|Ring nematodes (Criconemella
xenoplax) are migratory ectoparasites related to pin
nematodes, but they are slightly longer and wider. The life cycle takes 25-35 days.
After feeding for several days on roots, females deposit single eggs every two to four
days. Optimum conditions for reproduction include a pH near 7 and soil temperatures
between 75 and 80 F. Ring nematodes appear to be sensitive to low soil moisture and low
||Although ring nematodes are found on a
wide diversity of crops, few studies have been initiated to determine the potential for
yield loss. Ring nematodes often occur in high numbers in peppermint, but no studies have
been conducted to determine what damage they cause to mint.