EFFECTS OF CYCOCEL (CCC) AND FUNGICIDE SPRAYS ON SPRING WHEAT GROWN AT THREE NITROGEN LEVELS

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Abstract
Spring wheat (Triticum aestivum L. ’Opal’) was grown at three N levels, 80, 120, and 160 kg N/ha, to evaluate effects of Cycocel (CCC) and fungicide sprays in a 2-yr test. CCC decreased yields, in the absence of lodging, by increasing disease severity. Fungicides decreased disease severity while increased levels of N increased the severity of powdery mildew. The combination of high N plus fungicides produced the highest yields because the healthier plants gave greater responses to higher levels of N than did diseased plants. Levels of N above the 80 kg/ha rate did not increase yield of Opal wheat in the absence of appropriate fungicide sprays.

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