Integration of Host Plant Resistance and Insecticides in the Control of Nephotettix virescens (Homoptera: Cicadelli-dae), a Vector of Rice Tungro Virus

Authors

E. A. Heinrichs, International Rice Research InstituteFollow
H. R. Rapusas, International Rice Research Institute
G. B. Aquino, International Rice Research Institute
F. Palis, International Rice Research Institute

Date of this Version

4-1986

Citation

Journal of Economic Entomology 79:2 (April 1986), pp. 437–443.

doi: 10.1093/jee/79.2.437

Comments

Copyright © 1986 Entomological Society of America; published by Oxford University Press. Used by permission.

Abstract

Combined effects of levels of vector resistance and insecticide application in control of rice tungro virus (RTV) were determined in three field tests. Cultivar “IR28,” with high levels of resistance to the vector, Nephotettix virescens (Distant), had low RTV infection in all treatments including the untreated check. In moderately resistant “IR36,” RTV decreased with an increase in level of insecticide but did not decrease to a level equaling the untreated “IR28.” The N. virescens-susceptible cultivar “IR22” had extremely high levels of RTV infection at all insecticide levels. Economic analysis indicated that gross profit and net gain were highest in the N. virescens-resistant “IR28,” intermediate in moderately resistant “IR36,” and lowest in susceptible “IR22.”