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Nutrient deficiency symptoms in plant tissues can often be confused with pest damage (A, nitrogen deficiency in carambola; B, magnesium deficiency in sorghum and Cucurbita; and C, sulfur deficiency in pigeon pea). Lack of nutrient availability or access (due to pH or soil texture) cause discolorations or other changes in plant appearance that are unrelated to pest damage. For more information about diagnosing nutrient deficiencies in the field, see Asia Note #29 [http://edn.link/drjqee].