1Department of Plant Pathology, Andhra Pradesh Agricultural University, Agricultural College, Bapatla-552 101.
2A.P. Agricutural University, Agricultural Research Station, Chinthalapudi, Ponnur-522 124.
3Indian Tobacco Company Ltd., Guntur.
4A.P. Agricultural University, Agricultural Research Station, Amaravathi Guntur.
The intensity of mycorrhizal root colonization and recovery of mycorrhizal spores from the four important cotton growing regions was maximum at 180 days of sowing cotton. Mycorrhizal root colonization was correlated negatively with electrical conductivity at 180 days of cotton growth and found to be significant (r= -0.9578). Mycorrhizal root colonization was also negatively correlated with soil phosphorus content at 120 days of growth. Rhizosphere microbial population (total fungi, bacteria and actinomycetes) and different groups of nematodes(saprozoic, mycophagous, predatory and plant parasitic) recovered could not be correlated with the mycorrhizal colonization of roots.
Cotton, endomycorrhizal fungi, root colonization, rhizosphere microflora, nematodes, mycorrhizal spores
