Guidelines for Use of Foliar Sprays to Control Stripe Rust of Wheat in Australia

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Abstract
Guidelines were developed that advise Australian farmers when to spray wheat (T. aestivum) crops to control stripe rust (P. striiformis). These guidelines state that crops should be sprayed with a suitable fungicide when 1% of the leaf area is affected by stripe rust (equivalent to 35-40 affected leaves/100 examined) provided the predicted yield loss is sufficient to make spraying economical. Prediction of yield loss is based on the apparent infection rate in the cultivar and on the time in the growing season when 1% of the leaf area is affected by stripe rust.

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