Plant Pathology Department, Nematology Laboratory, National Research Center, Cairo, Egypt
*Agricultural Zoology & Nematology Laboratory, Faculty of Agriculture, Cairo University, Egypt
†Corresponding author emails: iismail2002@yahoo.co.uk, President@nrc.sci.eg
ABSTRACT
Four ages of corn Zea mays L., cultivar Giza 2 were used to evaluate its influence on infectivity, development and
virulence of Heterodera zeae. The results revealed that the nematode final population and rate of build-up
correlated negatively with the host age. The nematode multiplied highly on the youngest seedlings; and was more
virulent on the youngest than on the oldest plants.
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