PARASITE is happy to announce a new publication by our PhD researched Dennis Tippe and colleagues entitled: “Delayed or early sowing: Timing as parasitic weed control strategy in rice is species and ecosystem dependent”.
Parasitic weeds are a severe problem in rain-fed rice production ecosystems in sub-Saharan Africa. In a recent paper, published in Field Crops Research (Volume 214, pages 14-24), the effect of sowing time of rice on parasitic weed infection and crop yield was investigated. Experiments were conducted in a Striga asiatica-infested upland field and a Rhamphicarpa fistulosa-infested lowland field, from 2012 to 2014 in Kyela district, Tanzania.
In each experiment, three rice varieties were planted at five sowing times, the first coinciding with the start of the rainy season and the four other ones followed each at two weeks’ intervals. The chosen rice varieties were the late maturing local varieties Supa India (upland and lowland) and Mwangulu (upland) and earlier-maturing NERICA-14 (upland), NERICA-L-20 (lowland) and IR64 (lowland) as alternatives. In addition, a greenhouse pot-experiment was conducted in Wageningen, the Netherlands, combining staggered planting of rice at two weeks’ intervals with introduction of either S. asiatica or R. fistulosa at one moment in time.
In both field and pot experiments sowing time influenced parasite growth and rice grain yield, but the direction of these effects differed considerably between weed species and associated agro-ecosystems. We conclude that manipulating rice-sowing time is a feasible control strategy to minimize parasitic weed infection, but the proper application and associated risk of this practice are strongly species and ecosystem dependent.
Pleasre refer to this paper as: Tippe DE, Rodenburg J, van Ast A, Anten NPR, Dieng I, Kayeke JM, Cissoko M, Bastiaans L. 2017. Delayed or early sowing: timing as parasitic weed control strategy in rice is species and ecosystem dependent. Field Crops Research 214, 14-24
The paper can be accessed here: http://www.sciencedirect.com/science/article/pii/S0378429017307232