SOYBEAN SEED TREATMENT TRIAL Kirk Reese Agronomy Research Manager Heartland Business Unit 2015

Transcription

1 SOYBEAN SEED TREATMENT TRIAL Kirk Reese Agronomy Research Manager Heartland Business Unit 2015

2 Introduction Compare current PPST plus; Clariva PN Seed Treatment ILeVo Seed Treatment Evaluate harvest stand and grain yield All locations combined SDS present at location (Y/N) Variety comparisons Varieties (grouped in pairs) P24T05R, P25T51R (6 locations) P33T72R, P34T07R2 (31 locations) P39T67R, 93Y92 (11 locations) Means with different letters or followed by an asterisk* are significantly different at P<0.20 using Student s t-test

3 Harvest Stand Among Treatments Harvest stand measured at 14 locations Although there was a ~3% stand loss for ILeVo, it was not significantly different when compared among all treatments. Harvest stand = N.S.

4 Demonstration plot Lexington, IL August 3, 2015 R4 stage FST + IST + PPST inches high, 18 nodes FST + IST + PPST ILeVO 43 inches high, 17.8 nodes

5 Yield X SDS Presence Where Sudden Death Syndrome was not present, there was an incremental increase in yield with ILeVo seed treatment compared to Clariva. (P<0.20, 39 locations) Where Sudden Death Syndrome was present, there was a significant increase in yield with ILeVo seed treatment (+ 4.6 Bu/A, P<0.20, 6 locations) when compared to PPST and Clariva.

6 P24T05R and P25T51R No difference among treatments for P24T05R, all locations Significant 3.7 Bu/A yield increase for P25T51R/ILeVo treatment compared among other seed treatments, all locations combined (P<0.20) SDS Scores: P24T05R = 6, P25T51R = 5

7 P33T72R and P34T07R2 No difference among treatments for P34T07R2, all locations Significant 2 and 2.6 Bu/A yield increase for P33T72R/ILeVo treatment compared among PPST and Clariva, respectively, all locations (P<0.20) SDS Scores: P33T72R = 5, P34T07R2 = 6

8 93Y92 and P39T67R Significant 1.9 and 2.7 Bu/A yield increase for 93Y92/ILeVo treatment compared among PPST and Clariva, respectively, all locations (P<0.20) Significant 2.5 and1.9 Bu/A yield increase for P39T67R/ILeVo treatment compared among PPST and Clariva, respectively, all locations (P<0.20) SDS Scores: Both = 6

9 Conclusions No significant difference in harvest stand among treatments Incremental increase in grain yield with ILeVo seed treatment when compared to other seed treatments and SDS was not present Significant (P<0.20) 4.6 Bu/A grain yield increase with ILeVo seed treatment when compared to other seed treatments and SDS was present Varieties with lower SDS scores (P33T72R, P25T51R) tended to respond favorably to ILeVo when compared to other seed treatments and varieties with higher SDS scores P39T67R and 93Y92 both responded favorably to ILeVo, likely due to higher SDS and/or SCN pressure at those locations Clariva seed treatment did not offer any significant yield benefit when compared to standard PPST. ILeVo had significantly higher yield than Clariva in most cases. These data suggest that regardless of SDS pressure, there is an economic benefit to using ILeVo, especially for varieties with lower SDS scores.