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H Syair
Jurusan Agroteknologi Fakultas Pertanian Universitas Haluoleo, Kendari
Agriculture, Biological Sciences & Forestry

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SURVEI KEJADIAN PENYAKIT BUSUK PANGKAL BATANG (Phytophthora capsici) TANAMAN LADA (Piper nigrum. L) DI KABUPATEN KONAWE SELATAN Asniah Asniah; H Syair; Tuti Wahyuni AS
Jurnal Agroteknos Vol 2, No 3 (2012)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v2i3.2279

Abstract

The aim of this study was to know how big the rotten disease incidence on stalk base of pepper that was caused by Phytophthora capsici in South Konawe Regency and also   to know what the farmer’s action to manage  the rotten disease on stalk base of pepper. This study used survey and direct interview to the farmers.   The average of rotten disease incidence on stalk base of pepper from six sampel Villages on the two Subdistrict in South Konawe Regency was 55,66 %, therefore this result include as the criteria of serious attack. The  highest of disease event was found in Lamomea Village with the level of avarage attack was 83 %. Thus, this result was as of very serious attack.  The highest disease incidence was found in Lamomea Village with the level of average attack was 83 %. Thus, this result was as very serious attack. The lowest disease event was found in Cialam Jaya Village with the level of average attack was 24 %, therefore this result classified as light attack. Keywords: disease incidence, rotton disease stalk base of  pepper, Phytophthora capsici, survey
PENGELOMPOKAN PATOTIPE Xanthomonas oryzae pv. oryzae ASAL SULAWESI TENGGARA MENGGUNAKAN PADI GALUR ISOGENIK IRRI H Syair; Samirin Samirin; Teguh Wijayanto; Andi Khaeruni
Jurnal Agroteknos Vol 2, No 1 (2012)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v2i1.2260

Abstract

This Research aimed at grouping of Xanthomonas oryzae pv. oryzae pathotypes in rice cropping center of Southeast Sulawesi using isogenic lines of IRRI, as well as to know the Xanthomonas oryzae pv. oryzae pathotypes dominating and spreading in rice cropping center of Southeast Sulawesi. The pathotype grouping was determined by leaf innoculated cutting method using 30 isolates of Xanthomonas oryzae pv. oryzae from Southeast Sulawesi in 10 isogenic lines, namely IRBB1, IRBB2, IRBB3, IRBB4, IRBB5, IRBB7, IRBB10, IRBB11, IRBB13, and IRBB21. Each isolate was inoculated on the 10 isogenic lines and repeated twice. Observation  of disease intensity was conducted randomly on five leaves at four weeks after inoculation. The disease intensity was measured by the ratio of the length (cm) of leaf blight symptom to total the length of leaf sample (cm). The research results indicated there were seven pathotypes of Xanthomonas oryzae pv. oryzae in Southeast Sulawesi, i.e : pathotype X, XI, XII and four new pathotypes. Pathotype XII was the dominant pathotype, abort 79.31% of the total isolates and spreading in three regencies, Kolaka, Konawe, and South Konawe. Keywords: bacterial leaf blight, Xanthomonas oryzae pv. oryzae, pathotype
Co-Authors Andi Khaeruni Asniah Asniah Samirin Samirin Teguh Wijayanto Tuti Wahyuni AS