies to evaluate the role of cutting as an inoculum source, variety resistance, and fungicide
application interval were done at Indonesian Ornamental Crops Research Institute. Survey of cutting health was
carried out at farmer’s fields as seed producer on July 2002. A study under plastichouse to evaluate the response of
some cultivars and determine the efficacy of fungicide applications was carried out from July-September 2002. The
results indicated that cuttings were the inoculum source of rust on chrysanthemum. On individual plant, both under
plastic and glasshouse, the development of white rust was suppressed. Phuma White cultivar relatively more resistant
than cv. Reagent Ungu and cv. Town Talk. Benomyl (benzimidazole) fungicide was not effective yet in controlling
chrysanthemum white rust (P. horiana).


Keywords


Dendranthema grandiflora; White rust; Puccinia horiana; Inoculum source; Variety resistance; Fungicide efficacy

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DOI: http://dx.doi.org/10.21082/jhort.v19n2.2009.p%25p

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