Physiological disorders of peachesLara Jaber

Supervision By:Dr. Nihad Alsmairat

Physiological disorders of peaches

Peaches ripen and deteriorate rapidly at room temperature for that process occurs storage to reduce the symptoms of disorders and extend the life of the crop to ensure that it reaches the required quality for the consumer.

Types of physiological disorders of peaches

-Split Pit

Internal Breakdown -

-Skin Burning

Split Pit

•Peaches with split pit are flattened at end of the

fruit. Often symptoms are not seen until the fruit is cut open. The pit is torn apart or split along the dorsal-ventral suture .

•more fertilizer and water have more fruit with

split pit.

The following is a brief summary of steps growers should consider to minimize shattered pit-gumming problems.

(1 )Avoid excessive nitrogen applications, especially close to

harvest time .(2 )Use stricter packinghouse grading for problem varieties to

remove questionable or misshapen fruit. These fruit are most at-risk for split pits .

Internal Breakdown

Symptoms include:-Flesh browning

-Lack of flavor -Failure to ripen

-red pigment accumulation -black pit cavity)bleeding(

disorders that occur during prolonged cold storage

Skin Burning

Affected skin burns by several factors including: the excess storage and cooling

inappropriate, PH

-The peaches were stored for 1 month at 0 °C and 90–95 % RH under the CA conditions given above, and then they were kept at room conditions )20–23 °C, 60–65 % RH( for 4 days in order to determine their maturity situations

-PH effect on peaches

7.0 8.07.5 8.5 9.0

Brushing And Washing

Free Chlorine 50-100ppm in PH 8.3

Tips to Prevent Skin Burning Disorder

-Reduce physical damage during harvesting-postharvest handling.

-Control your pH during washing-brushing.

--Use room cooling )R.C.( rather than forced air cooling )F.A.C(

-Reduce fruit water losses during harvesting-postharvest handling

http://www.ent.uga.edu/peach/peachhbk/harvest/splitpit.pdf

http://postharvest.ucdavis.edu/produce_information/Fruit_Physiological_Disorders/Stonefruit_InternalBreakdown/

http://hos.ufl.edu/sites/default/files/faculty/maolmstead/Peach%20Postharvest%20Disorders%20-%20Crisosto.pdf

References