2.2. Experimental procedure The treatments comprised A. hybridus + sorghum that received no stripping, A. hybridus + sorghum whose two bottom leaves were stripped and A. hybridus + sorghum whose four bottom leaves were stripped. Controls included A. hybridus that had no sorghum, and A. hybridus that was sprayed with atrazine. Leaf stripping was conducted 12 days after sorghum emergence. Leaf stripping was accomplished by cutting the required number of leaves ot the junction between the leaf sheath and the stem (Mashingaidze et al,, 2012) using a scalpel blade. Treatments were replicated 6 times.