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All Journal AGRIKA MAPETA Plumula : Berkala Ilmiah Agroteknologi AGRIVITA, Journal of Agricultural Science Jurnal Penelitian Pertanian Terapan JURNAL AGROHITA Agro Bali: Agricultural Journal Agrienvi : Jurnal Ilmu Pertanian Jurnal Agrotropika Biofarm : Jurnal Ilmiah Pertanian Nusantara Science and Technology Proceedings Journal of Applied Agricultural Science and Technology
Herry Nirwanto
Program Studi Agroteknologi, Fakultas Pertanian, UPN “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Other

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 1 
KORELASI PENYAKITVIRUS TUNGRO DENGAN BERBAGAI JENIS WERENG PADA TANAMAN PADI (Oryza sativa) Di JAWA TIMUR Hamid, Abdul; Nirwanto, Herry
MAPETA Vol 12, No 1 (2009): MAPETA
Publisher : MAPETA

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ABSTRACTThe objective of research is to know the correlation between Tungro disease and various leafhopper at paddy crop in some sub-province East Java. Making ofepidemic model conducted by using obtained data of laboratory Perception of Pest and Disease of Crop Food and Horticulture and also Report Observer of Pest Disease . Data analysis was based on the intensity of tungro disease, the frequency of rainy day and rainfall per month, pattern of planting, population of green leafhopper, as well as competitor insect as natural enemy. Correlation and multiple regression analysis was used to make epidemic model. The results of this study indicated that epidemic model of tungro disease with linear regression was Y= 641.659 + 1.925 ( Rainfall + 17.815 (Green leafhopper)) + 30.014 ( Brown leafhopper) + 60.493 ( Zigzag leafhopper) - 59.444 ( spider) - 122.425 ( Rain day) ( R = 0.988). This model significantly can explain correlation between rainfall, rainy day, vector insect to the severity of tungro disease at paddy crop. Keyword: Model, Tungro disease, green leafhopper
KAJIAN ASPEK SPASIAL PENYAKIT BERCAK UNGU (A lternaria porri Cif. (Ell) PADA TANAMAN BAWANG MERAH Nirwanto, Herry
MAPETA Vol 10, No 3 (2008): MAPETA
Publisher : MAPETA

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The research was conducted at ex-rice field farm in countryside of Klerek, district of Junrejo, Batu. The research took place in rainy season from October until December 2005. Research location resided at height 800 m above sea level. To understand the distribution of purple blotch disease at each observation time, data was obtained from the amount of leaf infection at every crop clump of sample from each experiment plot. The result of the research showed that at age 49 and 52 days after planting, patogen distributed randomly. At the time of early observation 49 days after planting, the distribution of disease followed theory distribution, that is, poisson distribution (p== 0,57). Hereinafter, at age 52 and 55 days, pathogen disseminate aggregately, by increasing age until age 61 days after planting, the distribution of patogen reverse to have random character. The development of disease in the early observation was linear and at age 58-61 days after planting,  it started in fonn of curvilinier. Key words: Alternaria porri, bawang merah, distribusi, laju infeksi
Co-Authors Alfa, Maria Rodhya Arika Purnawati Endang Triwahyu Prasetyawati Fatimah Nabila Zahra Hamid, Abdul Ika Rochdjatun Sastrahidayat Khansa Amara Khansa Amara Latief Imanadi Lius, Michelle M Rifqi Haikal Maria Rodhya Alfa Nabila Alysia Multazam Nindias O. Wulandari Nindias Oktavia Wulandari Nisa, Isnaini Lailatun Noni Rahmadhini Paramitha Pasaribu Prasetyo, Dandy Putra, Dandi Rahmansyah Ramadhini, Noni Rizky Nur Affandy Sarah Hikmah Marieska Sarah Hikmah Marieska Sasiska Rani Septikahady, Hani Sri Wiyatiningsih Sutikno Sutikno Taufik Hidayat Tri MUJOKO Umam, Amirul Widajati, Wiludjeng Windriyanti, Wiwin Wiwik Sri Harijani Wiwik Sri Harijani Yenny WURYANDARI