. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. The Bulletin. 23 ROOT KNOT OF VARIOUS CROPS. Distribution in North Carolina.—This trouble occurs in sandy types of soil in the eastern half of the State. Field Crops Affected.—Alfafa, vetch, soy bean, clovers, cowpeas (ex- cept Iron), cotton, tobacco, potato, sweet potato, watermelon, cucumber, cantaloupe, and tomato. Many other crop plants are affected as well. A few of the common weeds that are susceptible are May-pop, wild potato, pigweed, purslane, morning glory, and wild Fig. 11. Nemato
. The Bulletin of the North Carolina Department of Agriculture. Agriculture -- North Carolina. The Bulletin. 23 ROOT KNOT OF VARIOUS CROPS. Distribution in North Carolina.—This trouble occurs in sandy types of soil in the eastern half of the State. Field Crops Affected.—Alfafa, vetch, soy bean, clovers, cowpeas (ex- cept Iron), cotton, tobacco, potato, sweet potato, watermelon, cucumber, cantaloupe, and tomato. Many other crop plants are affected as well. A few of the common weeds that are susceptible are May-pop, wild potato, pigweed, purslane, morning glory, and wild Fig. 11. Nematode Root-knot. A badly affected root-system, showing the irregular swellings of various sizes. Symptoms.—Enlargements of irregular shape and size appear any- where on the root system. These swellings involve the whole thickness of the root, and are not merely outgrowths from the side as are the bacterial nodules of leguminous crops. Affected plants are stunted in growth and their foliage is a lighter shade of green than normal; this, however, may be hard to detect when a large area is uniformly infected. Badly affected plants may wilt when water is scant, or sometimes in the hot sun when there is an abundance of moisture in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Carolina. Dept. of Agriculture. Raleigh : State Board of Agriculture
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