Weed control in sweet corn and field corn in 2007 | การควบคุมวัชพืชในข้าวโพดหวานและข้าวโพดเลี้ยงสัตว์ ปี 2550
2009
Sodsai Changsaluk(Kasetsart University, Bangkok (Thailand). Inseechandrastitya Institute for Crops Research and Development. National Corn and Sorghum Research Center) E-mail:ijsssc@ku.ac.th | Tosapon Pornprom(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Department of Agronomy) | Naroon Waramitr(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Department of Agronomy) | Rungsit Suwanmonkha(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Somchai Lim-aroon(Kasetsart University, Bangkok (Thailand). Inseechandrastitya Institute for Crops Research and Development. National Corn and Sorghum Research Center)
Two experiments of weed control in sweet corn and field corn were carried out at the National Corn and Sorghum Research Center, during April-July 2007. The experiments were conducted to determine efficiency of herbicides and theirs effect on corn yield and yield components. Both experiments laid out in RCBD with 3 replications of 10 treatments. The first experiment, pre-emergence herbicidesatrazine, alachlor, pendimethalin, isoxaflutole, dimethenamid, atrazine+ alachlor, atrazine+pendimethalin and isoxaflutole+pendimethalin were applied to sweet and field corn. The second experiment, post-emergence herbicidesparaquat, 2,4-D (DMA-6), 2,4-D (red elephant), 2,4-D+paraquat, glufosinate, fluroxypyr, glyphosate and halosulfuron were applied to sweet corn and field corn compared to hand weeding and non-weeding. The results revealed that the major weed species were purple nutsedge (Cyperus rotundus), paint spurge (Euphorbia heterophylla), dayflower (Commelina benghalensis), itchgrass (Rottboelia cochinchinensis), and goosegrass (Eleusine indica). The application of pendimethalin, atrazine+pendimethalin and isoxaflutole+pendimethalin as pre-emergence herbicide had lowest number of itchgrass. Dimethenamid gave good overall weed control visually both in sweet corn and field corn 88 and 92 percent, respectively. The application of 2,4-D (DMA-6), 2,4-D (red elephant), 2,4-D (DMA-6)+paraquat, glufosinate, fluroxypyr, glyphosate, and halosulfuron as post-emergence herbicide showed good to very good weed control better than atrazine+pendimethalin as pre-emergence 75 percent. All treatment herbicides did not affected on yield and yield components of sweet corn and field corn.
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