15. 8.Importance of poaceae
1. Use as food.
Members of this family are good source of food, wheat,
maize, rice, sugarcane etc
Use as food of animals, e.g fodder for cattle and sheeps etc.
Oils are obtained.
16. Cont.
2.Industrial uses.
Manufacturing of paper
Sugar is obtanied
Biofuel production
Making of woodwind
Istruments.
3.Medicinal uses.
Cymbopogon jwarancusa
Is used to cure fever and flu.
18. 9.Red rot of sugarcane.
Oldest known diseas.
1. Causal agent.
Red rot disease is caused by the fungus Glomerella
tucumanensis. An older name, Colletotrichum falcatum,
is still preferred by some pathologis
19. Cont.
2. Symptoms.
Diagnostic symptoms can best be observed by
splitting the stalk lengthwise. The infected tissues
have a dull red color interrupted by occasional
whitish patches across the stalk (Figure 2). These
white patches are specific to the disease and are of
significance in distinguishing red rot from other stalk
rots. Reddened vascular bundles may also pass
through to healthy tissues.
20. Cont.
. In susceptible varieties, the red color may be seen
throughout the length of the stalk, and sometimes
also with some gray color. The infection is largely
confined to the internodes in resistant varieties. Red
rot infected sugarcane may be distinguished from
pineapple disease, another sugarcane disease
causing internal stalk reddening by its rather sour
odor. By contrast, sugarcane infected with pineapple
disease emits a sweet scent, smelling like ripened
pineapples
21. Cont.
3. Prevention and control.
The use of resistant sugarcane varieties is the most
effective method of prevention and control.
The incidence of red rot can be reduced through
good cultural practices, such as clearing fields of
excessive trash and efficient drainage. Agronomic
practices that hasten germination are important in
reducing seed rotting and obtaining good stands
