Browsing by Author "Arthur, Stephen"

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Evaluation of herbicides and fungicides on groundnut (Arachis Hypogaea l.) quality and productivity.
    (November, 2016) Arthur, Stephen
    To determine the contribution of the interactive effect of weed control methods and fungicides application on groundnut growth, yield and quality, two experiments were conducted in the major and minor seasons of 2015 at the Council for Scientific and Industrial Research – Crops Research Institute (CSIR-CRI), Kwadaso station. Experiments were factorial laid in RCBD with four replications and variety Yenyawso was planted. Weed control treatments in the major season were: 3X Hand weeding (HW), Butachlor (preemergence), Bentazone @ 3 weeks after planting (WAP), Propaquizafop @ 3 WAP + HW @ 5 WAP, Bentazone + Propaquizafop @ 3 WAP, Butachlor + Bentazone + Propaquizafop @ 5 WAP, and Butachlor + HW @ 5 WAP. Minor season weed control treatments were: Metolachlor (PRE), Imazethapyr (POST) @ 3 WAP, PRE + POST, PRE + HW @ 5 WAP, POST + HW @ 5WAP, PRE + POST + HW @ 5 WAP, 2X HW, and a Non-weeded control. Fungicide treatments were: No Fungicides application or Terbuconazole (4 and 6 WAP) followed by Azoxystrobin (5 and 7 WAP) for both seasons. No fungicides and herbicide interaction (p>0.05) were recorded due to the dry weather conditions in 2015, which did not support disease development, apart from the tolerance of the variety planted. Bentazone was effective on Commelina benghalensis while Imazethapyr effectively suppressed Commelina benghalensis and Euphorbia heterophylla. All weed control treatments except preemergence only or the non -weeded effectively (p<0.05) reduced weed density and growth; and enhanced peanut growth and yield. Pod yield of 2.1 – 2.2 tons/ha was recorded for 2-3X HW, herbicides - manual weeding integration recorded 1.6 -2.3 tons/ha, and preemergence followed-up with postemergence, 1.7 – 2.1 tons/ha. Preemergence only and non-weeded resulted in yield loss of 43 – 71%. The weight of 100 seed lots were, however, similar (P>0.05) regardless of treatments. While preemergence herbicides only or non-weeded treatments had ≤ 55% unfilled pods, ≤ 20% unfilled pods were recorded for other weed control treatments. Aflatoxin levels of fresh and dried seeds were very low (≤ 2.0 ppb). Herbicides – manual weeding integration reduced weed control time requirement by 55 – 70% relative to manual weeding only (64 -67 man-days/hectare/season). Cost of manual weeding was GH₵790.00 – 1,668.00 depending on farmer practice and herbicide – manual weeding integration reduced manual weeding cost by 26 – 66%.