VismaxTM: A novel peptide-based therapeutic for mitigation of citrus diseases, including HLB

VismaxTM: A novel peptide-based therapeutic for mitigation of citrus diseases, including HLB

Report Date: 06/11/2021
Project: 20-015   Year: 2021
Category: Other
Author: Michelle Leslie
Sponsor: Citrus Research and Development Foundation

1. Please state project objectives and what work was done this quarter to address them: Objective: Determine whether Vismax treatment promotes resistance to other major citrus diseases, specifically citrus canker and phytophthora root rot in greenhouse assays with Dr. Evan Johnson Progress (Year1 Q1; 3/4 – 6/11/2021)a. Canker trial #1: Status = Complete. Trial included foliar and soil application methods for Vismax, 7 days prior to inoculation of sweet orange with X. citri. Rate testing of foliar applications (1X, 2X, and 4X concentration) was performed. Trial was successful with controls performing as expected. Raw data and preliminary report received.b. Phytophthora trial #1 (traditional method; potted trees): Status = in progress, propagule counts. Trial includes foliar and soil applications of Vismax, and Ridomil Gold control applications.c. Phytophthora trial #2 (traditional method; Rhizotron): Status = in progress, imaged weekly for root growth. Trial includes foliar and soil applications of Vismax, and Ridomil Gold control applications.d. Trials were visited by EE personnel in May 2021 (no cost to grant)2. Please state what work is anticipated for next quarter:a. Completion of Phytophthora trials #1 and #2, including data anlaysisb. Second canker trials to be repeated to confirm the results of Canker trial #1c. Disease-free seedlings on order for repeat of Phytophthora trials. 3. Please state budget status (underspend or overspend, and why):Status = on budget ($14,462 of $30,600 budgeted in Year 1 – March 1, 2021- Feb 28, 2022) $14,462 paid to University of Florida on 04/05/2021 per University of Florida – Elemental Enzymes Ag & Turf LLC agreement to initiate trials 


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