AKTIVITAS FUNGISIDA EKSTRAK SEMBUNG DELAN ( Sphaeranthus indicus L.) TERHADAP Phytophthora infestans PENEYEBAB PENYAKIT HAWAR DAUN PADA TANAMAN KENTANG DI DESA PANCASARI KECAMATAN SUKASADA KABUPATEN BULELENG

Suanda, I Wayan (2007) AKTIVITAS FUNGISIDA EKSTRAK SEMBUNG DELAN ( Sphaeranthus indicus L.) TERHADAP Phytophthora infestans PENEYEBAB PENYAKIT HAWAR DAUN PADA TANAMAN KENTANG DI DESA PANCASARI KECAMATAN SUKASADA KABUPATEN BULELENG. Majalah Ilmiah Universitas Tabanan, 4 (2). pp. 119-130.

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Abstract

The aim of the research is to recognize the activities of sembung delan ( S. indicus L.) extract to P. infestans . In laboratory, the test was done by growing colony of fungi on petridish containing PDA media an d rough extract of sembung delan with concentration of 0% to 5%. While field test with the same contretation of rough extract of sembung delan was done by using group random design. The parameters observed were the intensity of P. infestans attack, total tubers and weight of potato tubers produced. Result of In - vitro research, showed obtained that the inhibiting power of sembung delan extract at the concentration of 1% to 5% are significant (P<0.05) compared to controlled group. The highest inhibiting po wer occurs at the concentration of 4% to 5%, with inhibiting power percentage of 100% until the eighth day of incubation period. While in the field, intensity of attack for the age of plant prior 61day after cultivation shows significant difference (P< 0.05) between the treatment of sembung delan extract with control. However, there is no significant difference after the plantation is over 61 days after cultivation. The average intensity of attack for the treatment with concentration of 3%, 4%, and 5% for the plants having the age of 58 days after cultivation, i s only up to 50% compared with control. The level of attack is more than 50% for the same age of the plants. When treated with concentration of 2% extract. Total tubers produced between contr ol group and treated group does not show significant differences (P>0.05) but there is significant difference (P<0.05) on the weight of tuber produced. The average increase of tuber weight is between 31.9% to 46%.

Item Type: Article
Uncontrolled Keywords: Sembung delan, Formulation, Potato, Phytophthora infestans
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QK Botany
Q Science > QR Microbiology
Divisions: LPPM - Lembaga Penelitian dan Pengabdian Masyarakat
Depositing User: Rees Jati Prakasa
Date Deposited: 03 May 2018 04:20
Last Modified: 03 May 2018 04:43
URI: http://repo.ikippgribali.ac.id/id/eprint/26

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