Weed evolution and community structure - Ecological Management of Agricultural Weeds - page 476

Table 10.7. Percentage mortality from selected ecological weed management practices and adaptations that may be selected for by the practices

Practice Mortality (%) Species Reference May select for

Rotary hoeing 53-90 Chenopodium album Buhler,Gunsolus & Ralston (1992) Ability to emerge from greater depth

Amaranthus spp.
Setaria faberi

Late planting ofspring 43 Setaria faberi Forcella,Eradat-Oskoui & Wagner Delayed germination; higher temperature

crops (delay of 1 month) 63-85 Chenopodium album (1993) for induction ofsecondary dormancy

Amaranthus retroflexus Gunsolus (1990)

Setaria faberi

Collection ofweed seeds 91-99 Datura ferox Ballaré et al .(1987) Early maturation

during grain harvest