Biofumigation for plant disease control – from the fundamentals to the farming system - Disease Control in Crops - page 188

Table 9.1 A summary of reported pest and disease suppression in potato cropping systems by various Brassicaceous amendments. The levels of suppression are
calculated as the change in the level of plant infection/damage or soil populations compared with either a non- Brassica control where possible, or untreated fallow.

Pest/Disease Country Brassica Suppression (%) Comments Reference

Nematode
Meloidogyne chitwoodi USA B. napus 78 Chemical augmenting required Mojtahedi (1993)

Weeds
Various USA B. napus 50-96 Chemical augmenting required Boydston & Hang (1995)

Fungi
Verticillium dahliae USA B. napus 0-50 Wilt compared with pea control Davis et al . (1996)

V. dahliae Australia B. juncea 42 Inoculum levels in soil compared to oat control. Harding & Wicks (2001)

B. napus 23

Only valuable if inoculum close to disease
threshold

R. sativus 26

Rye +66

Spongospora subterranea USA

(2 sites)

B. napus (rape) 19 and 0 Activity higher in high-GSL material such as rape

and mustard, although some activity of rye

Larkin & Griffi n (2007)

B. napus (canola) 0 and na

B. juncea 40 and 0

S. alba 0 and 0

Rye (Lemtal) 27 and 0