Abstract: Disclosed herein are compositions and methods that involve recombinant polynucleotide molecules, such as single or double-stranded DNA or RNA molecules, also referred to “triggers”, that are useful for controlling or preventing E. necator infection, or recombinant DNA constructs for making such RNA molecules or for making transgenic grape plants resistant to E. necator infection. In some embodiments, polynucleotide triggers are provided as topically applied agents for controlling or preventing infection of a plant by E. necator. In some embodiments, grape plants with improved resistance to infection by E. necator, such as transgenic grape plants (including seeds or propagatable parts) expressing a polynucleotide trigger are provided. In some embodiments, grape plants (including seeds or propagatable parts) that have been topically treated with a composition comprising a polynucleotide trigger (e.g., grape plants that have been sprayed with a solution of dsRNA molecules) are provided.

Abstract: Disclosed herein are compositions and methods that involve recombinant polynucleotide molecules, such as single or double-stranded DNA or RNA molecules, also referred to “triggers”, that are useful for controlling or preventing E. necator infection, or recombinant DNA constructs for making such RNA molecules or for making transgenic grape plants resistant to E. necator infection. In some embodiments, polynucleotide triggers are provided as topically applied agents for controlling or preventing infection of a plant by E. necator.

Abstract: Disclosed herein are compositions and methods that involve recombinant polynucleotide molecules, such as single or double-stranded DNA or RNA molecules, also referred to “triggers”, that are useful for controlling or preventing E. necator infection, or recombinant DNA constructs for making such RNA molecules or for making transgenic grape plants resistant to E. necator infection. In some embodiments, polynucleotide triggers are provided as topically applied agents for controlling or preventing infection of a plant by E. necator. In some embodiments, grape plants with improved resistance to infection by E. necator, such as transgenic grape plants (including seeds or propagatable parts) expressing a polynucleotide trigger are provided. In some embodiments, grape plants (including seeds or propagatable parts) that have been topically treated with a composition comprising a polynucleotide trigger (e.g., grape plants that have been sprayed with a solution of dsRNA molecules) are provided.