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| Web URL(s): | https://academic.oup.com/jee/article/81/2/463/2214843/Enhanced-Activity-of-Selected-Combinations-of
Last checked: 02/28/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Gardner, Wayne A. |
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| Author Affiliation: | Department of Entomology, College of Agriculture Experiment Stations, Georgia Station, Griffin, Georgia |
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| Title: | Enhanced activity of selected combinations of Bacillus thuringiensis and Beta-Exotoxin against fall armyworm (Lepidoptera: Noctuidae) larvae |
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| Section: | Biological and microbial control
Other records with the "Biological and microbial control" Section
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| Source: | Journal of Economic Entomology. Vol. 81, No. 2, April 1988, p. 463-469. |
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| Publishing Information: | Lanham, MD: Entomological Society of America |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Application; Bacillus thuringiensis; Beta-exotoxin; Insecta; Instar; Larva; Spodoptera frugiperda; Synergism
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| Abstract/Contents: | "Interactions between Bacillus thuringiensis Berliner and its Β-exotoxin were evaluated in third- and fourth-instar Spodoptera frugiperda (J. E. Smith) in laboratory bioassays. Larvae were placed on diet containing individual or combined treatments of the two agents. The 14-d LC50 and one-half of the 14-d LC50 of B. thuringiensis for each instar were combined with five concentrations of Β-exotoxin ranging from 30 to 240 μg (AI)/ml of diet for third instars and 120 to 360 μg (AI)/ml of diet for fourth instars. Synergism occurred in 9 of the 10 combinations evaluated with third instars and in 8 of the 10 combinations evaluated with fourth instars. Synergistic effects were generally masked beyond 3-7 d after exposure by high mortality caused by concentrations of Β-exotoxin alone. Mean times until death were reduced by as many as 1.2 to 3.9 d in combinations that were synergistic in third instars. Combination of the LC50 of B. thuringiensis with Β-exotoxinat either 180 or 360 μg (AI)/ml also reduced the time interval between exposure and death of fourth instars below those times produced by treatment with either agent alone. Other synergistic combinations in fourth instars yielded lethal times which were significantly shorter than those produced by B. thuringiensis alone. Mortality of neonates and fourth instars placed on peanut foliage treated with aqueous sprays of selected combinations of the two agents was significantly higher than mortality caused by B. thuringiensts alone but did not differ from levels resulting from treatments with Β-exotoxin alone." |
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| Language: | English |
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| References: | 15 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gardner, W. A. 1988. Enhanced activity of selected combinations of Bacillus thuringiensis and Beta-Exotoxin against fall armyworm (Lepidoptera: Noctuidae) larvae. J. Econ. Entomol. 81(2):p. 463-469. |
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| Web URL(s):
https://academic.oup.com/jee/article/81/2/463/2214843/Enhanced-Activity-of-Selected-Combinations-of
Last checked: 02/28/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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MSU catalog number: b2222995a |
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