Kansas State University

2011 Survey Data

This research is being conducted by K-State Extension in cooperation with USDA-ARS-Weslaco. The samples are being collected by Phil Sloderbeck, Kansas State University, Southwest Research and Extension Center, Garden City, KS, and processed by John Goolsby and others at, USDA-ARS, Weslaco, Texas. The molecular pathology work is being done by Jim Crosslin and Joe Munyaneza (USDA-ARS Prosser & Wapato, WA).

The potato psyllid adults in each field are monitored with yellow sticky card traps that are changed weekly. Once the potatoes are planted the traps are placed in a sequence #1 at 30 ft. inside the field with each additional trap placed 200 ft towards the center of the field. This year we are also placing 12 sticky traps in the perimeter of the commercial field to increase the trap catch.

This year we will be monitoring one commercial potato field near Garden City, KS (GC53) and a small patch of potatoes at the Southwest Research and Extension Center to serve as an untreated control (UTC). Traps are collected and sent to Texas for processing. Adult potato psyllids are removed from the traps and tested for the presence of the putative ZC pathogen, Liberibacter psyllaurous candidatus. The percentage of psyllids that test positive for this pathogen is noted by date.

Website Address: http://www.entomology.k-state.edu/PsyllidSurvey

Procedures

We are just beginning to monitor fields for 2011. We put out the first set of sticky traps on March 15, 2011 at the UTC plot on the Garden City Experiment Station (5 traps) plus an additional set of 5 traps in a nearby wheat field (Trap Line). Sticky traps were placed around the perimeter of the commercial potato field on March 19, 2011. We planted the untreated control plot on March 25, 2011 with FL1867 seed potatoes. Planting Untreated control plot March 25, 2011 Dirty Sticky Trap - Field 53 - March 26, 2011 April 6, 2011 -- Commercial field (Field 53) was planted with Atlantic potatoes on April 6th with Thimet, Macho and Quadris put on at planting. May 1, 2011 -- potatoes just beginning to crack soil in Untreated Control Plot -- nothing in Field 53. May 22 -- Comercial Field 53 was sprayed with Movento and Pounce May 31 -- Comercial Field 53 was sprayed with Movento and Pounce -- Potatoes just beginning to bloom. June 11 -- Comercial Field 53 was sprayed with Oberon, Asana. June 22 -- Comercial Field 53 was sprayed withAgri-Mek, Thiodan. June 21-27 -- Big Jump in Adult Psyllid numbers this week. June 30 -- Commercial Field 53 was sprayed Agri-Mek and Thiodan June 27 to July 5 -- Psyllid numbers remained high on traps in commercial field this week July 5-11 -- Psyllid numbers dropped this week. July 18 -- Traps pulled in preparation for harvest. July 24, 25, 26, 27 -- Field 53 was harvested - ZC was detectable only at very low levels August 2 -- Harvested the untreated control plot -- sample of 400 potatoes sent for testing -- no ZC symptoms detected. August 4 -- after harvest sampe of potatoes collected from field 53 and sent 100 potatoes for testing

Survey Results

Click here to open pdf file with graphs of the 2011 Psyllid Survey Results

Untreated Control Plot (5 traps)

3/15 to 3/22 --- 0 Psyllids 3/22 to 3/26 --- 0 Psyllids 3/26 to 4/1 --- 0 Psyllids 4/1 to 4/10 --- 0 Psyllids 4/10 to 4/17 --- 0 Psyllids 4/17 to 4/24 --- 0 Psyllids 4-24 to 5/1 --- 0 Psyllids 5/1 to 5/8 --- 3 Psyllids (0 positive for Liberibacter) 5/8 to 5/15 --- 0 Psyllids (5 traps and 30 Leaves) -- adults, eggs, small nymphs, large nymphs, total nymphs 5/15 to 5/22 --- 0,0,0,0,0 5/22 to 5/31 --- 0,0,0,0,0 5/31 to 6/6 --- 0,0,0,0,0 6/6 to 6/13 --- 1,0,0,0,0 -- 0 hot 6/13 to 6/21 --- 2,0,0,0,0 -- 0 hot 6/21 to 6/27 --- 12,0,0,0,0 -- 0 hot 6/27 to 7/5 -- 1,0,0,0,0 -- 0 hot 7/5-7/11 -- 0,0,0,0,0 7/11-7/18 -- 0,0,0,0,0

Field 53 (Five Traps in Field)

5/8 to 5/15 --- 0 Psyllids 5/15 to 5/22 --- 0 Psyllids 5/22 to 5/31 --- 0 Psyllids (Five Sticky Traps in the Field and 10 samples of 10 leaves around perimeter of field)
adults, eggs, small nymphs, large nymphs, total nymphs 5/31 to 6/6 --- 0,0,0,0,0 6/6 to 6/13 --- 1,0,7,0,7 - 0 hot 6/13 to 6/20 --- 3,0,0,0,0 - 0 hot 6/20 to 6/27 --- 35,0,0,0,0 - 0 hot 6/27 to 7/5 --- 46,0,0,0,0 - 0 hot 7/5 - 7/11 --- 5,0,0,0,0 7/11-7/18 -- 8,0,0,0,0

Other Trap Locations earlier in the season

Trap Line (5 traps) 3/15 to 3/22 --- 0 Psyllids 3/22 to 3/26 --- 0 Psyllids 3/26 to 4/1 --- 0 Psyllids 4/1 to 4/10 --- 0 Psyllids 4/10 to 4/17 --- 0 Psyllids 4/17 to 4/24 --- 0 Psyllids 4-24 to 5/1 --- 0 Psyllids 5/1 to 5/8 --- 0 Psyllids 5/8 to 5/15 --- 0 Psyllids 5/15 to 5/22 --- 0 Psyllids 5/22 to 5/31 --- 0 Psyllids 5/31 to 6/6 --- 0 Psyllids Field53 (12 traps around perimeter of field) 3/19 to 3/26 --- 0 Psyllids 3/26 to 4/1 --- 0 Psyllids 4/1 to 4/10 --- 0 Psyllids 4/10 to 4/17 --- 0 Psyllids 4/17 to 4/24 --- 0 Psyllids 4-24 to 5/1 --- 0 Psyllids 5/1 to 5/8 --- 1 Psyllid (0 positive for Liberibacter) 5/8 to 5/15 --- 0 Psyllids Link to earlier reports -- Potato Psyllid Survey -- Archived Reports - April and May 2009 Archived Reports - June and July 2009 Archived Reports - August and September 2009 Data from 2010 Information on Potato Psyllids and Zebra Chip Disease Potato Zebra Chip Disease: A Phytopathological Tale (Plant Health Progress - March 2010) Bacterium Identified as Potato Disease Culprit (Plant Health Progress - Oct 2009) Research Project: Biology, Etiology, and Management of Zebra Chip Disease (Texas A&M) Biorational Control Methods for Insect Pests of Potato (USDA) Zebra chip - From Wikipedia, the free encyclopedia Zebra Chip Disease of Potato - TAMU System Agricultural Research and Extension Center Zebra chip pictures -- Whitney Cranshaw -- Forestry Images.org People only eat 1 when the chips are brown. - AgriLife research Potato Psyllids - Whitney Canshaw -- Colorado State University For more information contact:

Phil Sloderbeck Extension Entomologist Kansas State University Southwest Research and Extension Center 4500 East Mary St. Garden City, Kansas 67846 Phone: 620-275-9164 E-mail: psloderb@ksu.edu

John A. Goolsby, Ph.D. Research Entomologist, Biological Control of Pests and Weeds United States Department of Agriculture, Agricultural Research Service Kika de la Garza Subtropical Agricultural Research Center, Beneficial Insects Research Unit 2413 East Highway 83, Weslaco, Texas, USA 78596 Phone: 956-969-4803 E-mail: john.goolsby@ars.usda.gov