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How to Manage Pests

Degree-days: Reference Tables

| DD menu | About degree-days | Other reference tables |

Orange Tortrix

Information about how to use this model in grapes

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: 78.0°F      Method: Single Sine      Cutoff: Horizontal
Minimum temperatures
Max
temps		 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90
4811222345
50222334567
523334456789
544445567891011
565556678910111213
585667789101112131415
606778891011121314151617
627888910111213141516171819
648999101112131415161718192021
6699101011121314151617181920212223
68101011111213141516171819202122232425
7011111212131415161718192021222324252627
721212131314151617181920212223242526272829
74131314141516171819202122232425262728293031
7614141515161718192021222324252627282930313233
781515161617181920212223242526272829303132333435
80161617171819202122232425262728293031323333343535
8216171718191920212223242526272829303132333434353535
841717181819202122232425262728293030313233343535353535
86171818192020212223242526272829303132323334353535353535
8818181919202122232425262727282930313233333435353535353535
901819192020212223242526272829293031323333343535353535353535
921919202021222324242526272829303131323334343535353535353535
941919202021222324252627272829303131323334343535353535353535
961920202121222324252627282829303132323334343535353535353535
982020212122232424252627282929303132323334343535353535353535
1002020212122232425252627282930303132333334343535353535353535
1022021212222232425262727282930313132333334343535353535353535
1042021212223232425262728282930313132333334343535353535353535
1062121222223242425262728282930313132333334343535353535353535
1082121222223242525262728292930313232333334343535353535353535
1102122222323242526262728293030313232333334343535353535353535
1122122222323242526272728293030313232333334343535353535353535
1142222222324242526272828293030313232333434343535353535353535
1162222232324252526272828293031313232333434343535353535353535
1182222232324252526272828293031313232333434343535353535353535

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