CucCAP researchers find that different downy mildew populations have different types of fungicide resistance

Genetic analyses by the Quesada laboratory at NC State found that different clades of P. cubensis vary for the predominant mutations conferring resistance. These findings of clade-specific resistances can facilitate the design of more effective fungicide programs tailored to crop and region.

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APS 2023 Southern Division Meeting

Presentations from the CucCAP team include: Monitoring for mutations related to oxathiapiprolin fungicide resistance in Pseudoperonospora cubensis populations; Addressing emerging viruses in cucurbits through a working group and stakeholder education; and Competitiveness of whitefly-transmitted yellowing viruses can influence virus dominance in cucurbits.

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Improved detection methods for CDM

CucCAP researchers develop improved detection methods for downy mildews infecting cucurbit crops. Management of cucurbit downy mildew relies on an intensive fungicide program.  Timely alerts of appearance of sporangia can help growers to determine need to initiate fungicide sprays. Research by CucCAP scientists developed improved ability to detect airborne sporangia and distinguish among types that infect different kinds of crops. This improved methodology could be used as part of an advisory system to time fungicide applications to protect cucurbit crops. 

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