Effects of tianda 2116 plant growth regulator on growth and yield of winter wheat (Triticum aestivum L.)

To achieve optimum yield of wheat, supplementation of soil and foliar applied fertilizers with plant growth regulators is vital to assure effective assimilation of nutrients by plants. A trial was conducted at Gwebi Agricultural College Farm in Mashonaland West Province of Zimbabwe, during the 2012 winter wheat season (May to August), to evaluate the effects of differing times of application of Tianda 2116 plant growth regulator on the growth and yield of wheat (variety SC Sekuru). The trial was laid out in a Randomized Complete Block Design with three replications. The treatments were: Tianda 2116 applied at the following weeks after planting (WAP): 2 WAP, 3 WAP, 4 WAP, 5 WAP, 6 WAP, 14 WAP and no Tianda 2116 applied (control). No significant differences (P > 0.05) were noted among treatments for mean number of tillers per plant and mean number of spikes per plant. Application of Tianda 2116 at 2 and 3 WAP delayed flowering and physiological maturity. Early application of Tianda 2116 increased the number of spikelets per spike, thousand grain weight and grain yield. Conclusively, Tianda 2116 applied 2 or 3 WAP is effective in reducing growth while enhancing yield parameters in wheat production

Prevalence and predictors of late presentation for HIV care in South Africa

Background. Many people living with HIV in South Africa (SA) are not aware of their seropositive status and are diagnosed late during the course of HIV infection. These individuals do not obtain the full benefit from available HIV care and treatment services.Objectives. To describe the prevalence of late presentation for HIV care among newly diagnosed HIV-positive individuals and evaluate sociodemographic variables associated with late presentation for HIV care in three high-burden districts of SA.Methods. We used data abstracted from records of 8 138 newly diagnosed HIV-positive individuals in 35 clinics between 1 June 2014 and 31 March 2015 to determine the prevalence of late presentation among newly diagnosed HIV-positive individuals in selected high-prevalence health districts. Individuals were categorised as ‘moderately late’, ‘very late’ or ‘extremely late’ presenters based on specified criteria. Descriptive analysis was performed to measure the prevalence of late presentation, and multivariate regression analysis was conducted to identify variables independently associated with extremely late presentation.Results. Overall, 79% of the newly diagnosed cases presented for HIV care late in the course of HIV infection (CD4+ count ≤500 cells/µL and/or AIDS-defining illness in World Health Organization (WHO) stage III/IV), 19% presented moderately late (CD4+ count 351 - 500 cells/µL and WHO clinical stage I or II), 27% presented very late (CD4+ count 201 - 350 cells/µL or WHO clinical stage III), and 33% presented extremely late (CD4+ count ≤200 cells/µL and/or WHO clinical stage IV) for HIV care. Multivariate regression analysis indicated that males, non-pregnant women, individuals aged >30 years, and those accessing care in facilities located in townships and inner cities were more likely to present late for HIV care.Conclusions. The majority of newly diagnosed HIV-positive individuals in the three high-burden districts (Gert Sibande, uThukela and City of Johannesburg) presented for HIV care late in the course of HIV infection. Interventions that encourage early presentation for HIV care should be prioritised in SA and should target males, non-pregnant women, individuals aged >30 years and those accessing care in facilities located in inner cities and urban townships.Â