Resurgence of Nilaparvata lugens (Stål) Populations as Influenced by Method and Timing of Insecticide Applications in Lowland Rice

Authors

E. A. Heinrichs, International Rice Research InstituteFollow
G. B. Aquino, International Rice Research Institute
S. Chelliah, International Rice Research Institute
S. L. Valencia, International Rice Research Institute
W. H. Reissig, International Rice Research Institute

Date of this Version

2-1982

Citation

Environmental Entomology 11:1 (February 1982), pp. 78–84.

doi: 10.1093/ee/11.1.78

Comments

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

Abstract

Resurgence of Nilaparvata lugens (Stål) after insecticide application is a common phenomenon in rice in South and Southeast Asia. Among other insecticides inducing resurgence, carbofuran, decamethrin, and methyl parathion were selected for this study. Of the various methods of carbofuran application tested, foliar sprays were most active in inducing resurgence. Extent of resurgence was highly influenced by time of insecticide application. Sprays of methyl parathion and decamethrin applied 50 and 65 days after transplanting (DT) induced resurgence in the third generation of N. lugens at ca. 90 DT, whereas earlier applications had little effect. The cause(s) for resurgence was not definitely established, but stimulation of N. lugens reproduction appeared to be of more significance than destruction of natural enemies.