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A survey of the market diseases and aflatoxin contamination of tomato fruits was conducted in Sokoto in northwestern Nigeria in 2001 and 2002, respectively. Rotten tomato fruits sold at five different markets in Sokoto town, located at Central market, Kasuwar daji, Mabera, Minanata and Arkilla were heavily contaminated with moulds. Eight different fungi were found associated with the rotten tomato fruits sold in the five different markets. The associated fungi were Aspergillus niger, Aspergillus ochraceous, Aspergillus flavus, Aspergillus fumigatus, Penicillium citrinum and Helminthosporim fulvum, Curvularia lunata and Sclerotium rolfsii. A. flavus and A. niger have the highest rate of occurrence among the isolated fungi, while S. rolfsii was the least encountered. Pathogenicity tests revealed that of all the isolated fungi, A. ochraceous, A. flavus, Sclerotium rolfsii and P. citrinum were highly pathogenic with the first three leading to rapid disintegration of treated fruits in 3‐5 days. A. niger was moderately pathogenic, while H. fulvum was least pathogenic on tomato fruits. Aflatoxins were detected from the sampled diseased‐marketed tomato fruits and also from the marketed rotten tomato fruits after autoclaving for 15 minutes at 121°C.

The etiology of fruit anthracnose in hot pepper (Capsicum frutescens) was investigated at Ibadan, Osogbo, and Ikenne in the lowland forest zone of western Nigeria. Collectotrichum capsici (Synd) Butler & Bisby was found associated with the fruit anthracnose of hot pepper in all locations. Out of 300 plants examined in all the locations, over 70 per cent had fruit anthracnose, while in some pepper fields all the fruits produced had the disease symptom. The pathogen overseasoned in pepper plant debris. A high inoculum population of 4.9×10⁶ g⁻¹ colony forming units/g was estimated in the soil of pepper fields. The seed from the infected hot pepper fruits also carried propergules of the pathogen. The fungus was also found on Lycopersicon esculentus, C. annum and Vigna unguiculata growing in and around the pepper fields. Pepper fruits infection by the disease occurs during the peak of the rainy season beginning in patches which spread later, resulting in extensive infection of the pepper field.

White maize-based porridge is a staple food for about 80 per cent consumers in South Africa and in other sub-Saharan African countries contributing significantly to the diet of rural population in developing countries. White maize is deficient in some amino acids and over-dependency on its porridge may lead to high prevalence of malnutrition-related health conditions. Moringa oleifera (MO) and termite (Macrotermes falciger) are known to contain substantial amount of protein. The purpose of this study was to determine the effect of powders from MO leaves and termite on the nutritional and sensory properties of instant maize porridge.

Inclusion of MO and termite powder in instant maize porridge, using different treatments were considered using a completely randomised design. Factor levels were control (maize flour) cooked, blanched and uncooked MO samples. Data were analysed using SPSS version 23.

Protein content of fortified instant maize porridge (FMP) significantly increased from 10.0 to 21.2 per cent compared to unfortified porridge, and this could be attributed to the substitution effect, as fresh uncooked MO leaves are reported to be high in protein. Mineral content of FMP was higher in zinc, iron, calcium and magnesium. Calcium values of FMP were higher (276.8 mg/100 g) compared to unfortified porridge (7.1 mg/100 g). Upon the addition of MO leaves and termite powder, the zinc content increased from 3.4 mg/100to 7.6 mg/100 g. Higher iron values (27.9-36.9 mg/100 g) were observed among fortified samples. The sensory result showed that control sample had higher acceptance than the fortified samples (p = 0.02). Sensory analysis showed that among fortified porridges, blanched sample was rated high for colour and texture, cooked sample was higher in taste and uncooked sample was higher for aroma. Control sample had higher acceptance than fortified porridges for taste. The results of this study showed that the addition of MO leaves and termite powder to instant maize porridge has led to a substantial increase in the nutritional value of FMP.

This study was carried out to develop instant maize porridge fortified with MO leaves and termite powder suitable for infants, pregnant mothers and other maize consumers. The author aimed at improving the nutritional content of instant maize porridge by combining it with MO leaves and termite powders. The results showed that the addition of MO leaves and termite powders to instant maize porridge has led to a substantial increase in the nutritional value of FMP. Therefore, powder from MO leaves and termites could be used in complementary foods to increase protein and mineral contents.

The purpose of this paper is to evaluate the physico‐chemical properties of African star apple (Chrysophylum albidum) components. African star apples are among the under‐utilized fruits in Nigeria therefore, the four succulent components (peel, pulp, juice and pericarp) of the fruit were analyzed and compared with other known fruits.

African star apples were purchased and divided into two portions. The first portion was washed and the juice was expressed manually into a bottle and covered, while in the second portion, the peel, pulp and the pericarp (mucilage on the seeds) were separated. The physico‐chemical analyses (moisture, total solid, pH, titratable acidity, total sugar, carotenoids, ascorbic acid and total soluble solids) were carried out on the four components.

Moisture content ranged from 53.5 per cent in peel to 86.3 per cent in juice, while the peel had higher total solid and the least was in the juice. The pH of peel was lower than that of other components. The peel had lower titratable acidity (1.2 per cent) and sugar (0.9 Brix) while the juice had higher value (5.4 Brix) in sugar and 15.0 mg/100 g carotenoid. The juice was rich in ascorbic acid (28.5 mg/100 g) followed by the pulp (25.0 mg/100 g). The pulp had higher total soluble solids (24.8 per cent) and the least was in the pericarp (9.8 per cent).

The physico‐chemical properties of the African star apple fruit gave an indication of the usefulness of this fruit in brewing industry especially for wine making and jelly or jam manufacture. Processing of this fruit will curb wastage during its season and make it available in different form.

The purpose of this paper is to estimate production and scale efficiency of maize producing farms in South-Western Nigeria.

This study is based on a semi-parametric approach and uses a combination of econometrics and linear programming to build two stage Data Envelopment Analysis (DEA) model.

Model findings shows existence of production and scale inefficiencies in maize production. The study concludes that there is still room for efficiency improvements in the existence of the current maize production technology. It also finds several socio-economic variables such as, off-farm work, education, extension services and credit, which positively impact on technical efficiency of farm households.

Efficiency indicators could be used to monitor resource use efficiency in crop production by local government.

Efficiency improvements will increase maize production in the country which in turn reduce social unrest and food insecurity.

This study is one of the first which has employed DEA approach to analyze maize productivity and pioneer in using non-traditional bootstrapping approach to obtain robust efficiency scores in the case of Nigeria.

The purpose of this paper is to investigate the relationship between monetary policy and economic growth in the light of a developing economy, with the main focus on Malaysia. Primarily, the research will concentrate on the interactions between interest rates, inflation, money supply and growth in GDP, which will serve as the instrument for measuring economic growth.

The research will apply quantitative analysis to determine the relationship between GDP growth and monetary policy instruments, particularly interest rate, money supply and level of inflation. Given the advancement and achievement in econometric analysis and computer software creation, the least-squares estimates analysis will be used to investigate the relationship and significance between these variables.

It is observed that relationship between economic growth and inflation is positive. This entails that a 1 percent change in inflation will result in a 77 percent increase in the level of economic growth in this economy. The linkage between economic growth and interest rates has also been observed to be positive. A positive nexus can be observed between economic growth and money supply. The coefficient value of 0.02 for money supply growth shows that it has the smallest effect on economic growth amongst the variables tested in the model.

Based on the findings of this study, the following recommendations can be made, which could serve as policies instruments for Malaysian economic development. This does not mean that the findings can be generalized for other developing economies.

Observations from the test for economic application significance are based on the signs of the parameters. It was observed that inflation, interest rates and money supply all have a positive relationship with economic growth, which is in line with the a priori expectations. This means that monetary policy has positively affected the economic growth.

The results of the OLS analysis reveal that the monetary policy instruments used for the model demonstrated that monetary policy has a positive relationship with economic growth in Malaysia. A breakdown of the individual monetary policy instruments shows that the interest rate, inflation and money supply all have individual positive relationships with economic growth.

A positive relationship exists between economic growth in Malaysia and all selected monetary instruments, namely, inflation, money supply and interest rate. The results show that the results show that inflation, interest rate and money supply will cause the economy to grow but their contribution to the developments is affected from other policy instruments which are used by the governments.

Climate change is perhaps the most serious environmental threat to agriculture in Africa, because of its impact on pre- and post-harvest agricultural productivity. The purpose of this study is to provide empirical information on the challenges of cassava post-harvest adaptation to climate change.

The study was conducted in two randomly selected states of southeast Nigeria. Data collection was done in two phases; first, there was a rapid rural appraisal and then a detailed survey using a questionnaire administered to 320 randomly selected cassava processors, 40 from each of eight randomly selected cassava farming communities.

The respondents were predominantly women, who process, and grow cassava. The factors affecting their level of vulnerability were gender, household size and farm size. While women were more vulnerable than men, households with greater number of persons and/or larger farm size were less vulnerable. Women's vulnerability declined from the 25th income quantile through the 50th to the 75th while the positive effect of farm and household size increased through the same trend. Education was only positively important for the 75th income quantile. The factors constraining adaptation were scarcity of processing inputs, institutional, water and poverty constraints.

Available literature show that most of the recent studies on climate change and agriculture have tended to concentrate on pre-harvest. Ozor et al. studied barriers to climate change adaptation among farm households of southern Nigeria. Enete and Onyekuru studied empirical evidence of challenges of agricultural adaptation to climate change, also among farmers of southeast Nigeria. Enete and Amusa presented a literature survey of challenges of agricultural adaptation to climate change. This study is, not only commodity specific, but also focused on post-harvest.

The coronavirus disease 2019 (COVID-19) pandemic altered business and personal activities globally especially stimulating contactless financial transactions. However, despite the similar national lockdowns in cash-based economies, the adoption of contactless transactions through the widely available mechanism, mobile wallets, remained low. This research aimed to identify the factors surrounding this peculiarity.

The study was investigated using a composite model based on the diffusion of innovation theory (DIT), technology acceptance model (TAM) and information systems success model (ISSM). Data were collected from 621 Cameroonian mobile wallet users and analyzed using partial least squares structural equation (PLS-SEM) modeling.

The key findings revealed that the usage of mobile wallets, in the current form, were not affected by the perceived ease of use and did not match the existing lifestyle of users in Cameroon (no compatibility). The branding of mobile wallets (image) which was based on global messaging did not appeal to Cameroonians; in fact, the branding gave mobile wallets a negative image.

These key findings reveal the dangers of assuming that global strategies which have been effective in dealing with the pandemic will be effective in low-income or cash-based economies. The findings suggest that considering essential contextual dispositions is critical.

Motivated by recent rapid exchange rate depreciations, shrank economic growth, high inflation, and persistent trade deficits, this study examines the trade balance (TB) in the face of the recent dynamics of the stated macroeconomic factors, which are also important determinants of the TB. The symmetric test of the J-curve phenomenon for the selected Sub-Saharan African (SSA) countries is revisited in this regard. The study uses panel data from 1970 to 2020 for ten of these countries for the longitudinal panel analysis with the TB as the dependent variable and the real exchange rate, foreign and domestic national incomes, and trade openness as the set of independent variables.

Because the underlying data set involves a heterogeneous panel of relatively short N and long T, the pooled mean group (PMG) and mean group (MG) heterogeneous panel models are employed based on the Hausman test for parameter consistency in heterogeneous panels.

The findings largely support the domestic income growth– TB worsening and the foreign income growth– TB improvement hypotheses. Trade openness is found to mostly augment the TB performance of the countries. The results also validated the J-curve effect for only 3/10 and 2/10 countries in the PMG and MG models, respectively. The divergence for most of the countries is attributed to possible import compression and institutional structure of SSA countries.

Given the favorable effects of trade openness on the TB performance of SSA countries, it is recommended that SSA countries place much emphasis on import-substitution industrialization and value addition to their natural resources as well as investment-driven growth policies to improve the competitiveness of their exports and reverse the chronic deficits in their TBs.

This paper is unique for invoking heterogeneous panel models to analyze the TB in light of recent dynamics of its determinants, as well as providing an update on the symmetric test of the J-curve phenomenon for the selected SSA countries.

The purpose of this paper is to examine the relationship between government expenditure and economic growth in Botswana over the period 1985‒2016. The study employed the auto-regressive distributed lag (ARDL) bounds testing approach in investigating the nexus. The study makes the argument that the effectiveness of public spending should be assessed not only against the amount of the expenditure but also by the type of the expenditure. The empirical findings showed that aggregate expenditure has a negative short-run and positive long-run effect on economic growth. When expenditure is disaggregated, both forms of expenditures have a positive short-run effect on economic growth, whereas only a long-run positive impact of recurrent expenditure is observed. The study suggests the need to prioritize scarce resources in productive recurrent and development spending that enables increased productivity.

This study examined the effectiveness of government spending in Botswana, within an ARDL framework from 1985 to 2016. To achieve this, the analysis is carried out on both an aggregate and disaggregated level. Government spending is divided into recurrent and development expenditures.

This study examined the effectiveness of government spending in Botswana, within an ARDL framework from 1985 to 2016. To achieve this, the analysis hinged on both the aggregate and disaggregated levels. The results of the aggregate analysis suggest that total public expenditure has a negative impact on economic growth in the short run; however, its impact becomes positive over the long run. On disaggregating government spending, the results show that both recurrent and development expenditures have a significant positive short-run impact on growth; however, in the long run, the significant positive impact is only observed for recurrent expenditure.

The results provide evidence of the diverse effects of government expenditure in the country. In the period under investigation, 73 percent of total government expenditure in Botswana was recurrent in nature, whereas 23 percent was related to development. From the results, it can be observed that although the recurrent expenditure has contributed to increased growth and must be encouraged, it is also pertinent for the Botswana Government to endeavor to place more emphasis on productive development expenditure in order to enhance short- and long-term growth. Further, there is a need to strengthen the growth-enhancing structures and to prioritize the scarce economic resources toward productive spending and ensuring continued proper governance over such expenditures.

The study provides empirical evidence on the effectiveness of government spending in a small open, resource-reliant middle-income SSA economy and argues that the effectiveness of public spending must be assessed not only against the amount of the expenditure but also on the type or composition of the expenditure. The study contributes to the scant empirical literature on Botswana by employing the ARDL approach to cointegration technique in estimating the long- and short-run impact of government expenditure on economic growth between 1985 and 2016.