Influence of major edaphic factors on Hemicriconemoides mangiferae infesting Mangifera indica L.
Anita, Chaubey A. K.
Author Affiliation: Department of Zoology, Ch. Charan Singh University, Meerut - 250 004, India.
Journal of Experimental Zoology, India 7 : 285-293
Abstract : A 24-month study conducted in 2000/01 and 2001/02 in Meerut, Uttar Pradesh, India revealed the influence of major edaphic factors (temperature, moisture and pH) on the dominant plant parasitic nematode, Hemicriconemoides mangiferae infesting Mangifera indica. Temperature was more detrimental to phytonematodes compared to the other factors. The functional linear regression trend with temperature showed negative correlations at all depths and distances with few exceptions at 20.0-40.0 cm vertical depth (P=0.335) and at 30 cm horizontal distance and at 40.0-60.0 cm depth (P=0.484) and at 60 cm distance during 2001-02. The functional linear regression trends revealed strong positive correlations at almost all the depths and all horizontal distances with moisture only exception during 2001-02 (at 40.0-60.0 cm depth, 90 cm distance, P=0.737). Moisture also showed an increase in reproductive index. The data also revealed positive correlation with pH at all the depths and distances with exceptions at 0.0-20.0 cm (P=0.840), 20.0-40.0 cm (P=0.681) depths at 60 cm distance and at 90 cm distance and at 0.0-20.0 cm (P=0.388), at 20.0-40.0 cm (P=0.417) depths during 2000-2001. The exceptions were also observed in the consecutive year (at 30 cm distance & 0.0-20.0 cm depth, P=0.607 and at 90 cm, 40.0-60.0 cm depth, P=0.745).