Articles by Keyword: Herbicide Bioactivity

Search results for Herbicide Bioactivity

We found 28 results for you
  1. Importance of selected soil properties on the bioactivity of alachlor and metolachlor

    Importance of selected soil properties on the bioactivity of alachlor and metolachlor

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Bioassays with grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 were conducted in a glasshouse. Thirty-four natural soils were used in each of two experiments with alachlor [2-chloro-2′,6′-diethyl-N- (methoxymethyl) acetanilide] and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-otoluidide] respectively. Linear regression analyses were performed to...
  2. Importance of selected soil properties on the bioactivity of acetochlor and metazachlor

    Importance of selected soil properties on the bioactivity of acetochlor and metazachlor

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The bioactivity of acetochlor (2-chloro-N-(ethoxymethyl)-6′-ethyl-o-acetotoluidide) and metazachlor (2- chloro-N-(1-pyrazolylmethyl)-aceto-2′,6′-xylidide) was evaluated in thirty-two soils under controlled conditions. Grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 was used as the indicator plant in the bioassays. Bioactivity was correlated with organic matter...
  3. The Impact of Weeds and Two Legume Crops on <em>Eucalyptus</em> Hybrid Clone Establishment

    Item type: Journal Article • Journal: South African Forestry Journal
    The relative competition imposed on Eucalyptus hybrid clone GC304 grown from establishment with either complete weed cover, intra-row weeds, inter-row weeds or legume cover crops of Mucuna pruriens and Vigna sinensis is under study in a field experiment on a...
  4. The effect of seeding rate and weed control on the establishment of Rhodes grass in the Eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The effect of four seeding rates (3; 6; 12 and 24 kg/ha), four methods of weed control (nil, mowing, 4 l/ha of 2,4‐D amine and hand weeding) and two times of cutting (late boot stage and end of season) on...
  5. Die rol van sekere omgewingsfaktore by alachloraktiwiteit

    Die rol van sekere omgewingsfaktore by alachloraktiwiteit

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Biotoetse met graansorghum (Sorghum bicolor L.) is in potte in glashuise en groeikabinette uitgevoer. Geselekteerde grond- eienskappe is gekorreleer met alachloraktiwiteit. Organiese materiaalinhoud (% C) was die beste gekorreleerd met die aktiwiteit van alachlor en pH die swakste. Die r-waardes...
  6. Screening of candidate herbicides in field trials for chemical control of <em>Chromolaena odorata</em>

    Screening of candidate herbicides in field trials for chemical control of <em>Chromolaena odorata</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A range of concentrations of a number of herbicides was tested in field trials, for the control of Chromolaena odorata (L.) R.M. King and H. Robinson. The results obtained show that triclopyr, 2,4,5-T and tebuthiuron were consistently the most effective,...
  7. Die invloed van verskillende tipes en hoeveelhede plantresmateriaal op onkruiddodereffektiwiteit

    Die invloed van verskillende tipes en hoeveelhede plantresmateriaal op onkruiddodereffektiwiteit

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die invloed van agt verskillende plantreshoeveelhede (0–3 500 kg ha−1), sowel as verskiHende tipes plantreste (graansorghum- en mieliereste) op onkruiddodereffektiwiteit is ondersoek in 'n glashuisproef. Onkruiddodereffektiwiteit is bepaal deur middel van 'n indikatorplant, Avena sativa. Droëmassaopbrengs en planttellings van die...
  8. Role of temperature in the activity of acetanilide herbicides on three <em>Phaseolus</em> taxa

    Role of temperature in the activity of acetanilide herbicides on three <em>Phaseolus</em> taxa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Alachlor [2-chloro-N-(2,6 diethylphenyl)-N-(methoxymethyl) acetamide], metolachlor [2-chloro-N-(2-ethyl-6- methylphenyl)-N-(2-methoxy-1 -methylethyl) acetamide] and acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6- methyl-phenyl) acetamide], members of the chloroacetanilide herbicides, are used pre-emergence to control grasses and some broadleaf weeds. Two concentrations, i.e. 0,5 and 2 mg ai kg−1 of the...
  9. The effect of simulated rain on the efficiency of herbicides in the presence of maize stubble

    The effect of simulated rain on the efficiency of herbicides in the presence of maize stubble

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of the amount of simulated rain and stubble on the efficiency of herbicides was examined in a glasshouse study. Four different amounts of maize stubble (0–3 500 kg ha-1) and nine different amounts of simulated rain (0–20 mm)...
  10. Abnormalities of the growth point and ear of barley caused by 2,4-dichlorophenoxy acetic acid

    Abnormalities of the growth point and ear of barley caused by 2,4-dichlorophenoxy acetic acid

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Treatment of barley plants with 2,4-D, when the main tiller apical meristem was in the late vegetative or double ridge stage, resulted in the production of various abnormalities including missing spikes, branched spikes, whorls of spikelets and paired spikelets instead...