Herbicide-Crop Rotation for Johnsongrass ( Sorghum halepense ) Control
1979; Cambridge University Press; Volume: 27; Issue: 5 Linguagem: Inglês
10.1017/s0043174500044441
ISSN1550-2759
AutoresJ. E. Dale, James M. Chandler,
Tópico(s)Nematode management and characterization studies
ResumoThe feasibility of herbicide and crop rotation for the control of johnsongrass [ Sorghum halepense (L.) Pers.] in corn ( Zea mays L.) was studied in field experiments. Light infestations of johnsongrass were initially present, but it became the predominant weed after 4 yr of continuous corn treated with atrazine [2-chloro-4-(ethylamino)-6-(isopropylamine)- s -triazine], cyanazine {2-[[4-chloro-6-(ethylamino)- s -triazin-2-yl]amino]-2-methylpropionitrile}, and linuron [3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea], alone and in combinations at rates of 2.24, 2.24, and 0.84 kg/ha, respectively. The infestation of johnsongrass was effectively controlled by growing corn in rotation with cotton ( Gossypium hirsutum L.) in a cropping sequence of corn-cotton-cotton-corn, in which trifluralin (α,α,α-trifluoro-2,6-dinitro- N,N -dipropyl- p -toluidine), fluometuron [1,1-dimethyl-3-(α,α,α-trifluoro- m -tolyl)urea] and MSMA (monosodium methanearsonate) at 0.56, 2.24, and 2.24 kg/ha respectively, were used for weed control in cotton. In the corn-cotton-cotton-corn cropping sequence, the herbicide treatments also prevented increases in the populations of other indigeneous weeds including prickly sida ( Sida spinosa L.), prostrate spurge ( Euphorbia supina Raf.), spotted spurge ( Euphorbia maculata L.), common purslane ( Portulaca oleracea L.), tall morningglory [ Ipomoea purpurea (L.) Roth], common cocklebur ( Xanthium pensylvanicum Wallr.), spurred anoda [Anoda cristata (L.) Schlecht.], hemp sesbania [ Sesbania exaltata (Raf.) Cory], redroot pigweed ( Amaranthus retroflexus L.), goosegrass [ Eleusine indica (L.) Gaertn.], junglerice [ Echinochloa colonum (L.) Link], large crabgrass [ Digitaria sanguinalis (L.) Scop.], and purple nutsedge ( Cyperus rotundus L.).
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