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How to appraise and correct vineyard biological problems that cause decline

What is a vineyard decline?
-Vineyard decline is a complex problem that can be found in most vineyards. The degree of decline can vary from a few vines to large acreages.
-Decline causes economic losses to the grower.
-Decline can be caused by soil conditions, poor irrigation practices, nutritional deficiencies or excesses, or biological factors, or a combination of these.
-This publication will discuss the common biological factors causing decline.

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