Pacific Northwest Pest Alert is reporting that this week they had traps deployed in 62 of the 79 fields (78.4%) monitored this year, and they found a total of 32 psyllids across 13 (16.4%) of the 79 monitored fields. Many of the 79 total fields that they were sampling have been vine-killed.
Psyllids were collected on sticky traps in potato in the following counties: Payette (1 field), Canyon (6 fields), Owyhee (2 fields), Twin Falls (2 fields), Jerome (1 field), and Power (1 field).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.
Their research with Russet Burbank in Idaho has shown that plants should be protected from infection with the ZC bacterium at least until one week before vine kill to reduce ZC symptoms. Therefore, they continue to urge growers to maintain their IPM programs.
Following recommendations from our their Advisory Committee last year, they shortened the duration of their monitoring program. This week they conclude the official monitoring program, though they will continue monitoring fields at the Kimberly Research & Extension Center as well as grower- and crop consultant-submitted samples. They will post any important updates that develop.
More information can be found here: http://www.uidaho.edu/cals/
–Click on the links under “Updated weekly reports” for details on trap captures.
–Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
–WSU site: https://potatoes.decisionaid.
» http://www.uidaho.edu/cals/
» https://potatoes.decisionaid.
View full alert at: http://pnwpestalert.net/
