Chemical weed control in the Ord River Valley. 1. The oilseed crops : safflower and linseed

Abstract

A range of herbicides was tested on the oilseed crops linseed and safflower at Kiberley Research Station on the Ord River in north-west Australia. Diuron and TCA were the most effective. Diuron at 0.75 and 1 Ib an acre active ingredient, applied pre-emergence, controlled the grasses Chloris spp. and Echinochloa colonum (L.) Link and pigweed, Portulaca oleracea L. without affecting linseed and safflower. TCA at 4 to 8 lb an acre active ingredient, applied pre-emergence, and at 4 lb an acre active ingredient, applied early post-emergence, controlled the above grasses without affecting safflower. On linseed, TCA can be applied at 4 to 8 lb an acre active ingredient as a pre-emergence or early post-emergence spray, but early post-emergence application reduces percentage oil content and iodine value of the seed.