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All Journal MAPETA Nusantara Science and Technology Proceedings
Herry Nirwanto
Universitas Pembangunan Nasional "Veteran" Jawa Timur
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology

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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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Abstract

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
Biodiversity of Endophytic Bacteria from Egg Plant in Lowland Purnawati, Arika; Nirwanto, Herry
Nusantara Science and Technology Proceedings 5th International Seminar of Research Month 2020
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2021.0934

Abstract

Endophytic bacteria are a group of microbes that live in plant tissues without causing negative effects and don’t cause sick on plants, are found in various plants, and can be isolated from all parts of the plant: roots, stems, and seeds. Endophytic bacteria in nature, have high diversity because in a single plant can be found more than one kind of endophytic bacteria, so many plants found many kinds of endophytic bacteria. Endophytic bacteria that have been isolated and identified from eggplants. This study aimed to isolate endophytic bacteria from eggplants in lowland Kandat Kediri. Crop sampling was conducted using a systematic random method. The research stages are surveys and microbial isolation of endophytes. Isolation is done from the stems of a healthy eggplant around the sick eggplant. The crop samples were then washed with running water and cut 1-3 cm. The cutting was sterilized by ethanol 70% (30 sec), sodium hypochlorite 5% (5 min), ethanol 70% (30 sec) and rinsed with sterile water (3 minutes). The results are from the stem get 10 isolates of endophytic bacteria that have different characteristics.
Co-Authors Arika Purnawati Hamid, Abdul