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Department of Entomology

Department of Entomology
123 W. Waters Hall
1603 Old Claflin Place
Kansas State University
Manhattan KS 66506-4004

785-532-6154
785-532-6232 fax
entomology@ksu.edu

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Data from 2010

This research is being conducted by K-State Extension in cooperation with USDA-ARS-Weslaco. The samples are being collected by Ankush Joshi, 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 5 yellow sticky card traps that are changed weekly. The traps are placed in a sequence #1 at 30 ft. inside the field with each trap placed each 200 ft towards the center of the field. This year we are also placing 10 sticky traps in the perimiter of the commercial fields to increase the trap catch.

This year we will be monitoring three commercial potato fields near Garden City, KS (Tri1, S11 and FJL7) and a small patch of potatoes at the Southwest Reseach 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.

Survey Results

We are just beginning to monitor fields for 2010.

We planted the untreated control plot on April 6, 2010 and put out the first set of sticky traps.

Potato Psyllid Survey>Traps in Untreated control plot on April 6, 2010

Potato Psyllid Survey>Yellow sticky trap in UTC plot on April 6, 2010

Traps in untreated control plot on April 6, 2010.

We changed the traps in UTC and set out traps if field Tri1 on April 13, 2010 (Field was planted a few days earlier)

Potato Psyllid Survey>Setting out traps on Tri1, April 13, 2010

Putting traps in perimeter of Tri1

We collected/and replaced those traps on April 19 and placed traps along the perimiter of fields S11 and FJL7 (these fields had not yet been planted).

Locations sampled in 2010

UTC (untreated control plot at the SWREC) planted April 8, 2010

Tri1 Planted -- April 8& 9 – FL1867 -- Thimet and Admire Pro at Planting; May 31 Baythroid; June 11 Movento and Pounce; June 18 Movento and Pounce; June 28 Asana; July 9 Endigo, July 20 Agri-Mek

S11 Planted -- April 27, 28 & 29 – FL1867 – Thimet and Admire Pro at Planting; June 9 Baythroid; June 16 Movento and Pounce; June 25 Movento and Pounce; July 5 Endigo, July 17 Agri-Mek, July 28 Thiodan and Pounce and Aug. 12 Agri-Mek and Pounce

FJL7 Planted – April 29& 30 – FL1867 – Thimet and Admire Pro at Planting; June 9 Baythroid; June 16 Movento and Pounce; June 25 Movento and Pounce; July 5 Endigo, July 17 Agri-Mek, July 28 Thiodan and Pounce and Aug. 12 Agri-Mek and Pounce

Key to Field Sample Reports --

Field name, total # adults on traps, # small nymphs, # large nymphs, total nymphs

Sample Results 2010

April 19 -- 2 adults collected on traps from UTC. 1 adult collected from trap 1 in field Tri1 and 2 adults collected from trap p1 in Tri1-- None of these psyllids were positive for Liberibacter. April 26 --- 5 adults collected on 5 traps in UTC. Nothing in traps from other fields (15 traps in Tri1, 10 traps in parimeter of S11 and 9 traps in parimeter of FJL7) . None of these psyllids were positive for Liberibacter. May 3 -- Put out remaining traps in fields S11 and FJL7 (5 traps along pivot road). No adult psyllids were collected on the traps this week. May 10-11 -- Potatoes beginning to emerge in UTC and Tri1. No adult psyllids were collected on the traps this week. (Total of 50 traps)

May 17 -- Still no emergence in S11 and FJL7 - Perimeter Traps 7a; Tri1 1a; FJL7 13a, S11 3a. -- 0/25 psyllids captured on the traps were positive for Liberibacter. May 24-25 -- Leaves collected from Tri1 -- took down perimeter traps. 4 adult psyllids were collected on the traps. Potato Psyllid Survey Report May 2010None of the psyllids were positive for Liberibacter.

June 1 -- Leaves collected from all fields. A light egg lay and development of small nymphs was noted in all the fields. Tri1 0a 7e 6s 0l 6t; S11 0a 4e 17s 0l 17t; Fjl7 0a 3e 0s 0l 0t and UTC 1a 1e 8s 0l 8t

June 7 - 0/52 psyllids captured on the traps were positive for Liberibacter.

Potato Psyllid Survey>UTC 6 14 2010

Potato Psyllid Survey>Commercial Field with Sticky Trap June 14, 2010

Untreated Control Plot June 14, 2010 Yellow Sticky Trap in Commercial Field

June 14 -- 36 adults were captured on the traps. Moderate numbers of all life stages on Tri1. None of the psyllids were positive for Liberibacter. Tri1 17a 12e 8s 0l 8t; S11 5a 5a 0e 0s 0l 0t; Fjl7 3a 0e 0s 0l 0t; UTC 11a 0e 3s 0l 3t

June 21 -- 30 adults were captured on the traps. Low numbers of all life stages including in the commercial fields and UTC. Tri1 - 12a 34e 11s 4l 15t; S11 - 4a 12e 1s 0l 1t; Fjl7 - 3a 0e 0s 0l 0t; Utc - 11a 0e 0s 1l 1t -- None of the psyllids were positive for Liberibacter.

June 27 -- Due to Hurricane Alex the lab in Texas was only able to process the sticky traps so far this week. -- Tri1 36a; S11 3a; Fjl7 2a and Utc 6a --- total of 47 adults

July 6 -- 62 adults were captured on the traps. Low numbers of all life stages including in the commercial fields and UTC -- Tri1 38a 13e 20s 0l 20t; S11 15a 3e 0s 0l 0t ;Fjl7 9a 6e 0s 0l 0t; and Utc 0a 1e 13s 0l 13t Psyllid Survey Report Through June -- 0/62 psyllids captured on the traps were positive for Liberibacter.

July 12 -- 106 adults were captured on the traps -- Tri1 46a 77e 39s 24l 63t; S11 45a 1e 0s 0l 0t; Fjl7 15a 28e 1s 0l 1t; and Utc 0a 0e 0s 0l 0t --- none of the psyllids captured on the traps were positive for Liberibacter.

Potato Psyllid Survey>Picture of field Tri1 - July 16, 2010 -- showing a strip where the potatoes have been harvested.

Potato Psyllid Survey>Picture of field S11 -- July 16, 2010

Tri1, July 16, 2010 S11, July 16, 2010

Note in the above picture taken on July 16, that harvest has started on Tri1.

July 19 -- 107 adults were captured on the traps.-- Tri1 32a17e 23s 11l 34t; S11 47a 3e 0s 0l 0t; Fjl7 24a 13e 12s 1l 13t and Utc 4ª 0e 0s 0l 0t -- Three of the adult psylids (from S11) were positive for positive for Liberibacter. This represents the first hot psyllids in in Garden City this year.

July 22 -- Potatoes in the Untreated Control Plot were harvested. --- None of the potatoes sampled (approx. 125 potatoes from each of 8 rows) were positive for ZC symptoms.

July 26 -- 10 adults were captured on the traps. -- Tri1 - 1e 4s 7l 11t; S11 7a 0e 0s 0l 0t and Fjl7 3a 3e 13s 3l 16t --- none of the adult psyllids were positive for Liberibacter..

August 2 -- 42 adults were captured on the traps. Tri1 --- 0e 3s 1l 4t; S11 28a 0e 0s 0l 0t and Fjl7 14a 5e 3s 1l 4t -- none of the adult psyllids were positive for Liberibacter. .. Psyllid Survey Report through July

August 9 -- 61 adults were captured on the traps from the two fields still being sampled -- S11 48a 0e 0s 0l 0t and Fjl 7 13a 2e 3s 1l 4t -- none of the adult psyllids were positive for Liberibacter. -- Less than 0.5% levels of ZC are being reported in the commercial fields

August 16 -- 9 adults were captured on the traps -- S11 5a 3e 0s 0l 0t and Fjl7 4a 4e 1s 0l 1t - none of the adult psyllids were positive for Liberibacter.

August 23 -- 4 adults were captured on the traps. -- S11 1a 0e 0s 1l 1t and Fjl7 3a 4e 4s 0l 4t - none of the adult psyllids were positive for Liberibacter.

August 30 -- S11 0a and Fjl7 0a 0e 1s 0l 1t - Potato Psyllid Survey Report 2010

Link to earlier reports -- Potato Psyllid Survey --

Archived Reports - June and July 2009

Archived Reports - April and May 2009

Archived Reports - August and September 2009

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