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How to Manage Pests

Degree-days: Reference Tables

Obliquebanded Leafroller (Almonds, Prunes)

Information about how to use this model in almonds, apricots or prunes

See also obliquebanded leafroller on nectarines, peaches, and pistachios.

To find total degree-days for a day, locate the minimum and maximum temperatures and follow the column and row to where they intersect. For odd-numbered temperatures, interpolate between numbers.

Lower Threshold: 43.0°F      Upper Threshold: 85.0°F      Method: Single Sine      Cutoff: Vertical
Minimum temperatures
Max
temps
40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86
40 0
42 0 0
44 0 0 1
46 1 1 2 3
48 2 2 3 4 5
50 3 3 4 5 6 7
52 4 4 5 6 7 8 9
54 5 5 6 7 8 9 10 11
56 6 6 7 8 9 10 11 12 13
58 7 7 8 9 10 11 12 13 14 15
60 8 8 9 10 11 12 13 14 15 16 17
62 8 9 10 11 12 13 14 15 16 17 18 19
64 9 10 11 12 13 14 15 16 17 18 19 20 21
66 10 11 12 13 14 15 16 17 18 19 20 21 22 23
68 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
70 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
72 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
74 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
76 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
78 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
80 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
82 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
84 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
86 16 17 18 19 20 20 21 22 23 24 25 25 26 27 28 28 29 29 29 29 29 27 21 0
88 14 15 16 16 17 18 19 20 20 21 22 22 23 23 24 24 24 25 24 24 23 20 14 0
90 13 14 14 15 16 17 17 18 19 19 20 20 21 21 22 22 22 22 22 21 19 17 11 0
92 12 13 13 14 15 16 16 17 17 18 19 19 19 20 20 20 20 20 20 19 17 15 10 0
94 11 12 13 13 14 15 15 16 17 17 18 18 18 19 19 19 19 19 18 17 16 13 8 0
96 11 11 12 13 13 14 15 15 16 16 17 17 17 18 18 18 18 17 17 16 15 12 8 0
98 10 11 12 12 13 13 14 15 15 16 16 16 17 17 17 17 17 17 16 15 14 11 7 0
100 10 10 11 12 12 13 13 14 14 15 15 16 16 16 16 16 16 16 15 14 13 11 7 0
1021010111112121313141415151516161615151414121060
104910101111121313131414151515151515141413121060
1069910111112121313131414141415141414131211960
1089910101111121213131314141414141413131211950
110999101111121212131313131414141313121210850
112899101011111212121313131313131313121110850
114889101011111112121213131313131312121110850
1168899101011111112121212131312121211119850
1188899101010111112121212121212121211109750

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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