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This document describes the diseases that occur most frequently on pecan trees in Louisiana.
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)
The most important cultural practice the homeowner with pecan trees needs to consider is proper fertilization. This publication includes information and guidelines for fertilizing pecan trees. (PDF Format Only)
This document describes the diseases that occur most frequently on pecan trees in Louisiana.
The key components of the effective use of fungicides for pecan disease control are timing, coverage and concentration. The updated 2015 fungicide list is included.
Two species of yellow aphids are found on pecans in Louisiana and in all pecan-producing states. Descripton, life cycle, damage and control information is included. (PDF Format Only)
The hickory shuckworm is distributed throughout most of the area where pecans are grown – from South Carolina to Texas and Oklahoma. In Louisiana, the hickory shuckworm is found throughout the state. (PDF format only)
Pecan phylloxera are found throughout the native pecan-producing regions of the United States. Beginning in mid-April, galls (knots) begin to appear on the leaf veins, leaf rachises, catkins, current season's shoot growth and nuts of the pecan. Damage, description, life cycle and control information is included. (PDF Format Only)
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.
