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Carbon Balance Model Tables for May 5 to 19

Posted: May 16, 2012

This will be the last posting of the Cornell MaluSim carbon balance tables. Most areas of the state are now beyond the effective thinning fruit size. As you can see all areas are in a carbon surplus meaning fruit is being adequately supplied with carbon and should not respond to thinners. As mentioned yesterday by Jim Schupp, there seems to be a heavy fruit drop in south-central and southeastern PA in response to a carbon deficit back the first week of May.

This has truly been a trying thinning season with numerous frost or near frost events. Damaged spur leaves undoubtedly also affected tree response to thinners. In my orchards I observed spur leaves that were “crinkled” by frost exposure and even some spur leaves with black and brown necrotic tissue. New growth also showed discoloration due to frosts. As Michigan growers observed, we saw secondary and now even tertiary bloom on trees. In some parts of the state, peaches which had set fruit in early April were completely wiped out from the April 28 – 29th frost.

Dr. Rob Crassweller, Penn State Professor of Pomology

Orchard blocks without a crop this year can expect a heavy bloom next year which will make thinning again a challenge. While we had some problems running the carbon balance model this year due to inexperience we hope to be able to repeat the procedure next spring under more normal situations. Due to the frosty conditions and early spring, this year was a learning experience and next year will hopefully be a smoother operation.

Northern Allegheny County

Date Daily C Balance Total Demand Sup/Dem/Bal
5-May 66.86 66.33 0.53
6-May 92.41 58.26 34.16
7-May 74.52 57.81 16.71
8-May 45.97 68.85 -22.88
9-May 70.04 82.60 -12.57
10-May 74.18 97.35 -23.17
11-May 107.10 64.96 42.14
12-May 102.92 40.56 62.36
13-May 69.14 24.70 44.44
14-May 50.21 20.01 30.21
15-May 80.59 19.43 61.17
16-May 104.45 29.71 74.74
17-May 113.66 41.70 71.97
18-May 113.36 52.35 61.00
19-May 112.37 59.05 53.33

Southwestern Adams County

Date Daily C Balance Total Demand Sup/Dem/Balance
5-May 76.43 83.6 -7.17
6-May 45.28 83.79 -38.51
7-May 47.31 72.62 -25.31
8-May 49.67 54.6 -4.93
9-May 85.26 49.45 35.81
10-May 96.69 59.85 36.84
11-May 114.13 62.29 51.84
12-May 115.39 64.37 51.02
13-May 100.18 74.15 26.03
14-May 45.99 65.13 -19.13
15-May 75.07 41.63 33.45
16-May 113.06 30.03 83.03
17-May 113.15 27.18 85.96
18-May 119.77 38.29 81.47
19-May 119.87 44.3 75.57

Juniata County

Date Daily C Balance Total Demand Sup/Dem/Bal
5-May 31.19 19.22 11.97
6-May 25.93 23.97 1.96
7-May 21.00 25.92 -4.92
8-May 21.62 28.47 -6.85
9-May 50.58 24.34 26.23
10-May 49.96 19.15 30.81
11-May 66.07 20.80 45.28
12-May 71.21 26.08 45.13
13-May 65.74 33.54 32.20
14-May 30.61 19.48 11.13
15-May 45.92 28.84 17.08
16-May 78.31 30.21 48.10
17-May 86.67 33.63 53.04
18-May 90.88 34.48 56.40
19-May 89.80 36.78 53.02

Southeast Berks County

Date Daily C Balance Total Demand Sup/Dem/Bal
5-May 57.44 104.76 -47.33
6-May 44.36 89.65 -45.29
7-May 61.82 65.01 -3.20
8-May 62.41 61.67 0.74
9-May 75.64 69.62 6.02
10-May 91.66 65.83 25.83
11-May 109.47 67.16 42.30
12-May 110.17 77.84 32.33
13-May 108.53 62.27 46.26
14-May 53.10 43.01 10.09
15-May 61.94 31.49 30.44
16-May 112.73 32.02 80.70
17-May 121.18 40.04 81.14
18-May 123.93 43.11 80.83
19-May 118.95 45.54 73.41

Erie County

Date DailyCBal Total Demand Sup/Dem/Bal
5-May 82.72 98.31 -15.58
6-May 102.80 75.94 26.87
7-May 61.55 39.39 22.16
8-May 61.49 40.20 21.28
9-May 91.14 62.91 28.23
10-May 86.41 79.37 7.04
11-May 111.77 71.89 39.88
12-May 109.64 37.33 72.32
13-May 96.16 24.70 71.46
14-May 66.03 18.57 47.46
15-May 94.35 17.84 76.50
16-May 96.61 19.40 77.22
17-May 106.71 22.24 84.46
18-May 112.91 27.68 85.23
19-May 107.24 35.09 72.15