Zobrazeno 1 - 10
of 102
pro vyhledávání: '"W. B. Duke"'
Publikováno v:
Weed Science. 23:67-70
Early postemergence application of atrazine [2-chloro-4- (ethylamino)-6-(isopropylamino)-s-triazine] at 0.28 kg/ha in combination with alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide] at 0.42 kg/ha plus a non-toxic oil-surfactant bl
Publikováno v:
Weed Research. 24:281-290
Summary: Early growth and nutrient content of crops and weeds from weed-free and weedy no-tillage maize (Zea mays L, cv. TZB), cowpea (Vigna unguiculata (L) Walp. cv. VITA-5) and maize/cowpea intercrop at populations of 40000, 50000 and 30000 + 40000
Publikováno v:
Weed Science. 23:20-25
Several methods of evaluating plant responses to combinations of herbicides are discussed. They include: a direct-plot of percent response vs toxic units; determining ID50(dosage that causes a 50% reduction in growth of the treated plant) for each he
Autor:
Albert O. Ayeni, W. B. Duke
Publikováno v:
Agriculture, Ecosystems & Environment. 13:309-317
Studies conducted with the rhizomes of speargrass (Imperata cylindrica (L.) Beauv.) in a growth-chamber environment using a peat—vermiculite medium showed that the stage of rhizome growth and its weight were the main features determining the regene
Publikováno v:
Weed Science. 23:142-147
Studies were conducted to examine over time the effects of propachlor (2-chloro-N-isopropylacetanilide) on the growth of cucumber (Cucumus sativusL. ‘Straight Eight’) roots and associated biosynthetic reactions. Complete inhibition of root elonga
Autor:
P. K. Fay, W. B. Duke
Publikováno v:
Weed Science. 25:224-228
Three thousand accessions of the U.S. Dep. Agric. World Collection ofAvenasp. germ plasm were screened for their ability to exude scopoletin (6-methoxy-7-hydroxy coumarin), a naturally occurring compound shown to have root growth inhibiting propertie
Publikováno v:
Weed Research. 24:439-448
Summary The influence of no-tillage and conventional tillage on the outcome of early weed interference in maize (Zea mays L., cv. TZB), cowpea [Vigna unguiculata (L.) Walp, cv. VITA-5] and their intercrop at populations of 40000, 50 000 and 30 000 +
Publikováno v:
Weed Science. 23:43-48
The effect of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] and alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide] combinations on various physiological processes was studied in order to establish a basis for the sy
Publikováno v:
Weed Science. 23:533-535
The construction and operation of an apparatus for applying rainfall to soil columns being used for pesticide leaching studies is described. The apparatus will uniformly deliver water to many soil columns over a wide range of natural rainfall rates.
Autor:
W. B. Duke, J. F. Hunt
Publikováno v:
Weed Science. 23:314-316
Studies were conducted to compare weed growth under lighting systems composed of metal halide (MH) lamps and fluorescent-incandescent (FI) lamps. The MH lamps provided more light intensity and over a 6-week period caused plant dry weight to be 60 to