Some of the causes for the unsuccessful graft union are:
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It may be due to the anatomical mismatching between the stock and the scion.
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Sometimes the failure in the grafting techniques.
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The mechanical damages to the grafting plants results in the unsuccessful graft union.
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Due to the viral, bacterial or fungal infections.
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The adverse weather condition also affects the success of graft union.
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The grafting should be done under hygienic condition to become successful.
