Home > Crops & Livestock > Crops > Pecans > 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. 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. Sprayer Calibration for Pecan Orchards [Image: sprayer calibration] The application of pesticides is the most commonly used method for controlling arthropod pests and diseases on pecan trees. Because of the size of the pecan tree, pesticides are primarily applied with large spray machines known as air-assisted sprayers. (PDF Format Only) Pecan Crop Load Management [Image: Cross sections of pecan cultivars showing kernel expansion] This article answers the question, "Why do my pecan trees have a large crop followed by a small one?" and provides answers to several questions concerning mechanical thinning.  more articles... Pecan Pollination Chart [Image: pecan pollination chart] This page provides information on pecan pollen shed and pistillate flower receptivity dates for numerous pecan cultivars. This information is useful for determining which pecan cultivars will pollinate other cultivars. Pecan Orchard Floor Management The information contained in this article was presented at the LSU Pecan Research Station as part of the program of the Louisiana Pecan Growers Association Annual Conference held in Shreveport, LA on June 15-16, 2006. Demonstration plots of many of the herbicides were shown to participants and general information about each herbicide discussed. A general overview of pecan orchard floor management is given and herbicides labeled for use in pecan orchards are listed by site activity. Bug Biz: Black Pecan Aphid [Image: The black pecan aphid] The black pecan aphid is found throughout Louisiana and most pecan-producing states. Description, life cycle, damage and control information included. (PDF Format Only) Pecan Spittlebug [Image: pecan spittlebugs] Pecan spittlebugs are found throughout the pecan-producing regions of Louisiana and can be a serious pest. The severity of infestations varies from year to year and from orchard to orchard. Life cycle, type of injury and control information are included. (PDF Format Only) 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 2012 fungicide list is included. Bug Biz: Stink Bugs and Leaffooted Bugs on Pecans [Image: stink bugs on pecans] Stink bugs and leaffooted bugs are found throughout the pecan-producing regions of the United States. They can be found throughout Louisiana. Description, life cycle, damage and control measures are included. (PDF Format Only) 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. (PDF format only) Pecan Disease Synopsis [Image: Scab lesions on nuts] This document describes the diseases that occur most frequently on pecan trees in Louisiana.