Co-Authors:
Horowitz, M., Div. Weed Res., Agric. Res. Organ., Newe Ya'ar Exp. Stat., Haifa, Israel
Abstract:
In order to test herbicides for the destruction of illicit stands of cannabis (Cannabis sativa L.) a series of commercially available herbicides were sprayed on glasshouse grown plants having 2 to 6 leaves. The following herbicides caused complete kill or severe injury to cannabis plants: herbicides with root and foliage activity (ametryn, atrazine, metribuzin, prometryn, terbutryne, diuron, fluometuron, linuron, methabenzthiazuron, phenobenzuron, ethofumesate, karbutilate, methazole and oxadiazon); and foliar acting herbicides with brief or no soil persistence (amitrole, bentazon, 2,4 D, diquat + paraquat, glyphosate and phenmedipham. In field experiments herbicides of the latter group, and ioxynil, metribuzin, and a MSMA cacodylate mixture, caused death or severe damage to young cannabis plants. Glyphosate, ioxynil and bentazon destroyed developed cannabis plants. In glasshouse and field experiments the following herbicides applied to young cannabis plants caused marked deformations of stems, leaves and/or inflorescences: barban, butralin, dalapon, difenzoquat, dinitramine, diphenamid, IPC, napropamide, penoxalin, trifluralin, and U 27267.
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