Online Phenology Models and Degree-day Calculator
immaturedamagepupaadult
orange tortrix (mild winter) [small fruit]
insect model of Knight (1988)


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: orange tortrix (mild winter) [small fruit] Type: insect Model source/other links: Knight (1988) Calculation method: single sine Lower threshold: 41 degrees Fahrenheit Setting upper threshold to: 130 F (default) Directions for starting/BIOFIX: calendar date No starting/BIOFIX date, set to: default date 1 1 No ending date, set to: default date 12 31 Model validation status: partly validated Region of known use: Pacific Northwest ==============================EVENTS TABLE================================ 1. 850 DDs after biofix: peak pheromone trap catch 2. 950 DDs after biofix: peak female adult emergence 3. 1000 DDs after biofix: peak egg laying 4. 1270 DDs after biofix: peak egg hatch 5. 2070 DDs after biofix: peak in density large larvae ==============================MODEL OUTPUT================================ Weather station: 2018 CYXX CANADA Abbotsford: B. C. BC Lat:49.0331 Long:-122.3667 Elev:177 mn day max min precip DD41 CUMDD41 event -- --- ----- ----- ------ ---- ------- ------- 1 1 30.20 21.20 0.00 0.00 0.0 * START * 1 2 33.80 26.60 0.00 0.00 0.0 1 3 39.20 28.40 0.00 0.00 0.0 1 4 37.40 32.00 0.00 0.00 0.0 1 5 39.20 35.60 0.00 0.00 0.0 1 6 42.80 37.40 0.00 0.46 0.5 1 7 39.20 35.60 0.00 0.00 0.5 1 8 42.80 37.40 0.00 0.46 0.9 1 9 44.60 39.20 0.00 1.36 2.3 1 10 44.60 39.20 0.00 1.36 3.6 1 11 37.40 32.00 0.00 0.00 3.6 1 12 33.80 32.00 0.00 0.00 3.6 1 13 41.00 33.80 0.00 0.00 3.6 1 14 53.60 37.40 0.00 5.24 8.9 1 15 50.00 39.20 0.00 3.92 12.8 1 16 53.60 41.00 0.00 6.30 19.1 1 17 55.40 41.00 0.00 7.20 26.3 1 18 51.80 42.80 0.00 6.30 32.6 1 19 44.60 41.00 0.00 1.80 34.4 1 20 46.40 39.20 0.00 2.19 36.6 1 21 51.80 41.00 0.00 5.40 42.0 1 22 46.40 37.40 0.00 1.91 43.9 1 23 39.20 35.60 0.00 0.00 43.9 1 24 44.60 37.40 0.00 1.15 45.0 1 25 41.00 33.80 0.00 0.00 45.0 1 26 42.80 35.60 0.00 0.39 45.4 1 27 41.00 35.60 0.00 0.00 45.4 1 28 45.30 33.70 0.00 1.16 46.6 Hx Hn 1 29 50.00 39.20 0.00 3.92 50.5 1 30 46.40 39.20 0.00 2.19 52.7 1 31 42.80 35.60 0.00 0.39 53.1 2 1 41.00 35.60 0.00 0.00 53.1 2 2 51.80 39.20 0.00 4.79 57.9 2 3 50.00 46.40 0.00 7.20 65.1 2 4 53.60 44.60 0.00 8.10 73.2 2 5 48.20 44.60 0.00 5.40 78.6 2 6 46.40 42.80 0.00 3.60 82.2 2 7 50.00 44.60 0.00 6.30 88.5 2 8 53.60 42.80 0.00 7.20 95.7 2 9 41.00 35.60 0.00 0.00 95.7 2 10 41.00 28.40 0.00 0.00 95.7 2 11 44.60 30.20 0.00 0.78 96.5 2 12 41.00 30.20 0.00 0.00 96.5 2 13 39.20 24.80 0.00 0.00 96.5 2 14 37.40 32.00 0.00 0.00 96.5 2 15 39.20 30.20 0.00 0.00 96.5 2 16 46.40 35.60 0.00 1.72 98.2 2 17 46.40 32.00 0.00 1.46 99.6 2 18 33.80 26.60 0.00 0.00 99.6 2 19 33.80 24.80 0.00 0.00 99.6 2 20 47.40 19.40 0.00 1.33 101.0 Hx 2 21 30.20 23.00 0.00 0.00 101.0 2 22 37.40 23.00 0.00 0.00 101.0 2 23 30.20 23.00 0.00 0.00 101.0 2 24 37.40 28.40 0.00 0.00 101.0 2 25 42.80 33.80 0.00 0.35 101.3 2 26 39.20 32.00 0.00 0.00 101.3 2 27 42.80 35.60 0.00 0.39 101.7 2 28 42.80 35.60 0.00 0.39 102.1 3 1 46.40 35.60 0.00 1.72 103.8 3 2 41.00 33.80 0.00 0.00 103.8 3 3 44.60 32.00 0.00 0.84 104.7 3 4 41.00 32.00 0.00 0.00 104.7 3 5 44.60 32.00 0.00 0.84 105.5 3 6 50.00 33.80 0.00 3.04 108.6 3 7 50.00 32.00 0.00 2.86 111.4 3 8 46.40 39.20 0.00 2.19 113.6 3 9 50.00 37.40 0.00 3.54 117.2 3 10 55.40 32.00 0.00 5.17 122.3 3 11 60.80 35.60 0.00 8.29 130.6 3 12 66.20 41.00 0.00 12.60 143.2 3 13 59.00 46.40 0.00 11.70 154.9 3 14 46.40 41.00 0.00 2.70 157.6 3 15 55.40 33.80 0.00 5.43 163.0 3 16 57.20 32.00 0.00 5.98 169.0 3 17 53.60 32.00 0.00 4.39 173.4 3 18 50.00 39.20 0.00 3.92 177.3 3 19 50.00 35.60 0.00 3.26 180.6 3 20 50.00 35.60 0.00 3.26 183.9 3 21 59.00 37.40 0.00 7.83 191.7 3 22 50.00 35.60 0.00 3.26 195.0 3 23 44.60 35.60 0.00 1.01 196.0 3 24 42.80 35.60 0.00 0.39 196.4 3 25 48.20 28.40 0.00 1.92 198.3 3 26 44.60 41.00 0.00 1.80 200.1 3 27 55.40 42.80 0.00 8.10 208.2 3 28 51.80 42.80 0.00 6.30 214.5 3 29 46.40 42.80 0.00 3.60 218.1 3 30 53.60 41.00 0.00 6.30 224.4 3 31 55.40 35.60 0.00 5.73 230.1 4 1 48.20 33.80 0.00 2.29 232.4 4 2 50.00 30.20 0.00 2.71 235.1 4 3 48.20 39.20 0.00 3.05 238.2 4 4 50.00 41.00 0.00 4.50 242.7 4 5 48.20 42.80 0.00 4.50 247.2 4 6 60.80 46.40 0.00 12.60 259.8 4 7 57.20 48.20 0.00 11.70 271.5 4 8 51.80 46.40 0.00 8.10 279.6 4 9 59.00 46.40 0.00 11.70 291.3 4 10 57.20 46.40 0.00 10.80 302.1 4 11 53.60 42.80 0.00 7.20 309.3 4 12 51.80 39.20 0.00 4.79 314.1 4 13 51.80 41.00 0.00 5.40 319.5 4 14 50.00 44.60 0.00 6.30 325.8 4 15 55.40 42.80 0.00 8.10 333.9 4 16 48.20 42.80 0.00 4.50 338.4 4 17 51.80 42.80 0.00 6.30 344.7 4 18 59.00 39.20 0.00 8.33 353.0 4 19 59.00 37.40 0.00 7.83 360.8 4 20 59.00 42.80 0.00 9.90 370.7 4 21 55.40 46.40 0.00 9.90 380.6 4 22 60.80 35.60 0.00 8.29 388.9 4 23 69.80 41.00 0.00 14.40 403.3 4 24 73.40 42.80 0.00 17.10 420.4 4 25 78.80 46.40 0.00 21.60 442.0 4 26 80.60 51.80 0.00 25.20 467.2 4 27 60.80 48.20 0.00 13.50 480.7 4 28 53.60 48.20 0.00 9.90 490.6 4 29 53.60 46.40 0.00 9.00 499.6 4 30 55.40 48.20 0.00 10.80 510.4 5 1 60.80 48.20 0.00 13.50 523.9 5 2 66.20 42.80 0.00 13.50 537.4 5 3 69.80 48.20 0.00 18.00 555.4 5 4 57.20 50.00 0.00 12.60 568.0 5 5 71.60 42.80 0.00 16.20 584.2 5 6 77.00 55.40 0.00 25.20 609.4 5 7 69.80 53.60 0.00 20.70 630.1 5 8 80.60 50.00 0.00 24.30 654.4 5 9 64.40 53.60 0.00 18.00 672.4 5 10 59.00 48.20 0.00 12.60 685.0 5 11 66.20 48.20 0.00 16.20 701.2 5 12 75.20 48.20 0.00 20.70 721.9 5 13 82.40 48.20 0.00 24.30 746.2 5 14 84.20 55.40 0.00 28.80 775.0 5 15 73.40 53.60 0.00 22.50 797.5 5 16 68.00 53.60 0.00 19.80 817.3 5 17 64.40 53.60 0.00 18.00 835.3 5 18 64.40 53.60 0.00 18.00 853.3 peak pheromone trap catch 5 19 69.80 53.60 0.00 20.70 874.0 5 20 64.40 53.60 0.00 18.00 892.0 5 21 69.80 51.80 0.00 19.80 911.8 5 22 78.80 48.20 0.00 22.50 934.3 5 23 78.80 51.80 0.00 24.30 958.6 peak female adult emergence 5 24 68.00 55.40 0.00 20.70 979.3 5 25 68.00 50.00 0.00 18.00 997.3 5 26 66.20 48.20 0.00 16.20 1013.5 peak egg laying 5 27 71.60 50.00 0.00 19.80 1033.3 5 28 69.80 51.80 0.00 19.80 1053.1 5 29 64.40 46.40 0.00 14.40 1067.5 5 30 64.40 44.60 0.00 13.50 1081.0 5 31 62.60 46.40 0.00 13.50 1094.5 6 1 60.80 48.20 0.00 13.50 1108.0 6 2 73.40 53.60 0.00 22.50 1130.5 6 3 60.80 50.00 0.00 14.40 1144.9 6 4 64.40 48.20 0.00 15.30 1160.2 6 5 64.40 48.20 0.00 15.30 1175.5 6 6 71.60 44.60 0.00 17.10 1192.6 6 7 62.60 50.00 0.00 15.30 1207.9 6 8 60.80 50.00 0.00 14.40 1222.3 6 9 62.60 48.20 0.00 14.40 1236.7 6 10 60.80 48.20 0.00 13.50 1250.2 6 11 64.40 48.20 0.00 15.30 1265.5 6 12 64.40 44.60 0.00 13.50 1279.0 peak egg hatch 6 13 62.60 51.80 0.00 16.20 1295.2 6 14 64.40 50.00 0.00 16.20 1311.4 6 15 68.00 48.20 0.00 17.10 1328.5 6 16 80.60 55.40 0.00 27.00 1355.5 6 17 86.00 53.60 0.00 28.80 1384.3 6 18 86.00 57.20 0.00 30.60 1414.9 6 19 82.40 60.80 0.00 30.60 1445.5 6 20 87.80 60.80 0.00 33.30 1478.8 6 21 69.80 57.20 0.00 22.50 1501.3 6 22 64.40 55.40 0.00 18.90 1520.2 6 23 71.60 55.40 0.00 22.50 1542.7 6 24 77.00 51.80 0.00 23.40 1566.1 6 25 71.20 53.60 0.00 21.40 1587.5 Hx 6 26 72.70 51.80 0.00 21.25 1608.8 Hx 6 27 71.80 52.40 0.00 21.10 1629.9 Hx Hn 6 28 73.50 54.10 0.00 22.80 1652.7 Hx Hn 6 29 64.40 54.70 0.00 18.55 1671.2 Hn 6 30 62.60 57.20 0.00 18.90 1690.1 7 1 68.00 53.60 0.00 19.80 1709.9 7 2 66.20 51.80 0.00 18.00 1727.9 7 3 71.60 48.20 0.00 18.90 1746.8 7 4 86.00 57.20 0.00 30.60 1777.4 7 5 82.40 64.40 0.00 32.40 1809.8 7 6 77.00 60.80 0.00 27.90 1837.7 7 7 69.80 57.20 0.00 22.50 1860.2 7 8 77.00 55.40 0.00 25.20 1885.4 7 9 71.60 57.20 0.00 23.40 1908.8 7 10 69.80 57.20 0.00 22.50 1931.3 7 11 78.80 57.20 0.00 27.00 1958.3 7 12 82.40 53.60 0.00 27.00 1985.3 7 13 80.60 57.20 0.00 27.90 2013.2 7 14 91.40 57.20 0.00 33.30 2046.5 7 15 87.80 57.20 0.00 31.50 2078.0 peak in density large larvae 7 16 89.60 57.20 0.00 32.40 2110.4 7 17 84.20 57.20 0.00 29.70 2140.1 7 18 75.20 59.00 0.00 26.10 2166.2 7 19 69.80 55.40 0.00 21.60 2187.8 7 20 73.40 57.20 0.00 24.30 2212.1 7 21 75.20 50.00 0.00 21.60 2233.7 7 22 86.00 53.60 0.00 28.80 2262.5 7 23 87.80 59.00 0.00 32.40 2294.9 7 24 87.80 55.40 0.00 30.60 2325.5 7 25 87.80 57.20 0.00 31.50 2357.0 7 26 86.00 57.20 0.00 30.60 2387.6 7 27 86.00 60.80 0.00 32.40 2420.0 7 28 84.20 59.00 0.00 30.60 2450.6 7 29 93.20 59.00 0.00 35.10 2485.7 7 30 89.60 62.60 0.00 35.10 2520.8 7 31 77.00 60.80 0.00 27.90 2548.7 8 1 73.40 57.20 0.00 24.30 2573.0 8 2 68.00 55.40 0.00 20.70 2593.7 8 3 73.40 59.00 0.00 25.20 2618.9 8 4 78.80 53.60 0.00 25.20 2644.1 8 5 86.00 55.40 0.00 29.70 2673.8 8 6 87.80 57.20 0.00 31.50 2705.3 8 7 87.80 57.20 0.00 31.50 2736.8 8 8 95.00 60.80 0.00 36.90 2773.7 8 9 93.20 60.80 0.00 36.00 2809.7 8 10 86.00 57.20 0.00 30.60 2840.3 8 11 71.60 60.80 0.00 25.20 2865.5 8 12 73.40 60.80 0.00 26.10 2891.6 8 13 78.80 55.40 0.00 26.10 2917.7 8 14 84.20 55.40 0.00 28.80 2946.5 8 15 84.20 55.40 0.00 28.80 2975.3 8 16 77.00 53.60 0.00 24.30 2999.6 8 17 73.40 53.60 0.00 22.50 3022.1 8 18 75.20 51.80 0.00 22.50 3044.6 8 19 77.00 53.60 0.00 24.30 3068.9 8 20 91.40 53.60 0.00 31.50 3100.4 8 21 75.70 54.20 0.00 23.95 3124.4 Hx Hn 8 22 80.60 57.20 0.00 27.90 3152.3 8 23 68.00 55.40 0.00 20.70 3173.0 8 24 69.80 51.80 0.00 19.80 3192.8 8 25 60.80 51.80 0.00 15.30 3208.1 8 26 59.00 55.40 0.00 16.20 3224.3 8 27 78.80 51.80 0.00 24.30 3248.6 8 28 78.80 50.00 0.00 23.40 3272.0 8 29 69.80 53.60 0.00 20.70 3292.7 8 30 71.60 55.40 0.00 22.50 3315.2 8 31 68.00 51.80 0.00 18.90 3334.1 9 1 71.60 55.40 0.00 22.50 3356.6 9 2 71.60 48.20 0.00 18.90 3375.5 9 3 73.40 55.40 0.00 23.40 3398.9 9 4 78.80 46.40 0.00 21.60 3420.5 9 5 82.40 48.20 0.00 24.30 3444.8 9 6 84.20 53.60 0.00 27.90 3472.7 9 7 69.80 51.80 0.00 19.80 3492.5 9 8 66.20 55.40 0.00 19.80 3512.3 9 9 62.60 57.20 0.00 18.90 3531.2 9 10 64.40 53.60 0.00 18.00 3549.2 9 11 62.60 53.60 0.00 17.10 3566.3 9 12 62.60 53.60 0.00 17.10 3583.4 9 13 66.20 53.60 0.00 18.90 3602.3 9 14 60.80 51.80 0.00 15.30 3617.6 9 15 60.80 53.60 0.00 16.20 3633.8 9 16 60.80 53.60 0.00 16.20 3650.0 9 17 64.40 48.20 0.00 15.30 3665.3 9 18 66.20 42.80 0.00 13.50 3678.8 9 19 66.20 46.40 0.00 15.30 3694.1 9 20 60.80 53.60 0.00 16.20 3710.3 9 21 59.00 51.80 0.00 14.40 3724.7 9 22 64.40 53.60 0.00 18.00 3742.7 9 23 57.20 48.20 0.00 11.70 3754.4 9 24 64.40 46.40 0.00 14.40 3768.8 9 25 68.00 44.60 0.00 15.30 3784.1 9 26 66.20 46.40 0.00 15.30 3799.4 9 27 71.60 44.60 0.00 17.10 3816.5 9 28 75.20 62.60 0.00 27.90 3844.4 9 29 68.00 57.20 0.00 21.60 3866.0 9 30 57.20 51.80 0.00 13.50 3879.5 10 1 59.00 51.80 0.00 14.40 3893.9 10 2 59.00 42.80 0.00 9.90 3903.8 10 3 51.80 37.40 0.00 4.38 3908.1 10 4 57.20 37.40 0.00 6.96 3915.1 10 5 57.20 41.00 0.00 8.10 3923.2 10 6 60.80 35.60 0.00 8.29 3931.5 10 7 53.60 46.40 0.00 9.00 3940.5 10 8 53.60 50.00 0.00 10.80 3951.3 10 9 64.40 48.20 0.00 15.30 3966.6 10 10 62.60 44.60 0.00 12.60 3979.2 10 11 62.60 39.20 0.00 10.11 3989.3 10 12 59.00 41.00 0.00 9.00 3998.3 10 13 66.20 41.00 0.00 12.60 4010.9 10 14 64.40 41.00 0.00 11.70 4022.6 10 15 66.20 42.80 0.00 13.50 4036.1 10 16 69.80 42.80 0.00 15.30 4051.4 10 17 69.80 44.60 0.00 16.20 4067.6 10 18 66.20 44.60 0.00 14.40 4082.0 10 19 66.20 41.00 0.00 12.60 4094.6 10 20 59.00 35.60 0.00 7.43 4102.0 10 21 64.40 35.60 0.00 10.01 4112.0 10 22 66.20 37.40 0.00 11.35 4123.4 10 23 53.60 37.40 0.00 5.24 4128.6 10 24 59.00 44.60 0.00 10.80 4139.4 10 25 55.40 50.00 0.00 11.70 4151.1 10 26 60.80 44.60 0.00 11.70 4162.8 10 27 57.20 39.20 0.00 7.44 4170.3 10 28 57.20 46.40 0.00 10.80 4181.1 10 29 51.80 46.40 0.00 8.10 4189.2 10 30 53.60 48.20 0.00 9.90 4199.1 10 31 51.80 46.40 0.00 8.10 4207.2 11 1 59.00 51.80 0.00 14.40 4221.6 11 2 60.80 50.00 0.00 14.40 4236.0 11 3 53.60 50.00 0.00 10.80 4246.8 11 4 59.00 50.00 0.00 13.50 4260.3 11 5 53.60 46.40 0.00 9.00 4269.3 11 6 51.80 42.80 0.00 6.30 4275.6 11 7 51.80 35.60 0.00 4.07 4279.6 11 8 48.20 32.00 0.00 2.14 4281.8 11 9 42.80 35.60 0.00 0.39 4282.2 11 10 50.00 35.60 0.00 3.26 4285.4 11 11 50.00 32.00 0.00 2.86 4288.3 11 12 50.00 33.80 0.00 3.04 4291.4 11 13 50.00 32.00 0.00 2.86 4294.2 11 14 55.40 44.60 0.00 9.00 4303.2 11 15 53.60 42.80 0.00 7.20 4310.4 11 16 57.20 46.40 0.00 10.80 4321.2 11 17 50.00 35.60 0.00 3.26 4324.5 11 18 50.00 32.00 0.00 2.86 4327.3 11 19 51.80 30.20 0.00 3.44 4330.8 11 20 51.80 32.00 0.00 3.61 4334.4 11 21 46.40 41.00 0.00 2.70 4337.1 11 22 48.20 44.60 0.00 5.40 4342.5 11 23 48.20 42.80 0.00 4.50 4347.0 11 24 48.20 39.20 0.00 3.05 4350.0 11 25 48.20 39.20 0.00 3.05 4353.1 11 26 57.20 44.60 0.00 9.90 4363.0 11 27 62.60 48.20 0.00 14.40 4377.4 11 28 48.20 41.00 0.00 3.60 4381.0 11 29 50.00 42.80 0.00 5.40 4386.4 11 30 46.40 41.00 0.00 2.70 4389.1 12 1 46.40 33.80 0.00 1.58 4390.7 12 2 46.40 28.40 0.00 1.30 4392.0 12 3 44.60 30.20 0.00 0.78 4392.8 12 4 41.00 26.60 0.00 0.00 4392.8 12 5 42.80 26.60 0.00 0.26 4393.0 12 6 39.20 24.80 0.00 0.00 4393.0 12 7 41.00 24.80 0.00 0.00 4393.0 12 8 39.20 33.80 0.00 0.00 4393.0 12 9 42.80 35.60 0.00 0.39 4393.4
DD accumulation on 12-9-18: 4393QA 100% ok    
  
This year is about  versus  QA
 DDs exceed full year 2017 ok
 49 days behind 2016 ok
 DDs exceed full year 30-yr normals ok
Forecast using:  Fox - IPPC forecast for CYXX data
 12 10  47.10 42.90  0.11   4.00   4397.4  0.113_0.00%_precip.    
 12 11  50.00 42.00  1.32   5.00   4402.4  1.317_0.00%_precip.    
 12 12  45.60 40.70  0.25   2.18   4404.6  0.25_0.00%_precip.    
 12 13  43.80 32.40  0.44   0.60   4405.2  0.437_0.00%_precip.    
 12 14  36.30 13.30  0.60   0.00   4405.2  0.599_0.00%_precip.    
Forecast using: 10 yr Hist Avg CYXX 2006-2015
 12 15  41.50 32.70  0.26   0.05   4405.2  *hist_fcst*    
 12 16  42.10 33.60  0.15   0.17   4405.4  *hist_fcst*    
 12 17  42.90 33.40  0.17   0.37   4405.8  *hist_fcst*    
 12 18  41.50 32.40  0.25   0.05   4405.8  *hist_fcst*    
 12 19  41.60 33.20  0.26   0.07   4405.9  *hist_fcst*    
 12 20  40.80 33.00  0.13   0.00   4405.9  *hist_fcst*    
 12 21  42.50 32.90  0.33   0.26   4406.2  *hist_fcst*    
 12 22  42.10 32.40  0.12   0.16   4406.3  *hist_fcst*    
 12 23  40.90 32.50  0.23   0.00   4406.3  *hist_fcst*    
 12 24  42.10 34.70  0.26   0.18   4406.5  *hist_fcst*    
 12 25  42.30 33.50  0.30   0.22   4406.7  *hist_fcst*    
 12 26  41.30 32.40  0.12   0.02   4406.7  *hist_fcst*    
 12 27  41.40 32.50  0.23   0.04   4406.8  *hist_fcst*    
 12 28  41.60 33.40  0.45   0.07   4406.8  *hist_fcst*    
 12 29  41.20 33.40  0.15   0.01   4406.9  *hist_fcst*    
 12 30  40.70 30.70  0.10   0.00   4406.9  *hist_fcst*    
 12 31  39.10 30.30  0.05   0.00   4406.9  *hist_fcst*    
orange tortrix (mild winter) model - Knight
Location: 2018 CYXX Abbotsford: B. C.
DD accumulation on 12-9-18: 4393 QA 100% ok  - show details 
  
This year is about  versus  QA
 DDs exceed full year 2017 ok
 49 days behind 2016 ok
 DDs exceed full year 30-yr normals ok
DateDDsEvent
 5-18-18 853peak pheromone trap catch
 5-23-18 959peak female adult emergence
 5-26-18 1014peak egg laying
 6-12-18 1279peak egg hatch
 7-15-18 2078peak in density large larvae
degree-day graph of orange tortrix (mild winter) [small fruit] Knight (1988)