Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Weed control in various food crops in Mauritius with particular reference to mixed cropping.

Abstract

Details of the properties and spectra of activity of the 12 most commonly used herbicides in Mauritius are given. 1 kg Sencor [metribuzin], 2-3 kg linuron or 3 kg Topogarde [terbuthylazine + terbutryn]/ha are recommended for pre-em. use in potatoes planted alone or in sugarcane inter-rows. Atrazine, Primagram [atrazine + metolachlor] and 2,4-D amine cause severe phytotoxicity to potatoes. In maize, where weeds are particularly competitive during the first 6 weeks, atrazine and Primagram are recommended for general weed control. Cyperus rotundus competing with maize can be controlled by 2-3 kg Basagran-DP [bentazone + dichlorprop]/ha directed beneath the crop canopy by a flood-jet nozzle at a crop height of ≥15 cm, or by 2,4-D amine when the crop is ≥30 cm high. In groundnuts effective pre-em. treatments include 1 kg Ronstar [oxadiazon], 2 kg linuron or 2 kg Preforan [fluorodifen]/ha. C. rotundus, C. esculentus and Cynodon dactylon are best controlled in the absence of a crop by glyphosate or Velpar [hexazinone]. Tordon (picloram) is recommended against Heliotropium amplexicaule, Artemisia vulgaris and Ambrosia psilostachya.