Volume:
3
Issue:
4
Date:
July 28, 2011
Potato Bytes
Klamath Basin Research and Extension Center
6941 Washburn Way
Klamath Falls, Oregon 97603
(tel)541-883-4590 (fax) 541-883-4596
http://oregonstate.edu/dept/kbrec
Brian A. Charlton, Research and Extension Agent - 541-591-1255
Inside this issue:
Potato Crop Water Use
Early Planting
0.30
inch/day
0.25
0.20
0.15
'99-'10 Avg
0.10
2011
Crop Water Use
1
Insect Trap Report
2
Soil Degree Data
3
Brian’s Notes
4
0.05
0.00
5/15
6/15
7/15
8/15
Historical P-day Accumulation
June 1 -September 15
9/15
Potato Crop Water Use
Late Planting
0.30
inch/day
0.25
0.20
0.15
'99-'10 Avg
0.10
2011
0.05
720
700
680
660
640
620
600
580
560
540
520
0.00
NOAA
AgriMet
87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10
6/5 6/19 7/3 7/17 7/31 8/14 8/28 9/11 9/25
KBREC
Inches
Last 3 days:
Early
0.72
500
Late
0.62
Last 7 days:
1.65
1.36
Last 14 days:
2.93
2.28
300
May 15
June 1
200
June 15
100
Estimated Water Use:
Next 7 days:
400
p-days
Actual Water Use:
Planting Date:
Total P-Day Accumulation
Estimated Emergence - July 28
1.68
1.47
0
2007
2008
2009
2010
2011
Insect Trap Report
July 21 - July 27
Klamath County
TRAP
1
2
3
4
5
6
7
8
9
LOCATION
Township Rd
Casebeer Rd
Hwy. 39 - Henley
Hwy. 39 - Merrill
Anderson Rd.
Payger Rd.
N. Malin Rd.
Morelock Rd.
Spring Lake Rd.
PTW
0
0
0
0
0
0
0
0
0
BLH
0
0
0
1
0
3
1
0
0
OLH
7
2
10
4
7
5
4
12
5
PSY
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
0
5
16
15
5
0
2
0
0
0
0
0
0
Potato
15
12
18
NA
10
2
24
NA
0
3
6
GPA
0
2
0
NA
0
0
1
NA
0
0
0
Other
18
18
32
NA
15
3
22
NA
0
22
37
PTW: Potato Tuberworm
BLH: Beet Leafhoppers
OLH: Other Leafhoppers
PSY: Psyllid
Modoc and Siskiyou
1
2
3
4
5
Co. Rd. 110
Frog Pond
S.W. Sump
Copic Bay
Co. Rd. 102
L. of Nations
Aphid Traps
1
2
3
4
5
6
7
8
9
10
11
Running Y
Lower Lake - North
Lower Lake - South
West Malin
Malin - Turkey Hill
East Malin
South Poe Valley
Bonanza
Yonna Valley
Henley
Henley
GPA: Green Peach Aphid
Soil Degree-Day Accumulation -- KBREC and IREC 2011
For Root-knot nematode control, Vydate applications should begin at 800 degree-days (DD5C).
To estimate that date, add the number of Total degree-days "Total" on the day you planted
to 800. Where that value occurs in the "Total" column estimates the date on which 800 DD5C
will occur in that field. It is recommended that applications continue every 14 days until harvest.
For Stubby-root nematode control, Vydate applications should begin at 0 degree-days (at planting)
and followed by an application at the first full irrigation following emergence. An additional
application is recommended at 800 degree-days (DD5C).
Contacts for Questions: Brian A. Charlton (541)883-4590 - office or (541)591-1255 - cell
Darrin Culp (541)883-7131 - office
KBREC DD5C IREC DD5C
Date
KBREC DD5C
Daily Total Daily Total Date
IREC DD5C
KBREC DD5C
IREC DD5C
KBREC DD5C
IREC DD5C
Daily Total Daily Total Date
Daily Total
Daily Total Date
Daily Total Daily Total
4/15/11 1.4
1.4
NA
NA
5/11/11
5.7
88.4
NA
NA
6/6/11
9.2
253.5
NA
NA
7/2/11
14.6
598.0 NA
NA
4/16/11 2.3
3.6
NA
NA
5/12/11
6.5
94.9
NA
NA
6/7/11
9.6
263.1
NA
NA
7/3/11
15.8
613.8 NA
NA
4/17/11 3.2
6.8
NA
NA
5/13/11
6.7
101.6 NA
NA
6/8/11
10.5
273.5
NA
NA
7/4/11
16.5
630.3 NA
NA
4/18/11 3.1
9.9
NA
NA
5/14/11
6.1
107.7 NA
NA
6/9/11
11.2
284.8
NA
NA
7/5/11
16.7
647.0 NA
NA
4/19/11 2.5
12.4
NA
NA
5/15/11
4.2
112.0 NA
NA
6/10/11
12.8
297.6
NA
NA
7/6/11
15.9
662.4 NA
NA
4/20/11 2.1
14.5
NA
NA
5/16/11
3.6
115.6 NA
NA
6/11/11
11.7
309.3
NA
NA
7/7/11
16.4
679.3 NA
NA
4/21/11 1.5
16.1
NA
NA
5/17/11
4.0
119.6 NA
NA
6/12/11
11.2
320.5
NA
NA
7/8/11
15.8
695.1 NA
NA
4/22/11 1.7
17.8
NA
NA
5/18/11
4.2
123.8 NA
NA
6/13/11
12.8
333.2
NA
NA
7/9/11
16.1
711.2 NA
NA
4/23/11 2.1
19.8
NA
NA
5/19/11
5.6
129.4 NA
NA
6/14/11
13.1
346.4
NA
NA
7/10/11
15.6
726.7 NA
NA
4/24/11 2.8
22.6
NA
NA
5/20/11
7.2
136.6 NA
NA
6/15/11
13.3
359.6
NA
NA
7/11/11
14.3
741.0 NA
NA
4/25/11 2.9
25.6
NA
NA
5/21/11
8.5
145.1 NA
NA
6/16/11
12.9
372.5
NA
NA
7/12/11
13.6
754.6 NA
NA
4/26/11 2.4
28.0
NA
NA
5/22/11
7.9
153.1 NA
NA
6/17/11
13.3
385.8
NA
NA
7/13/11
13.4
768.0 NA
NA
4/27/11 3.3
31.2
NA
NA
5/23/11
7.3
160.4 NA
NA
6/18/11
12.9
398.7
NA
NA
7/14/11
12.4
780.4 NA
NA
4/28/11 3.1
34.3
NA
NA
5/24/11
6.6
166.9 NA
NA
6/19/11
12.8
411.5
NA
NA
7/15/11
12.4
780.4 NA
NA
4/29/11 1.9
36.2
NA
NA
5/25/11
6.0
173.0 NA
NA
6/20/11
14.0
425.5
NA
NA
7/16/11
12.6
793.0 NA
NA
4/30/11 1.9
5/1/11 3.1
38.1
41.2
NA
NA
NA
NA
5/26/11
5/27/11
4.7
7.3
177.7 NA
185.0 NA
NA
NA
6/21/11
6/22/11
14.8
14.6
440.3
454.9
NA
NA
NA
NA
7/17/11
7/18/11
12.1
12.2
805.1 NA
817.3 NA
NA
NA
5/2/11
4.3
45.5
NA
NA
5/28/11
6.0
191.0 NA
NA
6/23/11
15.4
470.3
NA
NA
7/19/11
11.8
829.1 NA
NA
5/3/11
4.1
49.6
NA
NA
5/29/11
6.4
197.4 NA
NA
6/24/11
14.8
485.1
NA
NA
7/20/11
11.4
840.5 NA
NA
5/4/11
4.9
54.5
NA
NA
5/30/11
6.6
204.1 NA
NA
6/25/11
14.8
500.0
NA
NA
7/21/11
10.8
851.4 NA
NA
5/5/11
5.4
59.9
NA
NA
5/31/11
6.5
210.6 NA
NA
6/26/11
15.6
515.6
NA
NA
7/22/11
10.5
861.9 NA
NA
5/6/11
5.4
65.3
NA
NA
6/1/11
5.5
216.0 NA
NA
6/27/11
16.4
532.0
NA
NA
7/23/11
10.6
872.5 NA
NA
5/7/11
5.1
70.4
NA
NA
6/2/11
6.0
222.1 NA
NA
6/28/11
14.9
546.8
NA
NA
7/24/11
11.1
883.6 NA
NA
5/8/11
4.4
74.8
NA
NA
6/3/11
7.0
229.1 NA
NA
6/29/11
12.6
559.4
NA
NA
7/25/11
11.7
895.3 NA
NA
5/9/11
3.4
78.2
NA
NA
6/4/11
7.2
236.3 NA
NA
6/30/11
11.7
571.1
NA
NA
7/26/11
12.3
907.6 NA
NA
5/10/11 4.6
82.7
NA
NA
6/5/11
8.0
244.3 NA
NA
7/1/11
12.3
583.4
NA
NA
7/27/11
11.5
919.0 NA
NA
Brian’s Notes
Insect Trap Reports: Aphid numbers in yellow pan traps are high for most locations and control measures are recommended
for most sites.
Soil Degree-Day Accumulation: Potatoes planted around May 23 are approaching the 800 degree-day target. If you planted
near this date be thinking of making an application on your next scheduled irrigation. Be sure to check weekly as these values
are updated.
P-day Accumulation: P-days are a measure of potato physiological growth from the time of emergence. Research data has
shown a strong correlation with 300 pdays and the onset of Early Blight. Potatoes which emerged in mid-June are approaching
this target. A preventative fungicide might be warranted if you routinely experience problems with this disease as the target is
getting close.
Oregon State University Extension Service offers educational programs, activities, and materials without discrimination based on age, color, disability, gender identity or expression, marital status, national origin, race, religion, sex,
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Potato Bytes published by: Brian A. Charlton, Research and Extension Agent 541-591-1255
If you cannot reach Brian. Call - Darrin Culp, Fac. Res. Asst 541-539-0176