Expression of Resistance in Peanuts to Pratylenchus brachyurus: Impact on Screening for Resistance.

nematicide, D-D(1,2-dichloropropane1,3dichloropropene), resulted in the greatest flowering with the controls giving the lowest (Table 2). The less effective nematicide, ethoprop (O-ethyl S,S-dipropyl phosphorodithioate), had an intermediate effect on flowering. In these tests, flowering was positively correlated with yield and negatively related to soil nematode populations and root-gall indices (Table 3). Infection by Meloidogyne species can have an important impact on the phenology of flue-cured tobacco. Flowering is delayed under moderate infection levels or completely suppressed by high nematode infection. The tobacco cyst nematode, Globodera solanacearum, also delays flowering of flue-cured tobacco in Virginia (John Riley and Dean Komm, pers. comm.). LITERATURE CITED