Abstract:
:The in vitro lethal activity of two Bacillus thuringiensis strains (IB-16 and IB-61) against Haemonchus contortus histotropic fourth stage larvae (L(4)) was evaluated. Each B. thuringiensis strain was used as soluble proteins at different concentrations. In addition, the in vitro lethal dose (LD(50)) of each strain was determined against H. contortus L(4) at different times. Data were analyzed by ANOVA and Tukey tests. Less than 50% mortality was observed at 50 and 100 microg/mL during all bioassays. More than 50% mortality was observed at 200 microg/mL at 3 and 5 days after interaction with IB-16 and IB-61, respectively. A 100% mortality was observed with IB-16 on day 5. The LD(50) with IB-16 was 248 microg/mL on day 3, and IB-61 showed an LD(50) at 227 microg/mL on the day 5. Both toxins may have potential as biocontrol agents.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Hernández Linares I,López Arellano ME,Mendoza de Gives P,Liébano Hernández E,de la Parra ABdoi
10.1196/annals.1428.077subject
Has Abstractpub_date
2008-12-01 00:00:00pages
164-6eissn
0077-8923issn
1749-6632pii
NYAS1149077journal_volume
1149pub_type
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