christy hoepting and elizabeth buck · ne to mb ebto mb may‐9 jun‐7 jun‐20 jul‐5 8. 4flozx...
TRANSCRIPT
![Page 1: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/1.jpg)
ORDP Report No. 2:In‐Season Management of
Perennial Sow Thistle with Stinger
Christy Hoepting and Elizabeth BuckCornell Cooperative Extension Vegetable Program
Cornell Cooperative ExtensionVegetable Program
Empire Produce Expo, Syracuse, NY: January 21, 2014
Part 2 of 3
![Page 2: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/2.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
![Page 3: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/3.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
Treatment Rate Crop Stage Weed Stage Date1. Untreated Weedy Check2. Hand weeded Check 4‐leaf NE to EB Jun‐183B. Loop + Kill Plot:StingerStingerStingerStinger
4 fl oz8 fl oz8 fl oz8 fl oz
Loop2.5‐leaf4‐leaf7‐8 leaf
NE to ERNE to LRNE to MBEB to MB
May‐9Jun‐7Jun‐20Jul‐5
8. 4 fl oz x 4:StingerStingerStingerStinger
4 fl oz4 fl oz4 fl oz4 fl oz
2.5‐leaf4‐leaf6‐leaf7‐8 leaf
NE to LRNE to MBNE to EbudEB to MB
Jun‐7Jun‐20Jun‐27Jul‐5
9. 8 fl oz x 2:StingerStinger
8 fl oz8 fl oz
2.5‐leaf4‐leaf
NE to LRNE to MB
Jun‐7Jun‐20
![Page 4: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/4.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
Treatment Rate Crop Stage Weed Stage Date10. 16 fl oz x 1:Stinger 16 fl oz 4‐leaf NE to EB Jun‐2011: High‐Low + 4:Stinger StingerStinger
8 fl oz4 fl oz4 fl oz
2.5‐leaf4‐leaf6‐leaf
NE to LRNE to MBNE to Ebud
Jun‐7Jun‐20Jul‐5
12. Low‐High + 4:StingerStingerStinger
8 fl oz4 fl oz4 fl oz
2.5‐leaf4‐leaf7‐8 leaf
NE to LRNE to MBEB to Mbud
Jun‐7Jun‐20Jul‐5
15. Standard:StingerStinger
4 fl oz4 fl oz
4‐leaf6‐leaf
NE to LRNE to MB
Jun‐20Jul‐5
![Page 5: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/5.jpg)
1700
710
2080
280
7010
130
460
0
200
400
600
800
1000
1200
1400
1600
1800
1. Untreatedcheck
2. handweeded
3B. Kill plot 8. Max 16 4 x 49. Max 16 8 x 2 10. Max 16 16x 1
11. Max 16 Hi‐Low + 4
12. Max 16Low‐Hi + 4
15. Standard
Weed Biom
ass fresh weight (g/0.5m
2)
In‐Season Management of Perennial Sow Thistle:Weed Biomass (Aug‐13)
a
c
b
bc
cc
cc
bc
untreated
kill plot
hand weeded
Max 16Hi‐Low + 4
Max 16Low‐Hi + 4
standard:4 @ 4L4 @ 6L
Max 164 x 4
Max 168 x 2
Max 1616 x 1 @ 4L
In‐Season Management of Perennial Sow Thistle (Main)
![Page 6: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/6.jpg)
Ground Cover Measured by: No. live plants every foot per 2 transects per plot
![Page 7: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/7.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
64.9
98.7
8792.2
85.7
92.2 90.9
42.9
58.2
98.895.3
83.5
95.999.4
92.3
72.9
0
10
20
30
40
50
60
70
80
90
100
110
2. hand weeded 3B. Kill plot 8. Max 16 4 x 4 9. Max 16 8 x 2 10. Max 16 16 x1
11. Max 16 Hi‐Low + 4
12. Max 16 Low‐Hi + 4
15. Standard
% weed control
In‐Season Management of Perennial Sow Thistle:% Weed Control (Jul‐30 & Aug‐13)
% weed control (ground cover) Jul‐30 % control (fresh weight) Aug‐13
kill plot
hand weeded
Max 16Hi‐Low + 4
Max 16Low‐Hi + 4
standard:4 @ 4L4 @ 6L
Max 164 x 4 Max 16
8 x 2Max 16
16 x 1 @ 4L
1 2635 4
87
![Page 8: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/8.jpg)
• The most susceptible stage of perennial sow thistle to kill with Stinger pre‐solstice is the mid‐rosette stage.– 5‐9 leaves– 4‐7 inches in diameter
• Weed is self‐sufficient, not depending on parent rhizome for nourishment
In‐Season Management of Perennial Sow Thistle (Main)
![Page 9: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/9.jpg)
• Late‐rosette and early‐bolt stages of perennial sow thistle most difficult to control pre‐solstice.
• Energy flow is generally upward
In‐Season Management of Perennial Sow Thistle (Main)
Early Bolt plants are those with any sign of a vertical shoot up to about 6” tall.
Large rosette plants have many expanded leaves, are >7 inches across, and have not yet started to grow a flower stalk.
![Page 10: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/10.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
1. Untreated
Jun‐27‐3013 Jul‐30‐3013
![Page 11: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/11.jpg)
In‐Season Management of Perennial Sow Thistle (Main)15. Standard: Stinger 4 fl oz at 4‐leaf & 6‐leaf
Jul‐30‐3013
![Page 12: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/12.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
8. 4 fl oz x 4: Stinger 4 fl oz at 2.5‐leaf, 4‐leaf, 6‐leaf & 7‐8‐leaf
June 27, 2013
Killed 90% of rosettes
Early and mid‐bolt escapes with injury
Jul‐30: rhizomes not healthy
![Page 13: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/13.jpg)
In‐Season Management of Perennial Sow Thistle (Main)9. 8 fl oz x 2: Stinger 8 fl oz at 2.5‐leaf & 4‐leaf
June 27, 2013
90% kill overall, including rosettes and early‐bolt
![Page 14: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/14.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
12. Low+High + 4: Stinger 4 fl oz (2.5‐leaf) + 8 fl oz (4‐leaf) + 4 fl oz (6‐leaf)
June 27, 2013
60% kill overall, including rosettes and some early‐bolt.
Early‐bolt that escaped first app were not killed by the second app.
New emergence.
![Page 15: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/15.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
11. High‐Low + 4: Stinger 8 fl oz (2.5‐leaf) + 4 fl oz (4‐leaf) + 4 fl oz (6‐leaf)
June 27, 2013 plants that are dead above‐ground also have dead rhizomes
70% kill overall:Rosettes & some early‐bolt killed, minor new emergence, early‐bolt struggling to survive.
some root pruning
![Page 16: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/16.jpg)
June 27, 2013
High‐Low
Untreated
Low‐High
In‐Season Management of Perennial Sow Thistle (Main)
![Page 17: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/17.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
10. 16 fl oz x 1: Stinger 16 fl oz at 4‐leaf
Excellent below‐ground kill
Best control of large weeds pre‐solstice (LB) NE continued to grow untreatedJul‐30‐3013
![Page 18: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/18.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
10. 16 fl oz x 1: Stinger 16 fl oz at 4‐leaf
Aug‐7, 2013
![Page 19: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/19.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
3B. Kill Plot: Stinger 4 fl oz at loop + 8 fl oz (2.5‐leaf, 4‐leaf & 7‐8‐leaf)
Jul‐30‐3013
Stinger 8 fl oz eventually killed most of escapes from loop stage app. No NE. Best treatment overall!
![Page 20: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/20.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
2. Hand weeded at 4‐leaf (Jun‐18)
Jun‐27‐3013
Hand weeded when onions at 4‐leaf on Jun‐18
![Page 21: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/21.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
Hand weeding stimulates bud‐break on rhizomes
![Page 22: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/22.jpg)
In‐Season Management of Perennial Sow Thistle (Main)
2. Hand weeded at 4‐leaf
Compared to untreated, weeds in hand weeded plots were delayed, parent rhizomes had fewer adventitious roots and buds.
![Page 23: Christy Hoepting and Elizabeth Buck · NE to MB EBto MB May‐9 Jun‐7 Jun‐20 Jul‐5 8. 4flozx 4: Stinger Stinger Stinger Stinger 4 fl oz 4 fl oz 4floz 4oz fl 2.5‐leaf 4‐leaf](https://reader036.vdocuments.us/reader036/viewer/2022071210/6022324f9c233c0bdb3c1ad6/html5/thumbnails/23.jpg)
Future Research Plans:• Investigate 6 fl oz and 12 fl oz• Trial Starane and Garlon for feasibility of controlling perennial sow thistle in onions including efficacy and crop tolerance
• Investigate strategies to align susceptible weed stage with crop tolerance of growth regulator herbicides.
In‐Season Management of Perennial Sow Thistle