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INDONESIA
Jurnal Perlindungan Tanaman Indonesia
Published by Universitas Gadjah Mada
ISSN : 14101637     EISSN : 25484788     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 13 Documents
 1   2 
Search results for , issue "Vol 2, No 1 (1996)" : 13 Documents clear
Pengendalian Penyakit Karat Daun Kopi dengan Ekstrak Teh Hitam Christanti Sumardiyono; Setyo Agung
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4538.326 KB) | DOI: 10.22146/jpti.9362

Abstract

The research was done to know the efficacy of black tea extract to control coffee leaf rust, the most important disease of Arabica coffee caused by the fungus Hemileia vastatrix B et Br. Black tea was extracted by boiling 50 g of tea in 500 ml of water until 50 ml of solution was left and used as spraying material after 10 time dilution. Influence of black tea extract to urediospores germination was done by spore germination technique. Field experiment was done at Pagilaran Tea Plantation with a susceptible Arabica coffee Kate 26 variety. Coffee plants was sprayed with diluted tea extract eight times with 10 days interval and 0,3% of triadimefon was used as standart fungicide. The result showed that black tea extract inhibited germination of urediospora and reduced germtube length up to 10-4 dilution. The extract of black tea could reduce disease intensity of coffee leaf rust in the field better than triadimefon. Ten days after first spraying, disease intensity was reduced but it increased after 5 times spraying. After 8 times spraying disease intensity on coffee tree sprayed with the black tea extract was lower than that sprayed with tradimefon. 
Jamur Upas (Upasia salmonicolor) pada Daun Kopi di Pagilaran Ambarwati Harsojo Tjokrosoedarmo
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5675.004 KB) | DOI: 10.22146/jpti.9366

Abstract

The result of this study showed that most of fungus as thin mycelial layer on the coffee leaves were connected with pink fungus on the branch. The microscopic study showed the hyaline mycelia producing perpendicular branches, and anastomose easily; the hyphal cells contain one to four nuclei. The anatomy of pink incrustation of fungus composed of four layers: 1. basal layer; 2. intermediate layer; 3. subhymenial layer; and 4. hymenial layer. From the results of both field and laboratory studies it is concluded that the fungus on the coffee leaf is actually the cobweb stage of pink fungus occurring on the leaves, and it is notorious fungus because it may act as inoculum source of pink disease.
Peran Infeksi Jamur dalam Memperparah Kerusakan Buah Kakao Akibat Serangan Helopeltis sp. Jurnal PTI Vol. 1 No. 1 Hal. 28-32 Teddy Suparno
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5081.112 KB) | DOI: 10.22146/jpti.9379

Abstract

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