Regional and harvest date relationships with storage quality of Honeycrisp apples
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1 Regional and harvest date relationships with storage quality of Honeycrisp apples Chris Watkins and Jackie Nock Department of Horticulture Cornell University Ithaca, NY 1485
2 Today s presentation Background Maturity Fruit drop and yield Storage quality Storage disorders Conclusions
3 Cummulative fruit drop (%) (aminoethoxyvinylglycine; AVG) (1-MCP) Honeycrisp untreated 1 13-Sep 2-Sep 27-Sep 4-Oct 11-Oct 18-Oct 25-Oct 1-Nov
4 Honeycrisp the profitable but 1. Highly susceptible to a number of serious physiological problems in air storage Bitter pit Soft scald Soggy breakdown Senescent breakdown Greasiness Poorly understood, e.g. wrinkling difficult child!
5 2. Fruit should be conditioned at 5F for 7 days to reduce risk of soft scald development But, conditioning aggravates bitter pit in an already susceptible variety
6 Regional and harvest date effects Two year trial (29; 21) Untreated,, 3 harvest dates (commercial pickers), but variable among regions because of color issues Plus and minus Smartfresh after conditioning (5 o F for 7 days) Air (38 o F) and CA (3% O 2, 1.5% CO 2 ) (38 o F) 3 and 6 months storage plus 4 days at 68 o F
7 AT HARVEST - MATURITY EFFECTS OF REGION AND PREHARVEST TREATMENT
8 IEC (ppm): Hudson Valley IEC (ppm): Western NY IEC (ppm): Champlain Control 4 Control 4 Control H 1 H2 H3 H1 H2 H3 H1 H2 H Starch index: HV Starch index: WNY Starch index: Champlain Control Control Control H 1 H2 H3 H1 H2 H3 H1 H2 H3 4436
9 SSC (%): HV SSC (%): WNY SSC (%): Champlain Control Control Control H 1 H2 H3 H1 H2 H3 H1 H2 H TA (%): HV TA (%): WNY TA (%) Champlain Control.3 Control.3 Control H 1 H2 H3 H1 H2 H3 H1 H2 H
10 Effect of preharvest treatment on the starch index [21] Preharvest trt HV WNY Champlain Untreated Significance NS *** ***
11 Effect of preharvest treatment on acidity[21] Preharvest trt HV WNY Champlain Untreated Significance NS NS NS
12 Effect of preharvest treatment on firmness (lb-f) [21] Preharvest trt HV WNY Champlain Untreated Significance NS * NS
13 Summary and inhibit ethylene production of Honeycrisp apples sometimes starch sometimes firmness Effects on other maturity indices are small or absent Many factors affecting acidity and starch that are not simply growing region related
14 AT HARVEST YIELD AND DROP EFFECTS OF REGION AND PREHARVEST TREATMENT
15 HUDSON VALLEY (21) Accumulated drop (%) Control Aug 29-Aug 3-Sep 8-Sep 13-Sep
16 CHAMPLAIN (21) Accumulated drop (%) Control Sep 8-Sep 13-Sep 18-Sep 23-Sep 28-Sep 3-Oct 8-Oct
17
18 Summary and control drop of Honeycrisp apples, but can have undesirable effects on fruit color at the rates used Seriousness of red color inhibition depends on growing climate More work needed on rates
19 STORAGE EFFECTS OF PREHARVEST TREATMENT AND STORAGE TYPE ON FIRMNESS, SSC AND TA
20 Firmness (lb-f) WNY: Firmness (lb-f) in air storage Effect of preharvest treatment Untrt Storage time (months)
21 SSC (%) WNY: SSC (%) in air storage Effect of preharvest treatment Untrt Storage time (months)
22 TA (%) WNY: Acidity (%) in air storage Effect of preharvest treatment Untrt Storage time (months)
23 Firmness (lb-f) WNY: Firmness (lb-f) in air storage Effect of SmartFresh control SmartFresh Storage time (months)
24 SSC (%) WNY: SSC (%) in air storage Effect of SmartFresh Control SmartFresh Storage time (months)
25 TA (%) WNY: Acidity (%) in air storage Effect of SmartFresh Conrol SmartFesh Storage time (months)
26 Champlain summary: Air vs CA 3 months 6 months Air CA Air CA Firmness (lb-f) SSC (%) *** TA (%) ***
27 Champlain summary: Untrt vs SF (air) Untreated SF Untreated SF 3 mo 3 mo 6 mo 6 mo Firmness (lb-f) SSC (%) * TA (%) ***
28 Champlain summary: Untrt vs SF (CA) Untreated SmartFresh Untreated SmartFresh 3 mo 3 mo 6 mo 6 mo Firmness (lb-f) SSC (%) TA (%)
29 Summary Little consistent effect of preharvest treatments on firmness, SSC and acidity CA superior to air storage, especially acidity Air plus SmartFresh is roughly equivalent to CA storage Little effect of SmartFresh in CA
30 STORAGE EFFECTS OF PREHARVEST TREATMENT AND STORAGE TYPE ON DISORDERS
31 Bitter pit Effect of preharvest trt (storage removals combined) Air storage CA storage 4 3 Untrt 4 3 Untrt HV WNY Champlain HV WNY Champlain
32 Soft scald (air) Champlain: affected by harvest date only: % at H1, 12% at H2 (despite conditioning) HV and WNY: negligible (<1%)
33 Greasiness in air storage Effect of harvest date 3 months 6 months H1 H2 H H1 H2 H3
34 Greasiness in air storage Effect of SmartFresh 3 months 6 months 1 8 Control Smartfresh 1 Control SmartFresh HV WNY Champlain 6 HV WNY Champlain
35 Greasiness in air storage Effect of preharvest treatment Often significantly lower in and trts, but not commercially meaningful in timeframes tested Lower incidence resulted in best SF effect (Champlain, H1 and 3 months air storage) control SmartFresh Untrt Champlain harvest 1; 3 months air storage
36 Greasiness in CA storage Effect of harvest date 3 months 6 months H1 H2 H H1 H2 H3
37 Greasiness in CA storage Effect of SmartFresh 3 months Control Smartfresh 6 months Control SmartFresh HV WNY Champlain HV WNY Champlain
38 Internal CO 2 injury (CA only) Effect of preharvest trt 2 1 Control HV WNY Champlain
39 Conclusions Regional effects on HC storage quality are high, and marketing plans should reflect this reality More work is required on the effects of rates and timing, especially in southern regions SmartFresh recommended for longer term air storage can help maintain higher SSC and TA, and reduce greasiness for short term storage CA can maintain TA, reduce pit and greasiness, but not recommended because of risk of carbon dioxide injury [ and can aggravate].
40 The people and the funding The people Mike Fargione Ron Jones Randi Wintamute Liza White The growers JD Fowler Jeff Crist Seth Forrence Funding NY Farm Viability Institute NY Apple Research Development Program AgroFresh Inc. Visiting scholars and students Yanping Ma Inkyu Kang Yifan Cheng Valent BioSciences Federal Funds Project NE136
41 THANKS AND QUESTIONS
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