Economy
Rice Farmers Lose $200m Yearly to Parasitic Weeds
By Dipo Olowookere
An international team of researchers representing the Africa Rice Center (AfricaRice), the International Rice Research Institute (IRRI) and Wageningen University, has raised the alarm over the enormous economic impact of parasitic weeds on rice production in Africa, threatening the food security and livelihoods of millions of resource-poor rice farmers and consumers in the region.
Smallholder farmers in the continent are losing every year half a million tons of rice worth about US $200 million because of parasitic weeds.
This is roughly equivalent to the annual rice consumption of Liberia, a low-income country, which is highly dependent on rice imports.
If the rice lost due to the parasitic weeds had been saved, it would have been enough to feed the total population of Liberia (4.5 million people) for a whole year.
Parasitic weeds are among the most destructive and problematic weeds to control.
“When these plants invade food crops, they turn into ferocious weeds,” said Dr Jonne Rodenburg, Agronomist at AfricaRice.
The most important parasitic weed species in rice are Striga asiatica, S. aspera, S. hermonthica and Rhamphicarpa fistulosa. They are all endemic to Africa and can also parasitize other cereal crops like maize, sorghum and millet.
The team of researchers reveal that these parasitic weeds, which survive by siphoning off water and nutrients from host crops, have invaded 1.34 million hectares of rainfed rice in Africa, affecting an estimated 950,000 rural households. They are increasingly becoming severe due to an intensification of agricultural production and climate changes.
The areas affected by parasitic weeds are home to some of the world’s poorest farmers.
Studies by AfricaRice and partners have shown that parasitic weeds seem to predominantly affect women farmers in Africa as they are often forced to grow rice on the most marginal and parasitic weed-infested plots.
Parasitic weeds threaten rice production in at least 28 countries in Africa that have rainfed rice systems. The most affected countries are Burkina Faso, Cameroon, Côte d’Ivoire, Guinea, Madagascar, Mali, Nigeria, Sierra Leone Tanzania and Uganda.
The researchers warn that these parasites are spreading fast in the rainfed rice area and if nothing is done to stop them in their tracks, the damage will increase by about US $30 million a year.
These findings were revealed in a recent article by Rodenburg, Demont, Zwart and Bastiaans, entitled “Parasitic weed incidence and related economic losses in rice in Africa,” published in Agriculture, Ecosystems and Environment 235 (306-317).
Rice is the second most important source of calories in Africa. It is also critical for smallholder incomes. Demand for rice is growing at a rate of more than 6% per year – faster than for any other food staple in sub-Saharan Africa (SSA), because of changes in consumer preferences and urbanization. Rice production is increasing across SSA, but the continent still imports some 40% of its rice.
Until now, there has been little information on the regional spread and economic importance of parasitic weeds in rice in Africa. “We have presented in this article best-bet estimates on the distribution as well as the agronomic and economic impact of parasitic weeds in rice in Africa,” explained Dr Rodenburg. “In fact, this is the first multi-species, multi-country impact assessment of parasitic weeds in Africa.”
The article focuses on the four most important parasitic weeds in rice. Striga species – known under the common name “witchweed” – occur in at least 31 countries with rain-fed upland rice systems. Rhamphicarpa fistulosa – known under the common name “rice vampireweed” – threatens rice production in at least 28 countries with rainfed lowland rice systems.
Dr Sander Zwart, AfricaRice Remote sensing and Geographic information systems specialist, explained that for this study, a map of rainfed rice production areas, compiled from different databases, was overlapped with parasitic weed observation data retrieved from public herbaria to visualize regional distribution of these four important parasitic weeds.
From this overlap, probabilities of actual infestation were estimated. These estimates together with secondary data on parasite-inflicted crop losses and efficacy of weed control were combined into a stochastic impact assessment model.
The knowledge acquired on the distribution as well as the agronomic and economic impact of parasitic weeds in rice in Africa underlines the importance of finding effective measures to control these pests through research.
AfricaRice and its partners have been investigating and developing efficient parasitic weed management strategies that are affordable and feasible for resource-poor rice farmers. “A range of high-yielding, short-cycle, farmer-preferred rice varieties have been identified with resistance or tolerance to different species and ecotypes of Striga, as well as varieties with good defense against R. fistulosa,” said Dr Rodenburg.
He explained that such varieties can be combined with different agronomic measures, such as late sowing (against R. fistulosa) or early sowing (against Striga), and the use of organic soil fertility amendments. Growing a leguminous cover crop such as Stylosanthes guianensisand following a zero-tillage approach also contribute to effective control of Striga, as demonstrated by agronomic experiments conducted by AfricaRice and its partners.
To study institutional and socio-economic constraints underlying the challenge posed by the parasitic weeds, and to raise awareness and improve communication on efficient management strategies, AfricaRice and its partners have brought together stakeholders, including national research institutes, extension services, crop protection services and private sector representatives in workshops in East and West Africa.
At a time where there is a decline in public sector investments in agricultural research, efficient targeting of resources is becoming increasingly important. “The results of our studies emphasize the importance of targeted investments in further research, the development and dissemination of control technologies and capacity building of farmers, extension agents and other stakeholders, to reverse the observed trend of increasing parasitic weeds in rice,” stated Dr Rodenburg.
AfricaRice.
By Adedapo Adesanya
Food Concepts Plc neutralized the gains recorded by three securities, returning the NASD Over-the-Counter (OTC) Securities Exchange into the negative territory with a 0.27 per cent loss on Thursday, December 4.
Yesterday, the share price of the parent company of Chicken Republic and PieXpress declined by 34 Kobo to sell at N3.15 per unit compared with the previous day’s N3.49 per unit.
This shrank the market capitalisation of the OTC bourse by N5.72 billion to N2.136 billion from N2.142 trillion and weakened the NASD Unlisted Security Index (NSI) by 9.57 points to 3,571.53 points from 3,581.10 points.
Business Post reports that Central Securities Clearing System (CSCS) Plc went down by 50 Kobo to N38.50 per share from N38.00 per share, FrieslandCampina Wamco Nigeria Plc gained 29 Kobo to sell at N55.79 per unit versus N55.50 per unit, and Geo-Fluids Plc added 5 Kobo to close at N4.60 per share compared with Wednesday’s closing price of N4.55 per share.
Trading data indicated that the volume of securities recorded at the session surged by 6,885.3 per cent to 4.3 million units from the 61,570 units posted a day earlier, the value of securities increased by 10,301.7 per cent to N947.2 million from N3.3 million, and the number of deals went up by 146.7 per cent to 37 deals from the 15 deals achieved in the previous trading session.
At the close of business, Infrastructure Credit Guarantee Company (InfraCredit) Plc was the most traded stock by value on a year-to-date basis with the sale of 5.8 billion units for N16.4 billion, trailed by Okitipupa Plc with 170.4 million units worth N8.0 billion, and Air Liquide Plc with 507.5 million units valued at N4.2 billion.
InfraCredit Plc also finished the session as the most traded stock by volume on a year-to-date basis with 5.8 billion units transacted for N16.4 billion, followed by Industrial and General Insurance (IGI) Plc with 1.2 billion units sold for N420.2 million, and Impresit Bakolori Plc with 536.9 million units traded for N524.9 million.
By Dipo Olowookere
The upward trend witnessed at the Nigerian Exchange (NGX) Limited in recent sessions continued on Thursday as it further improved by 0.10 per cent.
This was despite investor sentiment turning bearish after the local equity market ended with 23 price gainers and 28 price gainers, indicating a negative market breadth index.
UAC Nigeria gained 10.00 per cent to finish at N88.00, Morison Industries appreciated by 9.94 per cent to N3.54, Ecobank rose by 8.53 per cent to N36.90, and Coronation Insurance grew by 8.47 per cent to N2.56.
On the flip side, Ellah Lakes depreciated by 10.00 per cent to N13.14, Eunisell Nigeria also shed 10.00 per cent to finish at N72.90, Transcorp Hotels slipped by 9.95 per cent to N157.50, Omatek shrank by 9.23 per cent to N1.18, and Guinea Insurance dipped by 8.46 per cent to N1.19.
Yesterday, the All-Share Index (ASI) went up by 152.28 points to 145,476.15 points from 145,323.87 points and the market capitalisation chalked up N97 billion to finish at N92.726 trillion compared with the previous day’s N92.629 trillion.
Customs Street was bubbling with activities on Thursday, though the trading volume and value slightly went down, according to data.
A total of 1.9 billion stocks worth N19.2 billion exchanged hands in 23,369 deals during the session versus the N2.3 billion valued at N21.0 billion traded in 21,513 deals a day earlier.
This showed that the number of deals increased by 8.63 per cent, the volume of transactions depleted by 17.39 per cent, and the value of trades decreased by 8.57 per cent.
For another trading day, eTranzact led the activity chart with 1.6 billion units sold for N6.4 billion, Fidelity Bank traded 31.0 million units worth N589.3 million, GTCO exchanged 28.3 million units valued at N2.5 billion, Zenith Bank transacted 27.1 million units for N1.6 billion, and Ecobank traded 21.9 million units worth N744.3 million.
By Adedapo Adesanya
The Naira marginally depreciated against the United States Dollar in the Nigerian Autonomous Foreign Exchange Market (NAFEM) on Thursday, December 4 amid renewed forex pressure associated with December.
At the official market yesterday, the Nigerian currency lost 0.01 per cent or 18 Kobo against the Dollar to close at N1,447.83/$1 compared with the previous day’s N1,447.65/$1.
It was not a different scenario with the local currency in the same market segment against the Pound Sterling as it further shed N15.43 to sell for N1,930.97/£1 versus Wednesday’s closing price of N1,925.08/£1 and declined against the Euro by 20 Kobo to finish at N1,688.74/€1 compared with the preceding session’s N1,688.54/€1.
Similarly, the Nigerian Naira lost N5 against the greenback in the black market to quote at N1,465/$1 compared with the previous day’s value of N1,460/$1 but closed flat against the Dollar at the GTBank FX counter at N1,453/$1.
Fluctuations in trading range is expected to continue during the festive season as traders expect the Nigerian currency to be stable, supported by intervention s by to the Central Bank of Nigeria (CBN)in the face of steady dollar demand.
Support is also expected in coming weeks as seasonal activities, particularly the stylised “Detty December” festivities, will see inflows that will give the Naira a boost after it depreciated mildly last month, according to a new report.
“As the festive Detty December season intensifies, inbound travel, tourism spending, and diaspora inflows are expected to provide moderate support for FX liquidity,” analysts at the research unit of FMDA said in its latest monthly report for November.
Traders cited by Reuters expect that the Naira will trade within a band of N1,443-N1,450 next week, buoyed by improved FX interventions by the apex bank.
Meanwhile, the crypto market was down as the US Federal Reserve’s preferred inflation gauge, core PCE, likely rose in September—moving in the wrong direction. However, volatility indices show no signs of major turbulence.
If the actual figure matches estimates, it would mark 55 straight months of inflation above the US central bank’s 2 per cent target. The sticky inflation would strengthen the hawkish policymakers, who are in favour of slower rate cuts.
Ripple (XRP) depreciated by 4.5 per cent to $2.08, Solana (SOL) went down by 3.8 per cent to $138.11, Litecoin (LTC) shrank by 3.1 per cent to $83.23, Dogecoin (DOGE) slid by 2.5 per cent to $0.1463, Cardano (ADA) declined by 2.1 per cent to $0.4368, Bitcoin (BTC) fell by 0.9 per cent to $91,975.45, Binance Coin (BNB) crumbled by 0.9 per cent to $899.41, and Ethereum (ETH) dropped by 0.7 per cent to $3,156.44, while the US Dollar Tether (USDT) and the US Dollar Coin (USDC) closed flat at $1.00 apiece.
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