Table 1 Overall nationwide and state summary of Varroa mite infestation and Nosema spore count between 2015 and 2022. N1: Number of analyzed samples per state for Varroa mite, N2: Samples analyzed for Nosema. T1: Total number of samples analyzed per state. T2: National sums and averages, VP: Varroa prevalence, NS: Nosema spore count (Million Spores/Bee), and NP: Nosema prevalence. States were assigned to climate regions according to the U.S. National Centers for Environmental Information (Karl and Koss 1984).
Code | N1 | N2 | T1 | VIL% | VP% | NS | NP% | Climate Region | Abbrev. CR |
|---|---|---|---|---|---|---|---|---|---|
AK | 5 | 7 | 12 | 1.08 | 100 | 9.02 | 100 | – | – |
AL | 5 | 8 | 13 | 10.69 | 100 | 8.84 | 100 | Southeast | SE |
AR | 9 | 4 | 13 | 7.6 | 88.9 | 1.69 | 100 | South | SW |
AZ | 3 | – | 3 | 5.83 | 100 | – | – | Southwest | SW |
CA | 82 | 73 | 155 | 5.2 | 65.9 | 4.76 | 100 | West | W |
CO | 118 | 15 | 133 | 9.04 | 83.1 | 2.77 | 100 | Southwest | SW |
CT | 321 | 186 | 507 | 10.29 | 99.4 | 7.28 | 99.5 | Northeast | NE |
DC | 3 | - | 3 | 5.93 | 66.7 | – | – | Northeast | NE |
DE | 15 | 2 | 17 | 30.85 | 100 | 7.85 | 100 | Northeast | NE |
FL | 16 | 13 | 29 | 2.81 | 87.5 | 3.97 | 100 | Southeast | SE |
GA | 13 | 15 | 28 | 7 | 84.6 | 8.91 | 100 | Southeast | SE |
IA | 10 | 5 | 15 | 13.21 | 90.0 | 6.28 | 100 | Upper Midwest | UMW |
ID | 11 | 7 | 18 | 6.54 | 90.9 | 1.22 | 100 | Northwest | NW |
IL | 174 | 51 | 225 | 7.86 | 75.3 | 6.08 | 100 | Ohio Valley | OV |
IN | 176 | 38 | 214 | 19.08 | 93.8 | 5.87 | 100 | Ohio Valley | OV |
KS | 23 | 5 | 28 | 6.8 | 91.3 | 1.09 | 100 | South | S |
KY | 14 | 8 | 22 | 8.74 | 85.7 | 4.54 | 100 | Ohio Valley | OV |
LA | 14 | 7 | 21 | 1.4 | 92.9 | 3.51 | 100 | South | S |
MA | 521 | 308 | 829 | 11.2 | 88.5 | 7 | 98.7 | Northeast | NE |
MD | 104 | 39 | 143 | 6.61 | 85.6 | 16.84 | 97.4 | Northeast | NE |
ME | 60 | 34 | 94 | 9.25 | 88.3 | 6.96 | 100 | Northeast | NE |
MI | 214 | 39 | 253 | 17.74 | 80.8 | 7.5 | 100 | Upper Midwest | UMW |
MN | 46 | 22 | 68 | 8.9 | 89.1 | 15.77 | 100 | Upper Midwest | UMW |
MO | 78 | 29 | 107 | 6.4 | 85.9 | 10.99 | 96.6 | Ohio Valley | OV |
MS | 1 | – | 1 | 0.4 | 100 | – | – | South | S |
MT | 20 | 4 | 24 | 10.6 | 85.0 | 2.36 | 100 | Northern Rockies and Plains | NRP |
NC | 37 | 23 | 60 | 9.97 | 97.3 | 14.12 | 100 | Southeast | SE |
ND | 3 | 15 | 18 | 11.23 | 100 | 3.3 | 100 | Northern Rockies and Plains | NRP |
NE | 6 | 5 | 11 | 5.5 | 100 | 12.05 | 100 | Northern Rockies and Plains | NRP |
NH | 78 | 29 | 107 | 14.43 | 93.6 | 15.18 | 100 | Northeast | NE |
NJ | 58 | 54 | 112 | 12.28 | 93.1 | 10.45 | 100 | Northeast | NE |
NM | 21 | – | 21 | 3.96 | 47.6 | – | – | Southwest | SW |
NV | 2 | – | 2 | 0.5 | 50.0 | – | – | West | W |
NY | 382 | 833 | 1215 | 10.27 | 91.1 | 4.68 | 99.0 | Northeast | NE |
OH | 593 | 271 | 864 | 6.76 | 92.6 | 3.46 | 100 | Ohio Valley | OV |
OK | 17 | 5 | 22 | 10.97 | 82.4 | 0.99 | 100 | South | S |
OR | 56 | 25 | 81 | 7.44 | 80.4 | 3.46 | 100 | Northwest | NW |
PA | 152 | 224 | 376 | 12.49 | 89.5 | 4.39 | 100 | Northeast | NE |
RI | 6 | 1 | 7 | 2.73 | 83.3 | 11.8 | 100 | Northeast | NE |
SC | 56 | 15 | 71 | 2.54 | 66.1 | 1.28 | 100 | Southeast | SE |
SD | 10 | 338 | 348 | 7.6 | 100 | 3.44 | 99.7 | Northern Rockies and Plains | NRP |
TN | 21 | 10 | 31 | 10.4 | 90.5 | 4.15 | 100 | Ohio Valley | OV |
TX | 30 | 11 | 41 | 2.85 | 100 | 5.17 | 100 | South | S |
UT | 21 | 4 | 25 | 4.51 | 61.9 | 8.78 | 100 | Southwest | SW |
VA | 216 | 95 | 311 | 7.15 | 82.9 | 11.92 | 100 | Southeast | SE |
VT | 47 | 36 | 83 | 3.59 | 42.6 | 3.43 | 97.2 | Northeast | NE |
WA | 41 | 44 | 85 | 3.85 | 65.9 | 6.2 | 100 | Northwest | NW |
WI | 82 | 21 | 103 | 6.9 | 70.7 | 11.51 | 100 | Upper Midwest | UMW |
WV | 48 | 16 | 64 | 13.32 | 91.7 | 8.22 | 100 | Ohio Valley | OV |
T2/AVG | 4039 | 2994 | 7033 | 8.21 | 85.14 | 6.80 | 99.73 | – | – |
