POTATO PSYLLIDS:  The psyllid trapping season is quickly coming to a close. About one-third of our sticky traps in potato fields have been removed for vine killing operations or harvest, and all of the traps will be removed over the next two weeks. But, this week we found potato psyllids in 35% of the fields that still have traps in them.  A total of 191 psyllids have been collected in our monitoring network fields this season. This is more than the 97 psyllids we collected by Sept. 15, 2017. But, it is far fewer than the almost 19,000 psyllids we collected by Sept. 16, 2016. This is evidence of some large seasonal fluctuations in potato psyllid populations in the Columbia Basin. 

POTATO PSYLLIDS:  This week there were potato psyllids in 36% of the fields we monitored using yellow sticky cards. Psyllids were found in fields near George, Quincy, Moses Lake, Royal City, Othello, Eltopia, Pasco, Burbank, Paterson, and Plymouth.  We expect to find more psyllids in more fields as the season comes to a close. Adult psyllids tend to migrate away from fields with dead or dying vines and move into fields that still have some growth. We have collected a total of 158 psyllids in our monitoring network fields this season. Last year, we had 67 psyllids by Sept. 8. In 2016, we had collected about 17,000 psyllids by Sept. 9. Clearly, the size of potato psyllid populations in the Columbia Basin have varied greatly from season to season.

POTATO PSYLLIDS:  This week there were potato psyllids in 26% of the fields we monitored using yellow sticky cards. There were not many psyllids on the cards. We found psyllids in fields near George, Moses Lake, Warden, Mattawa, Othello, Eltopia, Pasco, Burbank, and Plymouth.  

POTATO PSYLLIDS:  This week there were potato psyllids in 27% of the fields we monitored using yellow sticky cards. We found psyllids on the Royal Slope and near the towns of Mattawa, Othello, Eltopia, Pasco, Burbank, Paterson, and Plymouth. Again this week, there are higher populations in the Lower Columbia Basin. 

None of the psyllids we have collected this year have tested positive for Lso (that is the bacterial pathogen spread by psyllids that causes zebra chip), but the HAREC Plant Pathology Clinic in Hermiston reported a couple of positives a few weeks ago.   

POTATO PSYLLIDS:  This week there were potato psyllids in 32% of the fields we monitored using yellow sticky cards. We found psyllids at locations all over the Basin (George, Royal City, Quincy, Moses Lake, Basin City, Eltopia, Pasco, and Plymouth) but there are more of them in the Lower Columbia Basin. 

None of the psyllids we have collected this year have tested positive for Lso (that is the bacterial pathogen spread by psyllids that causes zebra chip), but the HAREC Plant Pathology Clinic in Hermiston reported a couple of positives last week.

POTATO PSYLLIDS:  This week there were potato psyllids in 26% of the fields we monitored using yellow sticky cards. Psyllids were on sticky cards near George, Mattawa, Royal City, Eltopia, Pasco, Burbank, and Plymouth (i.e, all across the Basin).  

POTATO PSYLLIDS:  We found potato psyllids in 20% of the fields we are monitoring using yellow sticky cards. These were on sticky cards near George, Mattawa, Bruce, Eltopia, Pasco, and Plymouth (i.e, all across the Basin).  Potato psyllids are migrating into potato fields all over the Columbia Basin now.    

SCOUT FOR PSYLLID NYMPHS & EGGS:  If you find psyllid eggs or nymphs, then you might want to reconsider your earlier psyllid management program and you might want to apply an insecticide that will control eggs and nymphs. If you are also needing to control spider mites, there are several pest control products that target both immature psyllids and mites.     

POTATO PSYLLIDS:  We found potato psyllids on 10% of the traps deployed for our monitoring network, but saw some more on cards brought to us by cooperating consultants. Please note that the maps below may not represent the full extent of distribution this week, because they do not include the results from locations outside of our monitoring network. Most of the cooperator's psyllids were found in areas east of the Tri-Cities.  Potato psyllids are migrating into potato fields all over the Columbia Basin now.