Results 111 to 120 of about 244 (142)
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Trap Crop for Nephotettix virescens (Homoptera: Cicadellidae) and Tungro Management in Rice
Journal of Economic Entomology, 1988Use of a trap crop as an alternative to intensive chemical control of Nephotettix virescens (Distant) was tested. Tungro-susceptible ‘IR42’ rice cultivar was used both as a trap crop and main crop. Trapped fields had two, three, or four trap crop border rows, which were planted 15 d earlier than the main crop and were sprayed with cypermethrin weekly ...
R. C. Saxena +2 more
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Madras Agricultural Journal, 1976
Two field experiments were conducted during 1972-73 and 1973-74 to test the efficacy of twelve insecticides as foliar sprays against rice leafhopper, Nephotettix virescen (Dist). Fenitrothion (0.05%). monocrotophos (0.10%), parathion (0.5%), dicrotophos (0.5%). and orthone (0.30%) were found to be more toxic to the leafhopper.
Jayaraj S
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Two field experiments were conducted during 1972-73 and 1973-74 to test the efficacy of twelve insecticides as foliar sprays against rice leafhopper, Nephotettix virescen (Dist). Fenitrothion (0.05%). monocrotophos (0.10%), parathion (0.5%), dicrotophos (0.5%). and orthone (0.30%) were found to be more toxic to the leafhopper.
Jayaraj S
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Tethered flight activity of Nephotettix virescens (Hemiptera: Cicadellidae) in the Philippines
Bulletin of Entomological Research, 2000The flight potential of Nephotettix virescens (Distant), the most important vector of rice tungro virus disease, was assessed using tethered flight techniques. Most individuals tested were not willing to fly in response to stimulation, or flew for very short times. A small proportion of leafhoppers flew for long periods and one female flew for almost 7
R J, Cooter, D, Winder, T C, Chancellor
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A mathematical model of transmission of rice tungro disease by Nephotettix Virescens
AIP Conference Proceedings, 2016One of the major threats in rice agriculture is the Tungro virus, which is transmitted semi-persistently to rice plants via green rice leafhoppers called Nephotettix Virescens. Tungro is polycyclic and complex disease of rice associated by dual infection with Rice Tungro Bacilliform Virus (RTBV) and Rice Tungro Spherical Virus (RTSV).
Nikki T. Blas +2 more
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Nephotettix virescens . [Distribution map].
Distribution Maps of Plant Pests, 2005Abstract A new distribution map is provided for Nephotettix virescens (Dist.) (W. bipunctatus (F.), N. impicticeps Ishihara). (Hemipt., Cicadellidae) (Rice Leafhopper).
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Toxicological investigations against rice green leafhopper,Nephotettix virescens(Distant)
Tropical Pest Management, 1986Abstract Among nineteen granular formulations evaluated against green leafhopper, thiocyclam hydrogen oxalate, fensulfo‐thion, carbofuran, BPMC, MIPC and monocrotophos possessed good persistent toxicity while thiocyclam hydrogen oxalate, MIPC and BPMC exhibited a better knockdown effect.
N. V. Krishnaiah, M. B. Kalode
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Crop Protection, 1986
Abstract Levels of resistance of nine rice varieties to Nephotettix virescens (Distant) were determined. As judged by the seedbox screening, survival and oviposition, feeding and population growth tests, IR29 and IR56 were resistant, IR8, IR36, and IR42 moderately resistant, and IR22, IR46, Utri Rajapan and TN1 susceptible.
M.M. Myint, H.R. Rapusas, E.A. Heinrichs
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Abstract Levels of resistance of nine rice varieties to Nephotettix virescens (Distant) were determined. As judged by the seedbox screening, survival and oviposition, feeding and population growth tests, IR29 and IR56 were resistant, IR8, IR36, and IR42 moderately resistant, and IR22, IR46, Utri Rajapan and TN1 susceptible.
M.M. Myint, H.R. Rapusas, E.A. Heinrichs
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Host specificity of rice green leafhoppers,Nephotettix virescens (Distant) andN. nigropictus (Stål)
Proceedings: Animal Sciences, 1986Intensive host range studies comprising of 55 common weeds and eight cultivated plant species indicated thatNephotettix virescens could survive and breed only on susceptible rice variety, whileN. nigropictus had a wider host range consisting of rice, sugarcane and five graminaceous weeds.N.
Kasi Viswanathan, M B Kalode
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Mycological Research, 1991
Determinations were made of the median lethal concentration (LC 50 ) and median lethal time (LT 50 ) of conidia and blastospores of B. bassiana against adult Nephotettix virescens (green leafhoppers). There was no significant difference between the LC 50 values for blastospores produced in carbon- and nitrogen-limited cultures, but both types of ...
Brian S. Lane +2 more
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Determinations were made of the median lethal concentration (LC 50 ) and median lethal time (LT 50 ) of conidia and blastospores of B. bassiana against adult Nephotettix virescens (green leafhoppers). There was no significant difference between the LC 50 values for blastospores produced in carbon- and nitrogen-limited cultures, but both types of ...
Brian S. Lane +2 more
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Crop Protection, 1987
Abstract The genetics of resistance to green leafhopper, Nephotettix virescens (Distant), in 15 cultivars of rice, Oryza sativa L., was studied. Results showed that cvs Katia Bagder 13–20, Laki 659, Lasane, Asmaita, and Choron Bawla possess two dominant genes for resistance.
B. Ruangsook, G.S. Khush
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Abstract The genetics of resistance to green leafhopper, Nephotettix virescens (Distant), in 15 cultivars of rice, Oryza sativa L., was studied. Results showed that cvs Katia Bagder 13–20, Laki 659, Lasane, Asmaita, and Choron Bawla possess two dominant genes for resistance.
B. Ruangsook, G.S. Khush
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