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First observations on lateral collar rot of sugar beet in Morocco

, : First observations on lateral collar rot of sugar beet in Morocco. Awamia (43): 95-107

Collar rot of sugar beet in Morocco starts with an infestation of seedlings by Ditylenchus dipsaci causing swelling below the cotyledons and brown patches at the base of the petiole. Later, rotting extends into the tissues and one or more leaves may wilt and die. Damage occurs chiefly in seedlings sown early (September and October) and is more severe in March and April. Later, when the weather becomes hot, the plants partially recover.


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