What question did this study set out to answer?

To evaluate the risk of Pseudoperonospora cubensis developing field resistance to the carboxylic acid amide fungicide flumorph relative to dimethomorph and azoxystrobin.

December 20, 2007Pest Management Science

Assessing the risk of resistance in Pseudoperonospora cubensis to the fungicide flumorph in vitro

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Authors

SZShusheng ZhuYunnan Agricultural University PLPengfei LiuXinjiang Agricultural University XLXili LiuPlant Protection Institute

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Implication

In vitro experimental study demonstrates moderate resistance risk and reduced fitness in Pseudoperonospora cubensis under flumorph exposure, suggesting field resistance can be managed.

Key Points

To evaluate the risk of Pseudoperonospora cubensis developing field resistance to the carboxylic acid amide fungicide flumorph relative to dimethomorph and azoxystrobin.
Attempted selection of resistant Pseudoperonospora cubensis isolates using sporangial adaptation on fungicide-treated leaves and UV mutagenesis.
Assessed resistance levels via maximum resistance factor (MRF), evaluated mutant fitness including pathogenicity and sporulation, and examined cross-resistance patterns.
Selection on fungicide-treated leaves failed to yield flumorph-resistant mutants, whereas UV mutagenesis generated moderately resistant mutants with MRF < 100, compared to readily obtained azoxystrobin-resistant mutants with MRF = 733.
Flumorph-resistant mutants exhibited lower pathogenicity and sporulation than wild-type isolates and azoxystrobin-resistant mutants, while displaying cross-resistance to dimethomorph.

Cite This Study

Zhu et al. (2007) studied this question.

synapsesocial.com/papers/6a7cabc6fd7ae2306b771062 https://doi.org/10.1002/ps.1515

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Implication

In vitro experimental study demonstrates moderate resistance risk and reduced fitness in Pseudoperonospora cubensis under flumorph exposure, suggesting field resistance can be managed.

Assessing the risk of resistance in Pseudoperonospora cubensis to the fungicide flumorph in vitro

Discussion

Member takes

Implication

Key Points

Cite This Study

Assessing the risk of resistance in Pseudoperonospora cubensis to the fungicide flumorph in vitro

Discussion

Member takes

Implication

Key Points

Cite This Study

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