Resistance Induced in European Corn Borers1 in the Laboratory by Exposing Successive Generations to DDT, Diazinon, or Carbaryl23
- 1 February 1970
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 63 (1) , 250-253
- https://doi.org/10.1093/jee/63.1.250
Abstract
When 7-day-old European com borer, Ostrinia nubilalis (Hübner) larvae were treated in the laboratory with 46, 94, and 750 ppm of diazinon, DDT, or carbaryl, respectively, and the same treatment was repeated with survivors of each generation, the selection resulted in strains with some resistance to the test chemical, but there was no crossover of tolerance. Sex ratio and percentage mating were not unduly disturbed by the selection through 12 generations. However, by the 12th generation the total number of eggs and the numbers of hatched, embryonated, and infertile eggs per mass were reduced as were the weights of larvae and pupae of both sexes. Treatment with diazinon extended the duration of the larval stage in both males and females and also cxtended the duration of the pupal state of males. Apparently the exposure of successive generations to these insecticides is deleterious and suppressive to European corn borers.Keywords
This publication has 0 references indexed in Scilit: