Question

6. Red rust of coffee is due to the harmful activity of algae

(a) chlorella (b) chondrus crispus (c) cephaleuros virescens (d) gracileria6. Red rust of coffee is due to the harmful activity of algae

(a) chlorella (b) chondrus crispus (c) cephaleuros virescens (d) gracileria​

Answer 1

Answer:

Red rust on tea is caused by the parasitic filamentous green algae, Cephaleuros parasiticus. Commonly referred to as "red rust", this alga with its 14 species is parasitic to important economic plants, such as tea, coffee, mango, guava and causes damage such as algal growth on leaves, killing new shoots or disfiguring fruit. The disease cycle starts when the hosts are inoculated with sporangia are deposited on susceptible host tissues. When under moist conditions, the motile zoospoores are released from the sporangia, they penetrate the host cuticle and form disc like algal thalli with threadlike algal filaments. At the affected parts of the plant, finds reduction in photosynthetic activity and defoliation. The effects of the spots on plants are reduced photosynthetic area of leaves, defoliation.

Answer 2

Answer:

answer C

Explanation:

cephaleuros virescens