more... > Research Stations > Pecan > Plant Pathology > Pecan Bacterial Leaf Scorch [Image: Large native pecan tree in Natchitoches Parish, La.] For more than two decades there was uncertainty about the cause of a common disease among pecan trees referred to as leaf scorch. LSU AgCenter researchers were able to distinguish the cause of the disease, which has improved pecan production. When should I begin fungicide applications for control of scab disease each year? This is an important decision, and notalways one with an easy answer. The safest answer for someone who has someresponsibility for answering this question is to be conservative and suggest spraying earlyand spraying often. Procedure for Hot Water Treatment of Pecan Scion Wood [Image: Pecan Bacterial Leaf Scorch on a Cape Fear tree.] This document provides a step-by-step procedure for hot water treatment of pecan scion wood to eliminate the bacterial leaf scorch pathogen. Pecan Bacterial Leaf Scorch: Cultivar Susceptibility and Pathogen Transmission [Image: Pecan Bacterial Leaf Scorch on a Cape Fear tree.] This article is a copy of a paper presented at the National Pecan Scientists Meeting in Branson, Missouri, in July 2005. It discusses pecan cultivar susceptibility and transmission of the Pecan Bacterial Leaf Scorch pathogen in pecans.  more articles... Pecan Scab Disease [Image: Pecan Scab Disease] Pecan scab disease is the most economically damaging disease of pecan production in the southeastern United States. The disease affects stem, leaf and nut growth, causing reduced yield. This publication includes information on the development, symptoms and control of the disease. Fungicide Application Recommendations for Pecan Disease Control [Image: Air-blast sprayer] The key components of the effective use of fungicides for pecan disease control are timing, coverage and concentration. The updated 2009 fungicide list is included. Pecan Disease Synopsis [Image: Scab lesions on nuts] This document describes the diseases that occur most frequently on pecan trees in Louisiana.