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Tytuł pozycji:

Assessment of toxicity and persistence of Yersinia entomophaga and its Yen‐Tc associated toxin.

Tytuł :
Assessment of toxicity and persistence of Yersinia entomophaga and its Yen‐Tc associated toxin.
Autorzy :
Hurst, Mark Robin Holmes
Jones, Sandra
Young, Sandra
Muetzel, Stefan
Calder, Joanne
Koten, Chikako
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Temat :
SOIL moisture
HELIOTHIS zea
YERSINIA
DIAMONDBACK moth
TOXINS
INSECT pests
Źródło :
Pest Management Science; Dec2020, Vol. 76 Issue 12, p4301-4310, 10p
Przedsiębiorstwo/ jednostka :
SOCIETY of Chemical Industry (Great Britain)
Czasopismo naukowe
BACKGROUND The insect‐pathogenic bacterium Yersinia entomophaga MH96 is currently under development as a microbial pesticide active against various pasture and crop pests such as the diamondback moth Plutella xylostella and the cotton bollworm Helicoverpa armigeria. To enable nonrestricted field trials of Y. entomophaga MH96, information on the persistence and nontarget effects of the bacterium and its Yen‐Tc proteinaceous toxin are required. RESULTS: The Y. entomophaga Yen‐Tc associated toxin was found to have limited persistence on foliage and is inactivated by UV light. The Yen‐Tc was rapidly degraded in ovine or bovine rumen fluid or the intestinal fluid of H. armigera. In H. armigera an intestinal protein of >50 kDa was found to cleave the Yen‐Tc bond. Assessment of Y. entomophaga persistence on foliage and in soil found that after 42 days the bacterium could not be detected in soil at 20% soil moisture content but persisted for 72 days at 30–40% soil moisture. Nontarget effects of Y. entomophaga towards earthworms found that the bacterium afforded no adverse effects on worm growth or behavior. A summary of historic Yen‐Tc and Y. entomophaga persistence and toxicity data is presented. CONCLUSION: The bacterium Y. entomophaga and its Yen‐Tc associated toxin have limited persistence in the environment, with the Yen‐Tc being susceptible to UV inactivation and proteolytic degradation, and the bacterium persisting longer in soil of a high moisture content. © 2020 Society of Chemical Industry [ABSTRACT FROM AUTHOR]
Copyright of Pest Management Science is the property of John Wiley & Sons, Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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