KORELASI PENYAKIT VIRUS TUNGRO DENGAN BERBAGAI JENIS WERENG PADA TANAMAN PADI (Oryza sativa) Di JAWA TIMUR
Abdul Hamid1) dan Herry Nirwanto2)2). UPN ”Veteran” Jawa Timur
ABSTRACT
The objective of research is to know the correlation between Tungro disease
and various leafhopper at paddy crop in some sub-province East Java. Making of
epidemic 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.
PENDAHULUAN
Luas serangan virus tungro dari tahun ketahun mengalami peningkatan, untuk wilayah Jawa Timur tahun 2005 luas serangan mencapai 955,04 ha, tahun 2006 bertambah menjadi 1.150,10 ha.
Prakiraan kehilangan hasil tahun 2005 sebesar 1.354,37 ton, tahun 2006 meningkat menjadi 1.718,05 ton, angka kenaikan kehilangan hasil mencapai 26,85 %. Anonim, (2006)
Soetarto et al. (2001) dalam Widiarta (2005) mengemukakan bahwa dalam kurun waktu 10 tahun terakhir secara nasional luas serangan penyakit tungro mencapai 17.504 ha/ tahun, dengan estimasi nilai kehilangan hasil mencapai Rp.14,10 miliar/ tahun. .......................................
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