Tolerance of the Rice Variety Triveni to the Brown Planthopper, Nilaparvata lugens

Authors

D. T. Ho, International Rice Research Institute
E. A. Heinrichs, International Rice Research InstituteFollow
F. Medrano, International Rice Research Institute

Date of this Version

6-1982

Citation

Environmental Entomology 11:3 (June 1982), pp. 598–602.

doi: 10.1093/ee/11.3.598

Comments

Copyright © 1982 Entomological Society of America. Published by Oxford University Press. Used by permission.

Abstract

Seedling screening and survival and population growth studies on 30-day-old plants indicated similar degrees of susceptibility on Taichung Native 1 (TN1) and Triveni rice to Nilaparvata lugens (Homoptera: Dilphacidae). However, studies in the screenhouse and field indicated that at both the vegetative and mature stage, Triveni possesses tolerance to insect damage, expressed as the ability to survive and produce a higher percentage of productive tillers than TN1 at similar N. lugens populations. Yield reduction caused by feeding of N. lugens was ca. 40% when infested with 400 N. lugens on 35-, 50-, or 75-day-old plants, whereas it was almost 100% on TN1 at the same ages. Photosynthetic activity of seedling-stage Triveni was less affected than that of TN1 when severely damaged by the feeding of N. lugens.