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Output from uspest.org/wea insect degree-day/phenology model program:
Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================
Model species/general links: peach twig borer [stone fruits]
Type: insect
Model source/other links: 2007 USU Ext.
Calculation method: single sine
Lower threshold: 50 degrees Fahrenheit
Upper threshold: 88 degrees Fahrenheit
Directions for starting/BIOFIX: 1st consistent capture of moths in pheromone traps
(ca. 405 DD after Mar 1 or Jan 1 in warm climates)
Starting/BIOFIX date: 4 15
Ending date: 9 30
Model validation status: requires local validation
Region of known use: used in NW USA
==============================EVENTS TABLE================================
1. 55 DDs after biofix: OW gen. ca. 1st egg laying
2. 220 DDs after biofix: 1st gen. ca. 1st egg hatch, OW 49% male flight
3. 350 DDs after biofix: 1st gen. ca. 14% egg hatch (time to sample young larvae), OW 87% male flight
4. 500 DDs after biofix: 1st gen. ca. 63% egg hatch, OW 98% male flight
5. 684 DDs after biofix: 1st gen. ca. 96% egg hatch, earliest pupation
6. 1080 DDs after biofix: 2nd gen. ca. 1st egg hatch, 1st gen. 19% male flight
7. 1280 DDs after biofix: 2nd gen. ca. 13% egg hatch, 1st gen. 66% male flight
8. 1500 DDs after biofix: 2nd gen. ca. 61% egg hatch, 1st gen. 96% male flight
9. 1760 DDs after biofix: 2nd gen. ca. 96% egg hatch, 2nd gen. 1st male flight
10. 2240 DDs after biofix: 3rd gen. ca. 14% egg hatch, 2nd gen. 56% male flight
11. 2580 DDs after biofix: 3rd gen. ca. 73% egg hatch, 2nd gen. 96% male flight
12. 2820 DDs after biofix: 3rd gen. ca. 96% egg hatch, 3rd gen. 4% male flight
13. 3180 DDs after biofix: 4th gen. ca. 13% egg hatch (warmer climates only)
==============================MODEL OUTPUT================================
Weather station: 2016 MF22700 MILTON_FREEWATER_GROWERS Blue Mt Cherry OR Lat:45.9567 Long:-118.4367 Elev:869
mn day max min precip DD50 CUMDD50 event
-- --- ----- ----- ------ ---- ------- -------
5 26 69.40 52.40 0.00 10.90 10.9 * START *
5 27 66.90 49.00 0.00 8.05 19.0
5 28 71.90 47.50 0.00 10.04 29.0
5 29 75.60 54.60 0.00 15.10 44.1
5 30 73.40 47.40 0.00 10.75 54.8
5 31 81.30 44.70 0.00 13.87 68.7 OW gen. ca. 1st egg laying
6 1 82.40 51.40 0.00 16.90 85.6
6 2 76.80 64.20 0.00 20.50 106.1
6 3 84.70 57.50 0.00 21.10 127.2
6 4 90.90 52.90 0.00 21.56 148.8
6 5 92.60 55.50 0.00 23.35 172.1
6 6 99.80 64.50 0.00 29.15 201.3 Vx
6 7 97.80 64.50 0.00 28.82 230.1 1st gen. ca. 1st egg hatch, OW 49% male flight
6 8 89.90 69.60 0.00 29.50 259.6
6 9 79.70 59.60 0.00 19.65 279.2
6 10 69.80 53.00 0.06 11.40 290.6
6 11 71.50 50.90 0.00 11.20 301.8
6 12 81.40 48.40 0.00 15.05 316.9
6 13 75.80 52.90 0.00 14.35 331.2
6 14 70.90 51.20 0.00 11.05 342.3
6 15 71.50 48.20 0.00 10.06 352.4 1st gen. ca. 14% egg hatch (time to sample young larvae), OW 87% male flight
6 16 70.60 49.00 0.02 9.89 362.2
6 17 78.20 46.50 0.00 12.85 375.1
6 18 68.00 54.60 0.14 11.30 386.4
6 19 76.50 43.90 0.00 11.34 397.7
6 20 81.50 46.80 0.00 14.57 412.3 Vx
6 21 80.00 56.20 0.00 18.10 430.4
6 22 84.30 50.20 0.00 17.25 447.7
6 23 79.00 61.30 0.00 20.15 467.8
6 24 71.00 52.90 0.02 11.95 479.8
6 25 79.60 52.40 0.00 16.00 495.8
6 26 87.00 50.10 0.00 18.55 514.3 1st gen. ca. 63% egg hatch, OW 98% male flight
6 27 89.30 52.10 0.00 20.60 534.9
6 28 90.70 63.60 0.00 26.78 561.7
6 29 88.30 60.80 0.00 24.54 586.2
6 30 87.90 63.50 0.00 25.70 611.9
7 1 86.70 58.50 0.00 22.60 634.5
7 2 88.20 62.20 0.00 25.19 659.7
7 3 85.60 67.70 0.00 26.65 686.4 1st gen. ca. 96% egg hatch, earliest pupation
7 4 81.70 56.00 0.00 18.85 705.2
7 5 78.30 55.70 0.00 17.00 722.2
7 6 77.70 59.70 0.00 18.70 740.9
7 7 76.80 55.00 0.00 15.90 756.8
7 8 71.50 59.00 0.15 15.25 772.1
7 9 76.00 56.50 0.15 16.25 788.3
7 10 65.70 56.60 0.00 11.15 799.5
7 11 76.30 58.20 0.00 17.25 816.7
7 12 75.00 57.30 0.04 16.15 832.9
7 13 80.30 59.90 0.00 20.10 853.0
7 14 84.70 54.10 0.00 19.40 872.4
7 15 79.30 57.00 0.00 18.15 890.5
7 16 80.30 59.70 0.00 20.00 910.5
7 17 84.80 56.00 0.00 20.40 930.9
7 18 78.90 58.60 0.00 18.75 949.7
7 19 78.00 60.10 0.00 19.05 968.7
7 20 79.80 60.00 0.00 19.90 988.6
7 21 87.70 53.40 0.00 20.55 1009.2
7 22 80.00 64.10 0.00 22.05 1031.2
7 23 79.80 56.20 0.00 18.00 1049.2
7 24 86.10 52.20 0.00 19.15 1068.4
7 25 96.70 57.90 0.00 25.51 1093.9 Vx 2nd gen. ca. 1st egg hatch, 1st gen. 19% male flight
7 26 90.00 69.00 0.00 29.24 1123.1
7 27 89.60 65.90 0.00 27.57 1150.7
7 28 92.10 63.60 0.00 27.18 1177.9
7 29 94.00 64.10 0.00 27.88 1205.7
7 30 92.10 70.00 0.00 30.29 1236.0
7 31 86.10 61.60 0.00 23.85 1259.9
8 1 90.60 57.30 0.00 23.64 1283.5 Vx 2nd gen. ca. 13% egg hatch, 1st gen. 66% male flight
8 2 80.80 58.10 0.00 19.45 1303.0
8 3 79.80 57.60 0.00 18.70 1321.7
8 4 89.40 52.60 0.00 20.88 1342.6
8 5 90.90 55.20 0.00 22.70 1365.3
8 6 88.90 62.20 0.00 25.48 1390.7
8 7 84.70 58.20 0.00 21.45 1412.2
8 8 77.90 55.00 0.00 16.45 1428.6
8 9 72.80 54.90 0.00 13.85 1442.5
8 10 84.60 57.10 0.00 20.85 1463.3
8 11 92.80 52.10 0.00 21.74 1485.1
8 12 91.70 54.80 0.00 22.75 1507.8 2nd gen. ca. 61% egg hatch, 1st gen. 96% male flight
8 13 91.80 55.20 0.00 22.97 1530.8
8 14 91.00 60.90 0.00 25.54 1556.3
8 15 95.70 60.70 0.00 26.63 1583.0 Vx
8 16 90.80 59.90 0.00 24.99 1608.0
8 17 88.90 62.40 0.00 25.58 1633.5
8 18 89.10 60.00 0.00 24.46 1658.0
8 19 85.40 56.20 0.00 20.80 1678.8
8 20 90.00 55.20 0.00 22.40 1701.2
8 21 92.20 64.00 0.00 27.40 1728.6
8 22 77.50 55.60 0.00 16.55 1745.1
8 23 80.80 51.20 0.00 16.00 1761.1 2nd gen. ca. 96% egg hatch, 2nd gen. 1st male flight
8 24 86.90 52.20 0.00 19.55 1780.7 Vx
8 25 86.60 50.90 0.00 18.75 1799.4
8 26 88.30 51.50 0.00 19.89 1819.3
8 27 90.90 70.00 0.00 29.98 1849.3
8 28 89.10 63.80 0.00 26.35 1875.7 Vx
8 29 91.90 53.80 0.00 22.31 1898.0 Vx
8 30 77.70 59.70 0.00 18.70 1916.7
8 31 82.60 57.60 0.00 20.10 1936.8
9 1 76.60 58.90 0.00 17.75 1954.5
9 2 74.00 53.30 0.02 13.65 1968.2
9 3 71.70 56.90 0.00 14.30 1982.5
9 4 73.10 44.60 0.00 9.87 1992.4
9 5 74.70 50.80 0.00 12.75 2005.1 Vx
9 6 65.70 56.40 0.07 11.05 2016.2
9 7 77.50 55.90 0.00 16.70 2032.9 Vx
9 8 75.70 57.80 0.00 16.75 2049.6
9 9 76.10 49.90 0.00 13.00 2062.6
9 10 85.50 46.10 0.00 16.33 2078.9
9 11 75.70 56.00 0.00 15.85 2094.8 Vx
9 12 72.20 43.70 0.00 9.24 2104.0
9 13 71.30 37.80 0.00 7.80 2111.8
9 14 77.50 45.10 0.00 12.12 2123.9
9 15 82.80 48.10 0.00 15.64 2139.6
9 16 87.40 50.20 0.00 18.80 2158.4
9 17 72.80 64.30 0.00 18.55 2176.9
9 18 73.00 59.90 0.01 16.45 2193.4
9 19 68.20 58.10 0.00 13.15 2206.5 Vx
9 20 71.00 47.10 0.00 9.48 2216.0
9 21 67.30 40.80 0.00 6.44 2222.5
9 22 58.30 47.60 0.02 3.44 2225.9
9 23 70.00 52.70 0.00 11.35 2237.2
9 24 70.20 51.10 0.00 10.65 2247.9 3rd gen. ca. 14% egg hatch, 2nd gen. 56% male flight
9 25 80.70 48.10 0.00 14.60 2262.5
9 26 79.70 46.80 0.00 13.68 2276.2
9 27 81.70 58.00 0.00 19.85 2296.0
9 28 73.80 49.70 0.00 11.76 2307.8
9 29 76.00 47.70 0.02 12.13 2319.9
9 30 74.80 53.40 0.00 14.10 2334.0
Extended Seasonal Forecast: NOAA NMME 7-month 1910 MF22700 PRISM_rev1_4km 2012-2021
peach twig borer model - 2007 USU Ext.Location: 2016 MF22700 Blue Mt Cherry Extended Seasonal Forecast: NOAA NMME | Date | DDs | Event |
| 5-31-16 | 69 | OW gen. ca. 1st egg laying |
| 6-7-16 | 230 | 1st gen. ca. 1st egg hatch, OW 49% male flight |
| 6-15-16 | 352 | 1st gen. ca. 14% egg hatch (time to sample young larvae), OW 87% male flight |
| 6-26-16 | 514 | 1st gen. ca. 63% egg hatch, OW 98% male flight |
| 7-3-16 | 686 | 1st gen. ca. 96% egg hatch, earliest pupation |
| 7-25-16 | 1094 | 2nd gen. ca. 1st egg hatch, 1st gen. 19% male flight |
| 8-1-16 | 1284 | 2nd gen. ca. 13% egg hatch, 1st gen. 66% male flight |
| 8-12-16 | 1508 | 2nd gen. ca. 61% egg hatch, 1st gen. 96% male flight |
| 8-23-16 | 1761 | 2nd gen. ca. 96% egg hatch, 2nd gen. 1st male flight |
| 9-24-16 | 2248 | 3rd gen. ca. 14% egg hatch, 2nd gen. 56% male flight |
![degree-day graph of peach twig borer [stone fruits] 2007 USU Ext.](/cgi-bin/ddplotj.pl?87194)
