![]() infestans causes 5-15 mm deep rotting in tubers. Dry rot: Bluish-black and reddish-brown fungal growth develop outside and inside of the potato tuber.Later, leaves start falling and rotting in tubers also occur.Within several days (generally 1-4), leaf rotting occurs by the development of tan coloured blisters (in dry weather) and growth of blue-grey mycelium (in moist weather).In certain areas of the plant, leaf blistering may occur.The lower leaf develops brown and black lesions.The appearance of watery, light green or yellow blisters on the leaf foliage.The signs and symptoms of late blight in potatoes include the following: ![]() The infection or late blight in potatoes may occur at any stage of plant growth. The foliage becomes shrivelled in dry climatic conditions, whereas leaves become dead and give a foul smell in moist conditions. ![]() Then, the plant foliage acquires rapid blistering. When the pathogen gets favourable conditions, lesions proliferate, and the infection spreads upward from the lower leaves and petioles. We can see blisters or lesions on leaves as small dead spots with varying colours (brown to purple-black) during this stage.īesides the plant foliage (including veinlets and margins), the infection also spreads to the areas like rachis, petiole and stem. Phytophthora infestans predominantly attack plant foliage.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |