Articles by Keyword: Post Emergence Cyanazine Atrazine Paraquat Wetting Agent

Search results for Post Emergence Cyanazine Atrazine Paraquat Wetting Agent

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  1. Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages

    Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of herbicides which scorched the lower leaves of maize was compared in three seasons. The first season was relatively dry whilst the other two were wetter seasons. A mixture of cyanazine + atrazine + paraquat + a wetting...
  2. Recovery of grain sorghum [<em>Sorghum bicolor</em> (L.) Moench] from atrazine and cyanazine phytotoxicity

    Recovery of grain sorghum [<em>Sorghum bicolor</em> (L.) Moench] from atrazine and cyanazine phytotoxicity

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Recovery of growth following atrazine and cyanazine toxicity and the effect on subsequent grain yield of sorghum were studied in nutrient solutions in two separate experiments. In Experiment I, concentrations of atrazine and cyanazine were decreased at weekly intervals based...
  3. Effect of soil nutrient status on severity of seedling diseases and root rot of sorghum (<em>Sorghum bicolor</em>)

    Effect of soil nutrient status on severity of seedling diseases and root rot of sorghum (<em>Sorghum bicolor</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The hybrid NK283 was subjected to a range of nutrient element concentrations to determine their effect on predisposition of sorghum to seedling diseases and root rot. Emergence was not affected by soil nutrient status. Similarly N, P and K did...
  4. Die beheer van <em>Amaranthus</em> spp. en die invloed daarvan op <em>Digitaria eriantha</em> gedurende die vestigingsjaar

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The control of Amaranthus spp. and the influence thereof on Digitaria eriantha during the season of establishment. Chemical control of Amaranthus spp. in newly established Smuts finger grass (D. eriantha) was investigated. A mixture of 800 ml 2,4‐D Amine+1200 ml...
  5. Factors affecting the activity of atrazine in plants and soil

    Factors affecting the activity of atrazine in plants and soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Available research findings concerning (he activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning...
  6. Growth responses of inbred maize lines with high and low DIMBOA (benzoxazinone) contents to atrazine

    Growth responses of inbred maize lines with high and low DIMBOA (benzoxazinone) contents to atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The growth response of five inbred maize lines with high and low DIMBOA content were compared in the presence of 3 and 12 ppm atrazine. A growth-promoting effect of atrazine on roots, mesocotyls and coleoptiles was observed in dark-grown seedlings...
  7. Ultrastructural changes in the leaves of <em>Zea mays</em> L. plants treated with atrazine

    Ultrastructural changes in the leaves of <em>Zea mays</em> L. plants treated with atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine (2-chloro-4-ethylamino-6- isopropylamino-s-triazine). An ultrastructural investigation indicated that mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration. The seemingly unaffected bundle sheath chloroplasts...
  8. Tolerance of South African maize (<em>Zea mays</em> L.) cultivars to atrazine

    Tolerance of South African maize (<em>Zea mays</em> L.) cultivars to atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sixty-seven maize cultivars were evaluated for tolerance to atrazine (4 p.p.m. v/v) in nutrient solution. Shoot dry masses (SDM) of only two cultivars, SAB149 and NPP x K64r, were reduced more than 40% and another 14 were reduced by more...
  9. Reduced leaf diffusive resistance with re-exposure of maize (<em>Zea mays</em> L.) to atrazine

    Reduced leaf diffusive resistance with re-exposure of maize (<em>Zea mays</em> L.) to atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Application and subsequent removal of atrazine in a nutrient solution resulted in changes in leaf diffusive resistance in maize. Re-exposure to atrazine elicited lower responses in leaf diffusive resistance, suggesting an improved tolerance to atrazine by maize. The time elapsed...
  10. Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Thirty-three maize (Zea mays L.) inbreds were screened for tolerance to atrazine (2-chloro-4-ethylamino-6- isopropylamino-1,3,5-triazine) in a glasshouse using a sand culture technique. Tolerance ranged from 95,7–51,0% of the control. The continuous pattern of tolerance exhibited by the inbreds indicated polygenic...