White rot: Botryosphaeria dothidea
Symptoms:
- One type -rot the fruit from the inside outward.
- Entire apple becomes soft but retains its shape and takes on a light brown color.
- Second type - white rot is small, brown, circular spots on the fruit, similar to bitter rot. The spots are softer than black rot and more cupped-shaped than bitter rot
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White rot |
Dark brown spot |
Management:
- Eliminating dead wood, including current season's fire blighted twigs, and avoiding stub cuts is important for disease prevention.
- Make pruning cuts properly and cut just outside of the bark ridge and collar tissue to promote rapid wound closure and healing.
Image source:
http://www.uky.edu/Ag/kpn/kpn_09/pn_090915.html,
http://ipm.illinois.edu/ifvn/volume10/frveg1015.html,
http://www.insectimages.org/browse/detail.cfm?imgnum=1496071 |