|Stubby-root nematodes (Paratrichodorus
spp.) are migratory ecoparasites, which occur in mint
occasionally, but their impact on mint production is unknown. Stubby-root nematodes
generally do best in sandy soils and are capable of considerable vertical migration
between the surface and depths greater than three feet. The life cycle is completed in as
short as 2 1/2 weeks at 30 C, but at cooler temperatures may take as long as six weeks.
||Feeding by stubby-root nematodes causes
the root tip to stop growing, stunting root growth. Lateral roots often emerge from
behind the root tips, which are also fed upon. These become stunted and produce lateral
roots on their own. Swelling of roots is also common, producing a prolific system of many
short, branched, "stubby" appearing roots, which do not explore sufficient soil
volume to take up adequate water and nutrients for the plant. Thus, plant tops show water
and nutrient stress.