1. Please state project objectives and what work was done this quarter to address them: Objective 1: Determine effects of lowered soil pH on CLas populations and root physiology including internal root apoplast and vascular tissue pH. Due to a collapse in our inoculum trees, we are psyllid inoculating trees for these experiments and will start the greenhouse portion of the study in Spring 2022. All CLas inoculated and non-CLas inoculated trees are ready for the experiment slated for April 29, 2022. Objective 2: Field test multiple acidification materials including organic acids for tree response CLas suppression, nutrient uptake, and root and vascular pH changes In this quarter, we collected soil and leaf tissue samples which show sufficiency in all treatments. We are now evaluating root density, PCR and of selected trees. 2. Please state what work is anticipated for next quarter: Fruit harvest and fruit quality evaluation will also be accomplished this quarter on April 19 and April 21, 2022. Injection of acids and S application were delayed until harvest to avoid any impacts on fruit drop. 3. Please state budget status (underspend or overspend, and why): The budget is on track and meeting the project milestones.