In a greenhouse experiment, cabbage growing in soil heavily infested with Heterodera schachtii was treated with 6.72 kg/ha of fenamiphos. Growth of cabbage was over tenfold greater than growth in nontreated pots and was essentially the same as growth in the noninfested check pots. However, the nematode population returned to extremely high levels after 60 days on the nematicide treated cabbage. When the non-host crop cucumber was planted in heavily infested pots, plant growth was reduced 63%. Larval penetration of the roots occurred and injury symptoms were prevalent although there was no further development of the nematode. After 60 days growth of the cucumbers, larval populations were reduced 86%. Larval populations were extremely low after treating with 6.72 kg/ha of fenamiphos followed by 60 days growth of cucumber.
