Biology of a local population and evaluation of the toxicological and behavioral effects of cry 1A (c) gene product of Bacillus thuringiensis against the striped stemborer Chilo suppressalis walker (Lepidoptera: Pyralidae

Date

4-1993

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Cesar G. Demayo

Abstract

The life history data of two local populations Chilo suppressalis and their hybrids were studied. Data gathered showed that larval development time was not significantly affected by the interaction between sex and population. Pupal development time however indicated that sex and population interaction significantly affects the pupal development. Total development time was not significantly affected by the sex and population interaction. The Goodness of Fit Test showed that the two local populations and their hybrids deviates from the Hardy-Weinberg sex ratio and all favoring the production males over females. These indicates that sex is genetically controlled. Toxicity test on the first instar larvae showed that the Cry 1A(c) toxin was effective in causing death to the larvae. Probit analysis showed that the toxin could caused mortality to the insect even at low concentrations.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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