Troubleshooting
Pecan 'Kiowa' problems — and how to fix them
Pecan 'Kiowa' (Carya illinoinensis 'Kiowa') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Pecan scab
The major disease, caused by Venturia effusa, blackening leaves and nut shucks and ruining the crop in humid summers. 'Kiowa' is scab-susceptible, so favour drier climates or a fungicide schedule.
Poor pollination
'Kiowa' is protogynous (type II); without an overlapping type-I (protandrous) pollinator such as 'Desirable', nut set is poor. Plant a compatible second cultivar.
Zinc deficiency (rosette)
Shows as small, crinkled leaves and rosetted shoot tips. Common on high-pH soils; correct with foliar or soil zinc applications.
Alternate bearing
Heavy crops are often followed by a light year. Mitigate with consistent water and nutrition and, where practical, by managing crop load.
Prevent pecan 'kiowa' problems before they start
Most pecan 'kiowa' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pecan 'kiowa' in general rather than its problems? Read the full pecan 'kiowa' care guide — light, water, soil and feeding.
Pecan 'Kiowa' problems — FAQ
Why is my pecan 'kiowa' pecan scab?
The major disease, caused by Venturia effusa, blackening leaves and nut shucks and ruining the crop in humid summers. 'Kiowa' is scab-susceptible, so favour drier climates or a fungicide schedule.
Why is my pecan 'kiowa' poor pollination?
'Kiowa' is protogynous (type II); without an overlapping type-I (protandrous) pollinator such as 'Desirable', nut set is poor. Plant a compatible second cultivar.
Why is my pecan 'kiowa' zinc deficiency (rosette)?
Shows as small, crinkled leaves and rosetted shoot tips. Common on high-pH soils; correct with foliar or soil zinc applications.
Why is my pecan 'kiowa' alternate bearing?
Heavy crops are often followed by a light year. Mitigate with consistent water and nutrition and, where practical, by managing crop load.