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Influence of Soil Incorporation on Herbicide Performance in Sorghum 1
Author(s) -
Wicks G. A.,
Burnside O. C.,
Fenster C. R.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200020022x
Subject(s) - atrazine , sorghum , agronomy , weed control , sorghum bicolor , sweet sorghum , mathematics , biology , environmental science , chemistry , pesticide
Experiments were conducted at Lincoln, North Platte, and Alliance, Nebraska, during 1965 and 1966 to determine the effect of herbicides, herbicide incorporation, and rotary hoeing on ‘Nebraska 505’ sorghum [ Sorghum bicolor (L.) Moench.] grown in 50.8‐cm rows. Preplant soil incorporation and preemergence herbicide applications were superior to preemergence + shallow incorporation with a rotary hoe in weed control and grain yields. Postemergence rotary hoeing improved weed control and sorghum yields on herbicide treatments. The best treatments were atrazine (2‐chloro‐4‐ethylamlno‐6‐isopropylamino‐s‐triazine) at 2.24 kg/ha and atrazine norea [3‐(hexahydro‐4,7‐methanoindan‐5‐)y‐ll, l‐dimethylarea] at 0.84 + 1.68 kg/ha (1.12 + 2.24 kg/ha in 1965) + two rotary hoeings at Lincoln, atrazine at 2.24 kg/ha at North Platte, and rotary hoeings but no herbicide at Alliance. Only at Lincoln did sorghum yields on herbicide‐treated plots approach that on handweeded checks. On the low organic matter soils at North Platte and Alliance, atrazine injury limited sorghum yields.