Early Detection

Baumgartner_SCRIupdateDetection-p1agaqv3dk17odh09dqv56p1o1mKendra Baumgartner
Our goal is to develop a new method to detect trunk diseases by sampling asymptomatic leaves. We revealed a unique set of grape genes expressed in asymptomatic leaves in the early phase of infection, using Botryosphaeria dieback pathogen Neofusicoccum parvum as a model to study host responses to a trunk pathogen.  Tests are in progress to confirm specificity of these grape genes to Neofusicoccum infection, in inoculations with other trunk pathogens, common foliar pathogens, and to rule out possible interactions with drought stress.
Link to presentation:Early Detection

Almond Resistant Cultivar Selection

Goal – Identify almond cultivars with resistance to the most aggressive causal agents of wood-canker diseases of almond: Band canker and Lower limb dieback.

Activities – Compared virulence of two Neofusicoccum species inoculated to the woody stems of potted almond plants.



Results & Outputs
Peerless was the most resistant to both species of the pathogen. Carmel, Sonora, and Padre were among most susceptible, with some differences depending on the species. Susceptible cultivars had the highest mortality. Cankers were so severe in Sonora that 50% of the trees died after 10 months. This means that infections of young trees, esp. of susceptible cultivars, must be protected in young orchards.

Significant Outcomes & Impacts
Now that we know the causal agents, we must identify preventative practices.