Utilization of several biopolymers for granular formulations of Bacillus thuringiensis

Bacillus thuringiensis variety aizawai was encapsulated within several biopolymers (gelatin, pectin, chitin, alginate, and cornstarch) and assayed for biological activity against neonate Trichoplusia ni (Hubner). Granules were made with various solvents, and a total of 8 formulations were tested. Ne...

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Bibliographic Details
Published in:Journal of economic entomology 1998-10, Vol.91 (5), p.1109-1113
Main Authors: Ramos, L.H.M. (Fac. de Ciencias Biologicas, Monterrey N.L., Mexico.), McGuire, M.R, Wong, L.J.G
Format: Article
Language:English
Subjects:
ADHERENCE
ADHESION
BACILLUS THURINGIENSIS
BACILLUS THURINGIENSIS SUBSP. AIZAWAI
Biological and medical sciences
BIOLOGICAL CONTROL
Control
CONTROL BIOLOGICO
ENCAPSULACION
ENCAPSULATION
FEEDING PREFERENCES
FORMULACIONES
FORMULATION
FORMULATIONS
Fundamental and applied biological sciences. Psychology
GRANULE
GRANULES
GRANULOS
LUTTE BIOLOGIQUE
MECHANICAL PROPERTIES
MORTALIDAD
MORTALITE
MORTALITY
Noctuidae
Phytopathology. Animal pests. Plant and forest protection
POLIMEROS
POLYMERE
POLYMERS
PREFERENCE ALIMENTAIRE
PREFERENCIAS ALIMENTARIAS
PROPIEDADES MECANICAS
PROPRIETE MECANIQUE
Protozoa. Invertebrates
SUPERVIVENCIA
SURVIE
SURVIVAL
TOXICIDAD
TOXICITE
TOXICITY
TRICHOPLUSIA NI
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Summary:Bacillus thuringiensis variety aizawai was encapsulated within several biopolymers (gelatin, pectin, chitin, alginate, and cornstarch) and assayed for biological activity against neonate Trichoplusia ni (Hubner). Granules were made with various solvents, and a total of 8 formulations were tested. Nearly 100% mortality occurred with all formulations except those made with chitin. B. thuringiensis formulations made with gelatin, pectin, or cornstarch and stored in the laboratory for 12 mo exhibited no detectable decrease in toxic activity against T. ni larvae. Assays that measured resistance to wash-off demonstrated that granules made with gelatin and pectin were retained on cotton leaves. Experiments were conducted to determine palatability of several formulations in 2-choice preference tests. T. ni larvae preferred granules containing gelatin or pectin
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/91.5.1109