The hyphae of Aspergillus are

(a) Parenchyma (b) Chlorenchyma  (c) Plectenchyma (d) Collenchyma  Answer. (c) Plectenchyma (Pseudoparenchyma) is nothing but the interwoven mass of fungal mycelium which in cross-section look like parenchyma.  (108)

(a) Colletotrichum falcatum  (b) Phytophthora infestans  (c) Potato mosiac virus  (d) Alternaria solani  Answer. (b) Late blight of potato is a seed born disease which is caused by Phytophthora infestans. The disease is characterised by brownish to blackish dead areas …

(a) Root knot disease – Meloidogyne javanica  (b) Smut of bajra – Tolysporium penicillariae  (c) Covered smut of barley – Ustilage nuda  (d) Late blight of potato – Phytophthora infestans  Answer. (c) Covered smut of barley is caused by Ustilago …