Fungicide Chemigation Trials

Transcription

1 Fungicide Chemigtion Trils UNL South Centrl Agriculturl Lb Cly Center, NE Tmr Jckson Extension Plnt Pthologist University of Nebrsk-Lincoln

2 Fungicide Chemigtion Trils Tble of Contents Contents Slide Introduction 3 Disese Notes 4 Tril Design, Notes, nd Dt Collection 7 Yield Kernel Weight 17 Disese Severity 20 Sty Green % t 100% 22 Lodging 23 Moisture % 24 Acknowledgments 25

3 Introduction Bckground The incresed use of folir fungicides in corn hs led to questions regrding the differences between fungicide pplictions mde vi chemigtion or by ground. This tril ws initited in response to these questions nd compred pyrclostrobin (Hedline ) efficcy when pplied by chemigtion or ground.

4 Disese Notes Gry Lef Spot 2005 predominnt folir disese t low/moderte severity 2006 minor compred to southern rust nd low/moderte severity 2007 predominnt folir disese t moderte severity

5 Disese Notes Common Rust 2005 minor disese t low severity 2006 minor compred to southern rust nd t low severity 2007 minor disese t low severity

6 Disese Notes Southern Rust 2005 not detected 2006 moderte/severe nd predominnt disese in this tril this yer 2007 minor disese t low severity

7 Chemigtion Trils Importnt Dtes Hedline (pyrclostrobin) used in ll trils Asgrow RX752 RR2/YGPL GLS rting 7 (Fir) Plnted: My 14, 2007 Appliction Dte: July 20, 2007 Hrvested: October 30, NC RB Plnted: My 5, 2006 Appliction Dte: July 18, 2006 Hrvested: October 13, Asgrow RX 752 YG Plnted: April 27, 2005 Appliction Dte:???? Hrvested: October 5, 2005

8 Chemigtion Trils Tretment List 4 TREATMENTS 1. Non-Treted 2. 6 oz Hedline t VT with 0.25 chemigtion wter 3. 6 oz Hedline t VT with 0.50 chemigtion wter 4. 6oz Hedline t VT vi ground pplictoin v/v NIS 3 Reps, 4 Tretments 20 (8 rows b/t plots) x 23 long All tretments pplied t Tssel (VT) The ground ppliction of Hedline (tretment 4) ws pplied with CO 2 -pressurized spryer nd 10 ft wide hnd-held boom with six Hypro Twincp TJ XR11001 nozzles spced t 20-in. prt nd 12-in. bove the cnopy. Spry volume ws 15 gl/a t pressure of 38 psi.

9 Fungicide ChemigtionTrils Liner overhed sprinkler irrigted Chemigtion tretments were injected t nozzle s illustrted with venturitype injector Ground pplictions mde by bckpck spryer t 38 psi nd 15 gp Middle rows hrvested for yield Plots = 12 rows x 50 3 reps

10 Fungicide ChemigtionTrils Dt Collection Disese severity = % totl lef re covered by disese lesions or rust pustules Grin mechniclly hrvested nd djusted to 15.5% moisture Sty green mesured s % plnts green fter beginning senescence % moisture mesured in combine t hrvest Lodged plnts per plot (%) estimted t hrvest

11 10 ft. Nozzle nd Tretment Digrm Drop Tubes 150 ft. Liner System Spn 20 hrvest rows 20 hrvest rows Distribution pttern with 2 tretments cross the spn (CORN)

12 Tretment Overlp nd Hrvest Rows Digrm 60 Rows/spn Circles re 40 ft. sprinkler wetted re, 2 tretments wide noted by colors, one sprinkler plugged between tretments. Blue lines would be hrvest rows

13 2007 Chemigtion Tril in NE Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/07 High winds (> 90 mph) impcted this loction August 23, 2007 cusing vrious degrees of crop injury, including lef ripping nd low incidence of lodging. The third folir disese rting ws completed just prior to the storm.

14 Chemigtion Tril Yield Asgrow RX 752 YG Plnted 4/27/ bu/a Non-treted 0.25 Chemigtion Tretment 0.50 Chemigtion All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE Ground Applicton % NIS

15 2006 Chemigtion Tril Yield NC RB Plnted 5/5/ (bu/a) Non-treted 0.25 Chemigtion Tretements 0.50 Chemigtion All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE Ground Applicton NIS

16 Chemigtion Tril Yield Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/07 Yield (bu/a) Non-treted Ground 4 Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

17 Chemigtion Tril 500 Kernel Weight Asgrow RX 752 YG Plnted 4/27/ Weight (grms) Non-treted Ground 4 Chemigtion Tretment Chemigtion Applicton NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

18 Weight (grms) Chemigtion Tril 500 Kernel Weight NC RB Plnted 5/5/ Non-treted Ground Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

19 2007 Chemigtion Tril 500 Kernel Weight Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/ Weight (grms) b 151 b b Non-treted 0.25 Chemigtion Tretment 0.50 Chemigtion All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE Ground Applicton NIS

20 % Lef Are 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% 2007 Chemigtion Tril Grey Lef Spot Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/07 4.8% 21.0% 12.0% 15.0% 4.0% 4.5% 4.0% 1.0% 1.0% 1.0% 1.0% 9.0% Non-treted Ground Chemigtion Chemigtion Applicton Tretment NIS 7/15 7/31 8/21 All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

21 2005 Chemigtion Tril Grey Lef Spot Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 4/27/05 % Lef Are 25% 20% 15% 10% 5% 20% b 17% b 13% 10% 10% 10% 10% 10% 10% 10% 10% b 17% 7/15 7/21 8/16 0% Non-treted 0.25 Chemigtion 0.50 Chemigtion Tretment All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE Ground Applicton NIS

22 25.0% 2007 Chemigtion Tril Common Rust Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/ % % of Lef Are 15.0% 10.0% 5.0% 0.0% 3.5% 4.0% 1.7% 2.0% Non-treted Ground 4 Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) Southern rust occurred t low severity (< 2%) South Centrl Agriculturl Lb ner Cly Center, NE

23 % of Green Lef Are 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% 2007 Chemigtion Tril Sty Green Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) 10.25% Plnted 5/14/ % 35.00% 44.00% Non-treted Ground 4 Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

24 % of Popultion Lodged 60% 50% 40% 30% 20% 10% 0% 2007 Chemigtion Tril Lodging Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) 56.25% Plnted 5/14/ % 28.33% 12.67% Non-treted Ground 4 Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

25 18% 15% 2007 Chemigtion Tril Moisture Percentge Asgrow RX752 RR2/YGPL (GLS rting 7/Fir) Plnted 5/14/ % 16.35% 16.53% 16.23% % of Moisture 12% 9% 6% 3% 0% Non-treted Ground 4 Chemigtion Chemigtion Applicton Tretment NIS All Applictions were of 6 oz Hedline t VT (Tsseling) South Centrl Agriculturl Lb ner Cly Center, NE

26 Acknowledgments Trvis Gustfson, Reserch Technologist Doug Miller, former Reserch Technologist UNL-SCAL Stff nd Fculty Perry Ridgwy Dvid Althouse Numerous other hourly employees

27 Deprtment of Plnt Pthology University of Nebrsk-Lincoln Institute of Agriculture nd Nturl Resources