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United States Department of Agriculture

Agricultural Research Service

Title: Effects of Seed Treatment on Powdery Mildew, Yellow Dwarf and Yield of Winter Wheat in New York

item Bergstrom, G - CORNELL UNIVERSITY
item Gray, Stewart
item Vaughan, Richard

Submitted to: Fungicide and Nematocide Tests
Publication Type: Research Notes
Publication Acceptance Date: August 1, 1997
Publication Date: N/A

Technical Abstract: In 1995-96 seed treatments were evaluated on three New York farms (A, Musgrave Research Farm, Cayuga Co.; B, commercial farm, Orleans Co.; and C, commercial farm, Seneca Co.). A single certified lot of 'NY Batavia' was used for farms A and B, and a certified lot of 'Harus' was used for farm C. Seed treatments were applied by commercial seed treatment equipment. Seeds were sown on the dates specified below in drill strips approximately 6 ft x 110 ft L (A), 30 ft W x 800 ft L (B), and 30 ft W x 1200 ft L (C), with four (A and B) or three (C) replicates of each chemical treatments in a randomized complete block design. Planting rates were 2.25 to 2.50 bu seed per acre in moldboard plowed & harrowed ground following previous crops of spring oat (A), bean (B), and soybean (C). Grain drills were vacuumed between treatments to remove all seed of the prior treatment. Standard farmer practices were observed for starter & topdress fertilizer & herbicide application. Powdery mildew was assessed at GS2 (tillers begin) in November as the percentage of leaf area diseased. Aphid counts (alate & apterous) were made at three dates in fall 95. Virus incidence was assessed in fall 95 & spring 96 in composite (across reps) 60 plant samples using ELISA. One combine pass through each strip plot was harvested & weights determined with a Brent weighwagon. A subsample of the grain from each plot was removed for determination of percent moisture & test weight to recalculate yield in bushels per acre at 13.5% moisture. Data were subjected to analysis of variance & means separated using Fisher's protected LSD (P = 0.05).

Last Modified: 4/22/2015
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