International Journal of Current Microbiology and Applied Sciences

ISSN: 2319-7706 Volume 2 Number 8 (2013) pp. 311-314

Studies on the pathogenic potential and life cycle of Rotylenchulus reniformis on Coleus blumei

Aasia Rashid1* and Tabreiz Ahmed Khan2

1Department of Botany, Government P.G. College, Rajouri-185131 (J&K), India 2Department of Botany, Aligarh Muslim University- 202002 (U.P) , India *Corresponding author e-mail: aasiabhat@gmail.com

A B S T R A C T

The significant reduction in the plant growth was observed at or above inoculum level of 2000 immature females of R. reniformis/kg soil. Hence, this inoculum level was considered as the minimum damaging threshold level for coleus. The population of reniform nematode increased with the increasing levels of inoculum. The maximum nematode population was recorded at the highest inoculum level and the minimum population at the lowest inoculum level. The reproduction factor was significantly reduced with the increase in inoculum levels. Symptoms like chlorosis, stunted growth and sparsely developed roots were found during the experimental studies. Rotylenchulus reniformis required 27 days to complete the life cycle on Coleus blumei.

Keywords

Reniform nematode; Pathogenicity; Life Cycle; Coleus; Ornamental plants.