Abstract
The susceptibility ofThaumetopoea wilkinsoni larvae toBacillus thuringiensis (Bt) formulations was screened in 2003 and 2004. Eggs and larvae were collected from pine forests in 11 geographical locations in Israel. Larval mortality bioassays were conducted with commercial formulations (Delfin WG, Dipel DF and Foray 48B) at concentrations ranging from 0.001% to 0.1%. Significant differences in susceptibility toBt were recorded among populations that were treated withBt intensively, frequently, or never. The mortality recorded in a population that was never treated withBt was twice that in an intensivelyBt-treated population. The correlation between susceptibility toBt and the possible resistance to the microbe is discussed.
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http://www.phytoparasitica.org posting Jan. 31, 2007.
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Gindin, G., Navon, A., Saphir, N. et al. Differing susceptibility toBacillus thuringiensis formulations ofThaumetopoea wilkinsoni populations between forests with differentBt management in Israel. Phytoparasitica 35, 179–190 (2007). https://doi.org/10.1007/BF02981112
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DOI: https://doi.org/10.1007/BF02981112