Powered by Blogger.

Friday, January 17, 2014

Rust of grass- and crop plants

No comments :

Rust is plant disease commonly affecting both lawn plants and crop plants. It is caused by Puccinia sp. It affects many different species of turf grasses in different parts of the world. Large scale damage to crops of family graminae and grases in the wild is usually caused in summer months.



Images 1 and 2 spots on leaf blades of Cynodon dactylon

On crops, Puccinia causes great damages to wheat crop with initial brown spots on leaves and stems. It initially causes light yellow flecks on the grass blades and sheaths. The flecks enlarge and elongate over time, turning yellow in color. These areas then rupture, releasing spores that are yellowish-orange to reddish-brown in color and hence it is called as rust. A severe rust disease infection can cause the entire plant shoot to turn yellowish to reddish-brown in color and slow growth of the plant, either grass or crop. 

Infection of the pathogen Puccinia occurs in moist climates with temperatures ranging from 65-86 degrees Fahrenheit and low nitrogen soils. Following cultural control tips can be recommended -

(i). Use fertilizers with adequate levels of nitrogen
(ii).Reduce thatch with core aeration
(iii). Reduce shade and improve air circulation
(iv). Avoid watering at night
(v). The use of rust resistant plants
(vi).Crop rotation can break the disease cycle because many rusts are host specific. Water deeply and infrequently to increase growth

Key Words : rust, puccinia, grass, wheat, crop

No comments :

Post a Comment

Note: Only a member of this blog may post a comment.