Downy Spot
Pale green to white spots under the leaves. Control by spraying the complete tree several times during the growing season.
Pecan Scab Disease
Black spots on the leaves and pecans. This is a fungus that will devastate a pecan harvest. Best control is spraying the complete tree several times during the growing season.
Pecan Weevils
Females drill a hole in the soft growing pecan to lay her eggs. The larva grows and chews a hole through the hard pecan shell. Best control is spraying every week from August 15th to September 15th for three years.
Powdery Mildew
White, dusty powder on the pecan. Control is spraying the complete tree several times during the growing season.
Stink Bugs
Punctures nuts both before and after shell hardening. Either the pecan falls off prematurely or black spots appear on the mature pecan meat.
Tent Caterpillars
They show up on the tree late summer. However you have to control them in the spring, March and April. Does not hurt the pecan harvest but makes the tree look unhealthy.
Twig Girdlers
Girdles eat twigs and small branches in September.