Sugar beet cyst nematode
Damage to Sugar beets. Heterodera
schachtii is a major parasite of sugar beets, causing serious stand
and yield reductions.
Biology. Like other cyst nematodes, H. schachtii
as eggs and juveniles, remaining dormant inside the cyst which is
the body of the dead female. After emerging, juveniles infect the root
near the root tips, establishing a feeding site where they continue to
Ecology. H. schachtii is present
in nearly half the states in the United States and in 39 other sugar beet-growing
Symptoms. H. schachtii causes stunting
and yellowing of plants, misshapen and excess fiberous roots.
Damage to other crops. Although H. schachtii
has a number of other host crops, it presently is known to cause economic
losses only in sugar beets.
Control. Nematicides have been found to be effective,
as well as rotation of crops and trap-crops.
Nematodes (UC Pest Management Guidelines