Differential Feeding by Two Strains of Fall Armyworm Larvae on Carbaryl Treated Surfaces123
- 1 April 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 72 (2) , 202-203
- https://doi.org/10.1093/jee/72.2.202
Abstract
Strains of Spodoptera frugiperda (J. E. Smith) larvae classified as resistant (R; LD100 > 250 µg/2.54 cm2) and susceptible (S; LD100 25µg/2.54cm2) were allowed to choose: between leaves treated with technical carbaryl (2.2 kg AI/100 liters) and untreated leaves; between leaves treated with 80% sprayable carbaryl (2.2 kg AI/100 liters) and untreated leaves; and between leaves treated with the carrier (2.2 kg equivalent/100 liters) for formulating the 80% sprayable and untreated leaves. Mortalities of the R (19%) and S (58%) strains were as expected and were significantly different. Mortalities for the carrier treated leaves and the untreated leaves were not different. The total amount of feeding by the R (298 mm2) and the S (149 mm2) larvae was significantly different, but both strains fed less on the carbaryl treated leaves than on the untreated leaves (R 418 vs. 200 mm2 and S 178 vs. 97 mm2). The data suggest that survival of fall armyworm larvae exposed to carbaryl treated plant material may be a result of avoidance as well as insect resistance to the chemical.This publication has 0 references indexed in Scilit: