Botryodiplodia rot: Botryodiplodia theobromae

Symptoms:

• It causes considerable damage during storage and transit.
• The affected fruits shoe brownish discolouration mostly at the stem-end which gradually proceeds downwards in an irregular wavy-manner.
• In advanced stages, numerous, small pycnidia are produced over the entire surface of the fruit.
• The rot is soft and watery.
• Maximum decay occurs at 30°C.

Management:

• Careful handling, storage at 150C and quick disposal can minimize the losses.

Image source:

http://midh.gov.in/technology/IPM-GUAVA-Revised-Sept2011.pdf