Response of striped stemborer, Chilo Suppressalis to Bacillus Thuringiensis Delta-Endotoxins

Creator

R. M. Aguda, International Rice Research Institute
M. B. Cohen, International Rice Research Institute

Issue Date

10-2002

Abstract

Five purified delta-endotoxins of Bacillus thuringiensis were tested against the striped stemborer, Chilo suppressalis (SSB), using three different bioassay procedures involving the incorporation of toxins into artificial diet. LC₅₀ estimates were obtained for neonate and 10-day old larvae, and effects on growth rate were measured with fourth instars. Cry1Aa was the most effective toxin in all three bioassays. In the bioassays with 10-day old and fourth instar larvae, Cry1Ab was the second most effective toxin, and Cry2A was the least effective. Th LC₅₀ estimates for 10-day old larvae were more robust than those for neonate larvae, as indicated by narrower 95% confidence intervals and higher slopes of the dose-response lines.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

16

Issue

2

Page

156

Document Type

Article

Frequency

semi-annually

Language

English

Recommended Citation

Aguda, R. M. and Cohen, M. B., "Response of striped stemborer, Chilo Suppressalis to Bacillus Thuringiensis Delta-Endotoxins" (2002). Journal Article. 5805.
https://www.ukdr.uplb.edu.ph/journal-articles/5805

En – AGROVOC descriptors

CHILO SUPPRESSALIS; STEM EATING INSECTS; INSECTA; PLANT PESTS; PEST RESISTAENCE; BACILLUS THURINGIENSIS