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One more Lso-positive psyllid found in Idaho

Potato     
September 12, 2014 by Erik Wenninger

A potato psyllid collected from a grower’s field in Owyhee County last week tested positive for liberibacter (Lso), the bacterium that causes zebra chip disease. This psyllid was collected on a sticky trap in the same field that trapped an Lso-positive psyllid two weeks before. During this week we trapped an additional eight psyllids (average of two per card) in that same field that will be tested for Lso. We also trapped psyllids in a few other sites in Canyon and Elmore Counties this week. Again, psyllid captures were higher this week in western Idaho than central and eastern Idaho; only one psyllid was found on a sticky trap in the Magic Valley this week (Twin Falls County).

Many of the fields we are monitoring have undergone vine kill. For those fields that have yet to be vine killed, it is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest—especially in western Idaho where psyllid numbers have been higher.

Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:

https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0

Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:

https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0

More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.

http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/

More information...
 
 

Idaho Association of Plant Protection

     
September 8, 2014 by Jeff Miller

Dear colleagues,

This is a call for papers for the 2014 annual meeting of the Idaho Association of Plant Protection in Jerome, ID at the Best Western Sawtooth Inn and Suites on Wednesday, November 5 at 1:00 pm to Thursday, November 6 at 12:00 p.m.

Please consider contributing research results, observations, unusual disease occurrences, etc. to the meeting. Please do NOT plan a long, formal presentation. Talks will be limited to 15 minutes with 5 minutes of discussion. A final program will be advertised in late October. Registration begins at 12:30 p.m. on Wednesday and the program will begin at 1:00 p.m. Registration costs $15.00 and can only be made by check or cash. Certified Crop Advisor (CCA) and Pesticide Recertification credits (ISDA) will be available.

Hotel reservations at the Best Western Sawtooth Inn can be made by calling 208-324-9200. Indicate you will be attending the IAPP meetings. Regular rooms are available at the corporate rate of $69.99 + tax, but reservations must be made prior to October 21.

Please reply by email or complete and return the bottom half of the attached sheet. If you are not attending this meeting but would like to be notified of future meetings, please send us your updated contact information.

We would appreciated it if you could circulate the attached memorandum to interested individuals and colleagues who are not in this group.

Thank you and we are looking forward to seeing you in November.

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Idaho psyllid monitoring update

Potato     
September 5, 2014 by Erik Wenninger

Potato psyllid captures in our monitoring program were at similar levels to the previous two weeks (i.e., slightly higher than in previous weeks, though still relatively low compared to previous years). Again, most psyllids—nearly all this week—were found in the Treasure Valley (Canyon and Owyhee Counties) or Elmore County. In addition we captured one psyllid at a site in Twin Falls County. Psyllid numbers were the highest we’ve seen yet this year (1.25 or 1.75 on average per card). This is not surprising given the trend of increasing psyllid numbers toward the end of the season that we have observed during the last two years. It is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest.

Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:

https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0

Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:

https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0

More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.

http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/

More information...
 
 

Late season late blight management

Potato     Eastern Idaho
September 4, 2014 by Jeff Miller

As harvest approaches, managing late blight going into storage is critical for growers in areas affected by late blight. Attached is a checklist of steps growers can take to manage late blight at then end of the season and into storage.

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This website utilizes a network of growers around the Pacific Northwest. As information about pest infestations becomes available, registered users will receive updates pertaining to the specific crops that they may be growing at the time.