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How to Manage Pests

Degree-days: Reference Tables

Pink Bollworm

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: 57.0°F      Upper Threshold: 91.0°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
4800000000
50000000000
520000000000
5400000000000
56000000000000
580000000000001
6000011111111123
62111111111222345
641222222222334567
6622222333334456789
6833333344445567891011
7034444445556678910111213
7244455555667789101112131415
7455556666778891011121314151617
7666666777888910111213141516171819
7877777888999101112131415161718192021
80788888999101011121314151617181920212223
8288999910101011111213141516171819202122232425
849991010101111111212131415161718192021222324252627
86101010111111121212131314151617181920212223242526272829
8811111111121212131314141516171819202122232425262728293031
901212121213131314141515161718192021222324252627282930313233
921213131314141415151616171819202122232425262728293031323334
941313141414151515161617181920212223242526262728293031323334
961414141415151616161718181920212223242526272829303132323334
981414151515161617171818192021222324252526272829303132333334
1001515151516161717171819192021222324252627282929303132333334
1021515161616171717181819202122222324252627282930303132333334
1041516161617171718181919202122232425262627282930313132333334
1061616161717171818191920202122232425262728282930313232333334
1081616171717181819192020212223232425262728292930313232333334
1101617171718181819192020212223242525262728293030313232333434
1121717171818181919202021212223242526262728293030313232333434
1141717181818191919202021222223242526272728293031313233333434
1161718181819191920202121222324242526272828293031313233333434
1181818181819192020202121222324252526272829293031313233333434

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

Accessibility   /WEATHER/DDTABLE/pink_bollworm.html revised: July 10, 2014. Contact webmaster.