IPMP3.0, Oregon State University, Copyright 2000





Registered Nematicides



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Mint Nematode Body Mint Nematode Head
Mint Nematode Body Mint Nematode Head
Mint nematodes (Longidorus elongatus) are also referred to as needle nematodes because of their long, slender stylet. Mint nematodes are the largest plant-pathogenic nematodes found on any plant (5 mm=0.2 inch). Mint nematodes are migratory ectoparasites. Mint nematode reproduces at soil temperatues as low as 50 F and perhaps lower. Most rapid populaiton growth occurs at soil temperatures of 75-85 F, but, as temperature increases above 85 F, reproduction declines. Mint nematodes feed exclusively on root tips, which are transformed into terminal galls in many plants. Damage to peppermint may range from slight stunting to large barren areas.  Symptoms are most evident during late spring and early summer before mint has a chance to cover. Individual plants are generally shorter and usually exhibit the reddish appearance often attributable to stress factors that retard mint growth. Roots are often malformed or stubby, and feeder roots may be absent. Plants become unthrifty and die from an inability to take up sufficent water and nutrients. Damage causes stands to thin over time, and there is reduced growth after harvest. Damaged areas often typically occur in localized areas or patches
General Description General Description of Damage Symptoms