April 10th, 2000 Volume 9 No. 4 Update on Pest Management and Crop Development
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Current DD accumulations |
43°F |
50°F |
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(Geneva 1/1-4/10): |
181 |
68 |
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(Geneva 1999 1/1-4/10): |
135 |
56 |
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(Geneva "Normal" 1/1-4/10): |
111 |
51 |
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(Highland 1/1-4/10): |
261 |
114 |
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Coming Events: |
Ranges: |
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Green apple aphids present |
127-297 |
54-156 |
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Green fruitworm 1st flight peak |
64-255 |
19-108 |
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Pear psylla 1st egg hatch |
111-402 |
55-208 |
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Pear thrips in pear buds |
137-221 |
54-101 |
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Redbanded leafroller 1st catch |
32-480 |
5-251 |
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Rosy apple aphid nymphs present |
91-291 |
45-148 |
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Spotted tentiform leafminer 1st catch |
73-433 |
17-251 |
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Tarnished plant bug adults active |
71-536 |
34-299 |
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McIntosh at half-inch green |
112-221 |
54-102 |
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Peach at half-inch green |
154-230 |
61-107 |
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Pear at green cluster |
188-292 |
68-138 |
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Plum at green cluster |
170-282 |
75-138 |
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Sweet cherry at bud burst |
135-235 |
53-101 |
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Tart cherry at bud burst |
135-279 |
53-138 |
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Phenologies (Geneva): Apple (McIntosh): |
Quarter-Inch Green |
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Green Tip |
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Bud Burst |
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Swollen Bud |
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Swollen Bud |
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Quarter-Inch Green |
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Bud Burst |
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(Highland): Apple (McIntosh): |
Tight Cluster |
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Early Green Cluster |
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25% Bloom |
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Petal Fall |
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Green Cluster |
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Geneva |
3/30 |
4/3 |
4/6 |
4/10 |
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Green Fruitworm |
- |
0.1* |
0.0 |
0.0 |
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Redbanded Leafroller |
- |
0.0 |
0.0 |
0.0 |
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Spotted Tentiform Leafminer |
- |
0.0 |
0.0 |
0.0 |
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Highland (Dick Straub, Peter Jentsch): |
3/20 |
3/27 |
4/3 |
4/10 |
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Green Fruitworm |
0.0 |
1.4* |
0.4 |
0.0 |
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Redbanded Leafroller |
0.0 |
0.5* |
3.8 |
4.7 |
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Spotted Tentiform Leafminer |
0.0 |
0.0 |
0.1* |
2.4 |
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Pear Psylla (eggs/100 buds) |
3.0* |
42.0 |
13.0 |
40.0 |
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Pear Psylla nymphs/100 clusters |
- |
- |
- |
1.0* |
| * = 1st catch
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Highland: |
1st Pear Psylla nymphs and Pear Thrips observed. |
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Tarnished Plant Bug observed on Bartlett and Bosc pears. |
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Rose Leafhopper observed on multiflora rose. |