Utilization of diet- incorporation and panicle- dripping bioassays in evaluating the toxicity of selected Bacillus thuringiensis strains and endotoxins against the striped stem borer, Chilo suppressalls (Walker).

Date

4-1995

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Cesar G. Demayo

Abstract

Toxicity of selected formulations and purified endotoxins of Bacillus tiny./ ngiensis against the striped stem borer, Chilo sumressalis affected by the specific age were investigated using diet-incorporation bioassay. Results showed that mortality was not significantly affected by the difference between neonates and one-day old larvae. The other test which made use of the panicles, centered on the observation of the toxins' effect on the neonates. It was seen that they did not have a knockdown effect and that they were not significantly different from one another. The last test had the diet-incorporation and panicle-dipping bioassays compared. It was further established that the diet- incorporation bioassay was more effective in evaluating the toxicity of B. thuringienses endotoxin Cry IA(c) against the striped stein borers.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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