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Story Posted: August 25, 2010
Insect Monitoring Update, August 25, 2010
Here's the final Weekly Update for the 2010 field season! We hope the information has been helpful. Thank you to everyone who contributed to the Weekly Updates to make them so useful! Comments, suggestions, or ideas for the 2011 season are most appreciated and can be sent to Jennifer via email (click to email Jennifer Otani). Good luck with harvest!
2010 Weekly Updates are posted to the web!
The season’s updates have been posted as Adobe Acrobat files on the Western Forum on Pest Management website. The files can be located in a drop-down menu at: www.westernforum.org/IPMNWeeklyUpdates.html and a very large 'Thank You' to Kelly Turkington for all his Webmaster support!!
Wheat midge
A piece of useful, information regarding wheat midge resistance from Ian Wise is included below regarding the mechanisms of resistance in the available registered varieties:
"The rationale behind using a dispersed refuge for the wheat midge is because larvae cannot move from one spike to the next. The mode of action of the resistant varieties is that larvae are prevented from feeding on newly-developing seeds due to the induction of phenols in the seed. Only the feeding activities of the larvae cause this early phenol induction, not the adults. These larvae, once they stop feeding, soon die and are incapable of moving further than a few centimeters. Thus, the only possible way for a midge to move is as an adult. Adults do not feed at all and have no way of detecting any differences between a resistant and a susceptible variety. This applies to the presently registered varietal blends. We have identified some wheats that have some oviposition deterrence but, at this time, Waskada is the only released variety exhibiting this trait.
There is a possibility of damage to the resistant seed by the larvae before they die. The damage is much less than on susceptible wheat, and is only detected during grading if populations are very high and many larvae attempt to establish on each seed. As for the possibility of very high damage to the susceptible refuge, this could happen under extremely high populations but it is unlikely."
Grasshoppers (Orthoptera: Acrididae)
As of August 16, the grasshopper model predicted that <1% of the population remained at 4th instar, 6.9% were at 5th instar, and 92.9% of grasshoppers were adults (Refer to table below for site predictions). In comparison, grasshoppers collected from the field on August 19, 2010, from sentinel sites in Saskatchewan were less advanced compared to the model predictions. The field-collected grasshoppers sampled averaged 10.9% at 4th instar, 37.7% at 5th instar and 43.5% were adults (N=138 grasshoppers from 7 sites).
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| Prov |
Location |
Average of % at 5th instar |
Average of % at Adult stage |
| AB |
Calgary |
14.9 |
85.1 |
| AB |
Edmonton |
9.1 |
90.9 |
| AB |
Fairview |
1.5 |
98.5 |
| AB |
Grand Prairie |
9.9 |
90.1 |
| AB |
Halkirk |
35.4 |
64.6 |
| AB |
High Level |
15.0 |
85.0 |
| AB |
Lethbridge |
0.0 |
100 |
| AB |
Manning |
67.3 |
25.8 |
| AB |
Medicine Hat |
0.0 |
100 |
| AB |
Red Deer |
25.0 |
75.0 |
| MB |
Brandon |
0.0 |
100 |
| MB |
Carman |
0.0 |
100 |
| MB |
Dauphin |
0.0 |
100 |
| MB |
Melita |
0.0 |
100 |
| MB |
Swan River |
0.0 |
100 |
| SK |
Estevan |
0.0 |
100 |
| SK |
Kindersley |
0.0 |
100 |
| SK |
Maple Creek |
0.0 |
100 |
| SK |
Melfort |
0.0 |
100 |
| SK |
Prince Albert |
0.0 |
100 |
| SK |
Regina |
0.0 |
100 |
| SK |
Rosetown |
0.0 |
100 |
| SK |
Saskatoon |
0.0 |
100 |
| SK |
Scott |
0.0 |
100 |
| SK |
Swift Current |
0.0 |
100 |
| SK |
Val-Marie |
0.0 |
100 |
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Average |
6.9 |
92.9 |
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Upcoming Meetings
To find other pest management-related meetings, go to: International Society for Pest Information (http://www.pestinfo.org/meetfilter.php3).
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| Date |
Meeting |
Location |
Link |
| Oct 3-7, 2010 |
Biological Control for Nature Conference |
Northampton, MA, USA |
Click for more details |
| Oct 13-15, 2010 |
Western Forum on Pest Management / Western Committee on Crop Pests / Western Committee on Plant Diseases |
Lethbridge, AB, Canada |
Click for more details |
| Oct 15-17, 2010 |
Entomological Society of Ontario |
Grand Bend, ON, Canada |
Click for more details |
| Oct 14-16, 2010 |
Entomological Society of Alberta |
Lethbridge, AB, Canada |
Click for more details |
| Oct 22-23, 2010 |
Entomological Society of Manitoba |
Winnipeg, MB, Canada |
Click for more details |
| Oct 25-26, 2010 |
5th Annual Biocontrol Industry Meeting (ABIM) |
Lucerne, Swtizerland |
Click for more details |
| Oct 31 – Nov 3, 2010 |
Joint Annual Meeting of the Entomological Society of BC and Canada |
Vancouver, BC, Canada |
Click for more details |
| TBA – Nov 2010 |
Société d’entomologie du Québec |
QC, Canada |
Click for more details |
| Dec 12-15, 2010 |
Entomological Society of America |
San Diego, CA, USA |
Click for more details |
| Mar 5-9, 2011 |
Global Conference on Entomology (GCE 2011) |
Chiang Mai, Thailand |
Click for more details |
| TBA - Summer 2011 |
The Acadian Entomological Society |
TBA |
Click for more details |
| Aug 28-Sep 1, 2011 |
60th Annual Conference of Ent. Soc. of New Zealand |
Canterbury, New Zealand |
Click for more details |
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