Yield of maize as influenced by population densities of the root lesion nematode,Pratylenchus zeae

Under field conditions, population density of the root lesion nematode, Pratylenchus zeae in soil and roots of maize cv. Single Hybrid 10 fluctuated throughout its growing season and reached the peak in September, harvest stage of maize. There were negative correlations (r) between the population densities of P. zeae in maize roots and grain yield of maize according to the data collected at all growing seasons.