Toxicity of microbial insecticide bacillus thuringiensis Berliner vars kurstaki and aizawai to the larvae of Spodoptera litura Fabr. at different instars
Issue Date
10-2004
Abstract
The life cycle of the cutworm, Spodoptera litura (Lepidoptera: Noctuidae), an important pest of many agricultural crops, was studied on castor leaves to ascertain the number and duration of larval instars prior to bioassay using Bacillus thuringiensis var kurstaki and aizawai on the different instars. Two-day-old second, one day-old third, and one-day-old fourth instar larvae of uniform sizes were used in the toxicity tests. Bt aizawa was more toxic than Bt kurstaki to the second, third and fourth instar S. litura, all the test larvae had comparable reactions to Bt aizawa, toxic both in the leaf dipping and droplet feeding tests. Both Bt varieties have good potential for use in the management of S. litura on different agricultural crops.
Source or Periodical Title
Philippine Entomologist
ISSN
0048-3753
Volume
18
Issue
2
Page
178
Document Type
Article
Frequency
semi-annually
Language
English
Recommended Citation
Mangarengi, N.; Morallo-Rejesus, B.; and Caoili, B., "Toxicity of microbial insecticide bacillus thuringiensis Berliner vars kurstaki and aizawai to the larvae of Spodoptera litura Fabr. at different instars" (2004). Journal Article. 5658.
https://www.ukdr.uplb.edu.ph/journal-articles/5658
En – AGROVOC descriptors
SPODOPTERA LITURA; BACILLUS THURINGIENSIS; INSTARS; LIFE CYCLE; PEST MANAGEMENT; PEST CONTROL