Impact of Insect Vector Migration Distance on Rice Yellow Mottle Virus Severity and Epidemiology

Joseph, A. and Omole, M. M. and Olufolaji, D. B. and Nwilene, F. E. and Onasanya, A. (2013) Impact of Insect Vector Migration Distance on Rice Yellow Mottle Virus Severity and Epidemiology. International Journal of Applied Research and Technology, 2 (6). pp. 139-146. ISSN 2277-0585

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This study was carried out to investigate the effects of migration distance of three insect vectors on Rice yellow mottle virus (RYMV) severity in a screenhouse experiment. Eight differential rice cultivars were sown at a distance of 0.5m, 1.0m and 1.5m respectively from infected rows. Adults of Oxya hyla (Stal), Locris rubra (Fabricius) and Chnootriba similis (Thunberg) were released into the screenhouse to feed on the infected rows, acquire the virus and transmit to the healthy test cultivars. Data on disease severity and chlorophyll content were taken at 56 days after sowing the test cultivars. Oxya hyla was observed to move and transmitted RYMV in an unpredictable manner. Highest RYMV severity occurred in centres of the screenhouse with C. similis and L. rubra. The highest disease severity (49.92%) was recorded in PNA647F4-56 sown at a distance of 0.5m from the infected rows while the lowest disease severity (11.32%) was observed in Moroberekan sown at 1.5m from the infected rows. Chlorophyll reduction varied from 9.28% to 65.32%. Findings from this preliminary investigation could be exploited in monitoring the movement of RYMV vectors from one plant to the other. This strategy can then be utilized in studying virus spread under field conditions.

Item Type: Article
Uncontrolled Keywords: : Insect, Rice, Yellow Mottle Virus, Disease Severity, Epidemiology
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Q Science > QK Botany
Q Science > QR Microbiology
S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mr Tayo Okunlola
Date Deposited: 13 Jul 2016 09:52
Last Modified: 13 Jul 2016 09:55

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