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Different severities of HR-like necrosis after application of ARG homogenate or anti-aphrodisiac compounds. Surface area of necrotic tissue and intensity of necrosis was assessed using a relative scale: (A) weak (HR+): no or little necrotic tissue on upper leaf side, (B) medium (HR++): larger parts of treated area with brownish necrotic tissue on upper leaf side, and (C) strong necrosis (HR+++): almost whole treated area necrotic on both sides.
