Hop Aphid
Hop aphid, Phorodon humuli, feeds on hop plant juices and contaminates the cones. Its feeding can lead to yield and quality losses and may contribute to detrimental flavor characteristics. Sooty mold associated with hop aphid honeydew can also contaminate the plant and reduces its photosynthetic area. This may result in loss of the entire crop because affected cones can be rendered unmarketable.
2011 Results
2011 Compounds Evaluated
2011 Pre-Treatment Aphid Counts
2010 Results
2010 Compounds Evaluated
2010 Idaho Efficacy Trials
Six miticides and one aphicide (BeLeaf) were evaluated for efficacy at the Southwest Idaho Research and Extension Center in Parma, Idaho. Neither spider mite nor aphid populations developed damaging levels in 2010. Mean spider mite and spider mite egg numbers did not exceed 2 per leaf on treated or control plots. Mean hop aphid numbers did not exceed 4 per leaf on treated or control plots. These numbers were not high enough to detected significant differences in numbers of these pests between treatments.
Treatment |
Rate (Oz. / |
Spider mites |
Spider mite eggs |
Hop aphids |
Acramite 4 SC |
24 |
0.4 ± 0.23 |
1.3 ± 0.51 |
1.8 ± 0.43
|
Agri-Mek 0.15 EC |
16 |
0.5 ± 0.30 |
1.7 ± 0.85 |
2.2 ± 0.49 |
BeLeaf 50 SG |
2.8 |
0.3 ± 0.07 |
0.7 ± 0.26 |
1.4 ± 0.54 |
Envidor 2 SC |
16 |
0.7 ± 0.31 |
1.4 ± 0.74 |
2.2 ± 0.45 |
Onager 1E |
6 |
0.3 ± 0.14 |
1.0 ± .55 |
1.2 ± 0.0.27 |
Ultiflora (Mesa) |
30 |
1.2 ± 0.71 |
1.6 ± 0.95 |
1.7 ± 0.37 |
Zeal |
4 |
0.7 ± 0.34 |
1.3 ± 0.49 |
2.0 ± 0.41 |
UTC |
n/a |
0.92 ± 0.21 |
1.7 ± 0.44 |
3.9 ± 0.97 |
Entomology subpage
This page is designed to provide additional information pursuant to the Entomology component of the overall project discussed on the Washington State University website http://hopmintstress.wsu.edu .
It is not designed to be viewed or utilized independently of that website.
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