Resistance of Wild Rices, Oryza spp., to the Brown Planthopper, Nilaparvata lugensi (Homoptera: Delphacidae)

Authors

Wu Jung-Tsung, International Rice Research Institute
E. A. Heinrichs, International Rice Research InstituteFollow
F. G. Medrano, International Rice Research Institute

Date of this Version

6-1986

Citation

Environmental Entomology 15:3 (June 1986), pp. 648–653.

doi: 10.1093/ee/15.3.648

Comments

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

Abstract

Of 36 wild rices screened, 19 accessions were resistant or moderately resistant to three biotypes of the brown planthopper, Nilaparvata lugens (Stål), and 9 were resistant or moderately resistant to at least one biotype. Resistant accessions were nonpreferred and N. lugens caged on resistant accessions had low food ingestion rates, slow nymphal development, reduced longevity, low fecundity, and consequently low populations. Two wild rice species decreased the percent hatchability of N. lugens eggs. Some moderately resistant accessions have tolerance to N. lugens, as indicated by low plant damage ratings and plant loss and high percentage N. lugens survival and weight gain. Wild rices are possible sources of new genes for N. lugens resistance.