A 4th application should then be made 2 weeks later followed by a 5th application 3 weeks later. Diseases are serious in Texas, especially Pecan Scab disease. In east, south and central Texas effective pecan-labeled fungicide sprays must be applied during periods of rainfall to prevent Pecan Scab. In this area varieties need to be resistant to Pecan Scab. In addition, Stem-end Blight, Shuck Dieback, Powdery Mildew, Downy Spot, Fungal Leaf Scorch, and other diseases can be damaging.
Insects are a problem in Texas.
The Pecan Nut Casebearer, Pecan Weevil, Yellow Aphid, Black Aphid, Stink Bug, Hickory Shuckworm, and others need to be monitored closely to determine if insecticide sprays are needed for economic control. Harvesting pecans in Texas is a very difficult and demanding task. Pecans should be harvested, cleaned, dried, sacked, and sold before December 7 each year to maintain kernel quality and obtain a good price. This short seven week harvest season may have at least 14 days of delay because of rain. Some years rain and cold occur, making harvest difficult even for the strongest.