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Micronutrients on Spring Dry Pea Seed

Bill Flory
with Larry J. Smith, UI/Nez Perce County Extension

Objective

Test seed applied micronutrients on spring dry peas to escape pea leaf weevil damage and to increase seed yield.

Location: Winchester, Idaho
Annual precipitation: 26 inches per year
Rotation: Pea, wheat
Dry Spring Pea Variety: Columbian

Treatment

Micronutrient - Dry pea seed treated with Wilks Micronutrients Plus Captan-Moly.
Check - Dry pea seed treated with Captan-Moly.

Comments

Wilks Micronutrients seed dressing is intended to increase emergence, vigor and the ability of dry peas to better withstand the ravages of pea leaf weevil. The Micronutrient and Check treatments had the same planting date (early). Pea leaf weevil numbers did not warrant insecticidal treatments for either the Micronutrient or Untreated Check replicates.

Data

Yield, lb/ac

Treatment Rep 1 Rep 2 Rep 3 Rep 4 Average

Wilks Micronutrient 2020 2323 2222 1717 2071a

Untreated Check 1853 2020 2424 1717 2004a

LSD(5%) 347

CV 7.6%

Conclusion

Pea leaf weevil damage approached threshold levels for insecticide treatment; however, threshold levels were not reached to warrant insecticide application to either the Micronutrient or untreated replicates. Under these conditions, there was no significant yield advantage for the Micronutrient seed dressing.

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Hans Kok, WSU/UI Extension Conservation Tillage Specialist, UI Ag Science 231, PO Box 442339, Moscow, ID 83844 USA Redesigned by Leila Styer, CAHE Computer Resource Unit; Maintained by Debbie Marsh, Dept. of Crop & Soil Sciences, WSU