Investigations of Early Season Herbicide, Fungicide, & Fertilizer Co-applications in Field Corn. Craig Solomon & Kevin Bradley University of Missouri

Transcription

1 Investigations of Early Season Herbicide, Fungicide, & Fertilizer Co-applications in Field Corn Craig Solomon & Kevin Bradley University of Missouri

2 Research Outline Two Separate Field Studies: Influence of V5 Herbicide and Fungicide Applications on Corn Injury and Corn Yield. Herbicides: Realm Q, Capreno, Callisto,, + Capreno, + Atrazine,, Fungicides: Stratego Yld, Quilt Xcel, Headline AMP Influence of V5 Herbicide, Fungicide, and Fertilizer Applications on Corn Yield. Herbicides:,,, Fungicides: Stratego Yld, Quilt Xcel, Headline AMP Slow Release N: Nitamin

3 Corn Height Reduction (% of Untreated) Influence of V5 Herbicide + Fungicide Applications on Corn Height Reduction 7 Days After Application (Columbia, MO 211) 25 Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

4 Corn Height Reduction (% of Untreated) Influence of V5 Herbicide + Fungicide Applications on Corn Height Reduction 7 Days After Application (Columbia, MO 212) 25 Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

5 Untreated 3 ozs Capreno + 4 ozs Stratego Yld

6 Visual Chlorosis (%) Influence of V5 Herbicide + Fungicide Applications on Visual Chlorosis 7 Days After Application (Columbia, MO 211) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

7 Visual Chlorosis (%) Influence of V5 Herbicide + Fungicide Applications on Visual Chlorosis 7 Days After Application (Columbia, MO 212) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

8 Corn Yield (Bu/A) Influence of V5 Herbicide + Fungicide Co- Applications on Corn Yield (Columbia, MO 211) 14 Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide LSD (.5)= No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

9 Corn Yield (Bu/A) Influence of V5 Herbicide + Fungicide Applications on Corn Yield (Columbia, MO 212) 35 3 Stratego YLD (4 floz/a) Quilt Xcel (1.5 floz/a) Headline AMP (1 floz/a) No Fungicide LSD (.5)= No Herbicide Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

10 Corn Yield (Bu/A) Influence of V5 Herbicide Applications on Corn Yield When Averaged Across all Fungicide Treatments (Columbia, MO 211) a 115 abc bc ab LSD (.5)=7 abc abc bc abc abc Weed-free Control Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

11 Corn Yield (Bu/A) Influence of V5 Herbicide Applications on Corn Yield When Averaged Across all Fungicide Treatments (Columbia, MO 212) 35 3 LSD (.5)= Weed-free Control Realm Q (4 oz/a) Capreno Callisto ( 3 fl oz/a) + Aatrex (1 qt/a)

12 Influence of V5 Fungicide Applications on Corn Yield When Averaged Across all Herbicide Treatments (Columbia, MO 211) Corn Yield (Bu/A) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide 14 LSD (.5)= All Herbicides

13 Influence of V5 Fungicide Applications on Corn Yield When Averaged Across all Herbicide Treatments (Columbia, MO 212) Corn Yield (Bu/A) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide 35 LSD (.5)= All Herbicides

14 Corn Yield (Bu/A) Influence of V5 Herbicide + Fungicide + Nitamin Combinations on Corn Yield (Columbia, MO 211) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide 14 LSD (.5)= No Herbicide (22 oz/a) (3 oz/a) (22 oz/a) (22 oz/a) No Herbicide + Nitamin (2 gal/a) + Nitamin (2 gal/a) (22 oz/a) (3 oz/a) + Nitamin (2 gal/a) (22 oz/a) + Nitamin (2 gal/a) (22 oz/a) + Nitamin (2 gal/a)

15 Corn Yield (bu/a) Influence of V5 Herbicide + Fungicide + Nitamin Combinations on Corn Yield (Columbia, MO 212) 9 8 Stratego YLD (4 floz/a) Quilt Xcel (1.5 floz/a) Headline AMP (1 floz/a) No Fungicide LSD (.5)= No Herbicide (22 oz/a) (3 oz/a) (22 oz/a) (22 oz/a) No Herbicide + Nitamin (2 gal/a) + Nitamin (2 gal/a) (22 oz/a) (3 oz/a) + Nitamin (2 gal/a) (22 oz/a) + Nitamin (2 gal/a) (22 oz/a) + Nitamin (2 gal/a)

16 Influence of V5 Herbicide Applications on Corn Yield When Averaged Across all Fungicide and Nitamin Treatments (Columbia, MO 211) Corn Yield (Bu/A) a a b 115 ab LSD (.5)=7 ab No Herbicide

17 Influence of V5 Herbicide Applications on Corn Yield When Averaged Across all Fungicide and Nitamin Treatments (Columbia, MO 212) Corn Yield (Bu/A) LSD (.5)= No Herbicide

18 Corn Yield (Bu/A) Influence of V5 Fungicide Applications on Corn Yield When Averaged Across all Herbicide and Nitamin Treatments (Columbia, MO 211) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide LSD (.5)= All Herbicides +/- Nitamin

19 Corn Yield (Bu/A) Influence of V5 Fungicide Applications on Corn Yield When Averaged Across all Herbicide and Nitamin Treatments (Columbia, MO 212) Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide LSD (.5)= All Herbicides +/- Nitamin

20 Corn Yield (Bu/A) Influence of V5 Fungicide Applications on Corn Yield in Both Trials Conducted in Stratego YLD (4 fl oz/a) Quilt Xcel (1.5 fl oz/a) Headline AMP (1 fl oz/a) No Fungicide LSD (.5)= 6 LSD (.5)= Trial 1 Trial 2

21 Corn Yield (Bu/A) Influence of V5 Fungicide Applications on Corn Yield in Both Trials Conducted in Stratego YLD (4 floz/a) Quilt Xcel (1.5 floz/a) Headline AMP (1 floz/a) No Fungicide LSD (.5)= LSD (.5)= Trial 1 Trial 2

22 Corn Yield (Bu/A) Influence of V5 Nitamin Application on Corn Yield (211 and 212, Columbia) LSD (.5)= Nitamin (2 gal/a) No Nitamin 8 6 LSD (.5)= All Herbicide + Fungicide Treatments (211) All Herbicide + Fungicide Treatments (212)

23 Further Considerations Fungicides are most profitable in corn when a combination of factors are present: Disease susceptible hybrids Continuous corn No-till or reduced tillage systems Late-planted corn Weather conditions that favor disease development (i.e. heavy dews, high humidity, wet season)

24 Further Considerations Previous research suggests a single VT application will provide the same yield benefits as a V6+VT application.

25 Final Thoughts Estimated cost per product: Stratego Yld (4 fl oz/a) = $18/A Quilt Xcel (1.5 fl oz/a) = $2/A Headline AMP (1 fl oz/a) = $2/A Minimum 3-4 Bu/A yield increase required to breakeven.