The document describes the disease cycle of coffee rust, caused by the fungus Hemileia vastatrix. It begins with a microscopic spore infecting coffee plant leaves through natural openings, invading and killing cells to produce more spores. These new spores are then released and dispersed by rain, wind, animals, and people to infect other plants, completing the cycle in 4 to 7 weeks. A single initial spore can generate tens of thousands of additional spores through 4 to 6 generations of replication and infection.

1. INDIRA GANDHI KRISHI
VISHWAVIDYALAYA, RAIPUR, C.G.
BTC COLLEGE OF AGRICULTURE & RESEARCH STATION, BILASPUR
An assignment based on :
Disease Cycle of coffee rust
Course title: disease of field & horticultural crops & their management -i
Course code: app 5311
Credit hours: 3(2+1)
Session: 2023-24
Submitted to: submitted by:
Dr. vinod nirmalkar Ishan dewangan
Deptt. Of plant pathology college id:20212334
B.sc ag. (honors)

2. DISEASE CYCLE OF COFFEE RUST
(Causal Organism: Hemileia vastatrix

3. DISEASE CYCLE

4. DISEASE CYCLE
The disease cycle begins with the infection by a
microscopic spore. This spore enters the plant via a natural
opening on the underside of the leaf. After entering, the
spore invades other cells to obtain nutrients. This eventually
kills the cells while producing new spores.
These new spores are forced out through the leaf openings.
Here, they are dislodged primarily by rain but also by wind,
animals and people. This begins the infection anew. This
process takes about 4 to 7 weeks.
A single spore can produce four to six generations. The
initial single infection generates an exponential increase of
tens of thousands of spores.

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