What are These Hidden Pests Costing Growers?

Nematodes are non-segmented worms that can feed on plant tissue, including cotton roots. Nematodes that attack cotton roots are microscopic and can number in the thousands in one pint of soil. These versatile plant parasites can either move through, or be stationary in, the soil and they can either live inside or outside of roots. In the United States, there are four major species found in cotton – root-knot, reniform, lance and sting nematodes.

Nematodes can cause significant yield loss. Over a 50-year period, the National Cotton Council of America (NCC) reports that the average yield loss from nematodes was 2.13 percent, peaking at 4.39 percent in 2000.

Where are Nematodes Found?
Nematodes have been found in every cotton-growing state. They are most prevalent in warmer regions. Click on the NCC maps below that highlight infestation levels for each species of nematode.

Root-knot Nematodes 

Reniform Nematodes 

Lance Nematodes