Invasion, development, growth and egg laying by Meloidogyne javanica in Brassicaceae crops

Invasion. development and egg laying by Meloidogyne javanica in I I Brassic aceae and four non-Brassicaccae crop species/subspecies was investigated. A L 10 to 15 and 15 to 20 degreesC, fodder rape cv. Rangi was invaded less th an the good hosts tomato cv. Grosse Lisse and field pea cv. Dun but more th an the poor host oat cv. Cooba. With an inoculum of 50 second stage juvenil es (J2), invasion of Rangi. and the intermediate host subterranean clover e v. Trikkala, were similarly invaded when inoculated with 50 and 100 J2, cv. Rangi was invaded less than tomato, The intermediate host subterranean clo ver cv. Trikkala and Rangi were similarly invaded when inoculated with 50 a nd 100 J2 but cv. Trikkala was less invaded with 200 J2. Oat cv. Cooba was always less invaded than the other hosts. Invasion of 3-week-old seedlings of cv. Rangi and 12 cultivars of seven other Brassicaceae crop species/subs pecies were similar. Three weeks after inoculation, more M. javanica had de veloped to the mature female stage in tomato than in the eight Brassicaceae species/subspecies. Females growing in tomato and field pea were always la rger than those in rape cv. Rangi. Females in Rangi were larger but those i n oilseed radish cv. Adagio were smaller than in I I other cultivars of sev en Brassicaceae. except in plants grown in winter. Egg masses from four Bra ssicaceae species contained fewer eggs than egg masses from tomato at 6 wee ks after inoculation. but at 7 and 8 weeks only those from fodder rape cv. Korina had consistently fewer than tomato. Results are discussed in relatio n to lost status, glucosinolates and potential use of Brassicaceae for cont rol of Meloidogyne.