187-15 SAR INDUCTION and MYCORRHIZAL Stimulation: EFFECTS On GROWTH and YIELD In Irish Potatoes.



Tuesday, October 18, 2011
Henry Gonzalez Convention Center, Hall C, Street Level

Paul Bystrak, Plant Health Care, Inc., Salisbury, MD, Ned French, Plant Health Care, Inc., Little Rock, AR and Jimmy Laska, Plant Health Care, Inc., Tifton, GA
In nine replicated, small plot trials in ID and WA conducted during 2009, effects of a mycorrhizal stimulant (formononetin) and a Systemic Acquired Resistance inducer (HRPNαβ – ‘harpin’) alone or in combination were evaluated in Irish potato.  Treatments included three rates of formononetin (Myconate® ST) applied to seed pieces at planting, two foliar timing regimes of harpin (Employ®), and a combination of one formononetin rate with one timing regime of harpin.  Compared with the untreated control, treatments had no effect on stand, stem number, vigor and plant height; however, treatments increased root weight from 6% to 15%, increased tuber set from 10% to 28%, and increased gross yield by 2% to 8%.  Highest gross yields were achieved with the combination entry, but highest marketable yields were achieved with 3 foliar applications of harpin.  Yield increases were attributed primarily to increased set.  Marketable yields were improved more than gross yields, demonstrating an increase in quality and improved crop value.
See more from this Division: ASA Section: Agronomic Production Systems
See more from this Session: General Agronomic Production Systems: II