Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Tolerance of clary sage, coriander and caraway to herbicides applied pre- and post-emergence.

Abstract

In field trials on silt loam at Invermay in 1989-90, clary sage (Salvia sclarea), coriander (Coriandrum sativum) and caraway (Carum carvi) were evaluated for their tolerance to herbicide programmes containing various combinations of pre- and post-em. linuron (0.5-1.5 kg/ha), prometryn (0.5-1.5 kg), chlorbromuron (0.5-1.5 kg), diquat (0.6 kg), paraquat (0.6 kg), simazine (1-1.5 kg), diuron (1-1.5 kg), terbuthylazine (1-1.5 kg), oxadiazon (1.6 kg), oxyfluorfen (0.72 kg), atrazine (1 kg), metribuzin(0.3 kg) and chloroxuron (2 kg). Linuron, chlorbromuron and prometryn applied pre-em. had little effect on plant numbers of all crops. Coriander and caraway showed good tolerance to post-em. applications of linuron, chlorbromuron and prometryn, but these treatments caused moderate to severe leaf scorch on sage and a number of smaller plants were killed. Combinations of diquat with simazine, diuron or terbuthylazine applied 7 months after sowing of sage were more damaging to the plants than paraquat mixed with the same herbicides. Weeds were well controlled by all herbicides at all spraying dates, with the exception of pre-em. prometryn and post-em. metribuzin, both of which failed to control germinating broadleaved dock (Rumex obtusifolius). Linuron and chlorbromuron resulted in the best control of docks and a wide range of annual weeds (including Capsella bursa-pastoris, Chenopodium album, Polygonum aviculare, P. convolvulus [Fallopia convolvulus] and Spergula arvensis).