Tables 1 shows selected socio-economic characteristics of the surveyed households as averages per village. The mean monthly income per household is US$108.57, largest in Simandala and lowest in Dumbwe. The average age of the participants is 45.37 years. Of the seventy participants, 61.4 were female and 38.6 were male. Their ages ranged from 18 to 66 years, with 45 years as the median. Family members ranged from 3 to 11, with the mean household size being 6 persons. The majority of the households (57.1%) comprised between 5 and 6 family members, while 30.1% comprised 7-11 family members and 12.8% had less 5 family members. The majority of the households (91.4%) had incomes not exceeding US$100, a very small proportion of the participants (8.6%) had incomes ranging between US$100 and US$200. The result of the household income level in Table 1 revealed that the mean household is US$108.57. This indicated that majority of the participants are very poor because their household income were far below the poverty datum. Poverty line (PDL for July at US$495) represents the cost of a given standard of living that must be attained if a person is deemed not to be poor (Dube et al., 2016).
When consumed, the average mushrooms quantities per meal per household was 1.400kg in Dumbwe, 1.320kg in Donga and 1.580kg in Simandala. All villages collected the wild edible mushrooms from the forests and would accompany the staples. Similar reports were obtained by Collection of mushrooms in Zimbabwe (2002), who reported that wild edible fungi are commonly collected, sold and consumed and households eat up to 20kg of wild edible mushrooms in a productive year but only 5-10kg in deforested areas of Zimbabwe. Boa (2004) also reported that wild edible fungi are collected for food, rural people eat wild edible fungi both as a matter of choice and as a food of last resort.
Table 1: Socio-economic household characteristics by village
Variable
|
Dumbwe
|
Donga
|
Simandala
|
N
|
20
|
25
|
25
|
Household size (number)
|
6.4
|
6.28
|
5.92
|
Household income (US$)
|
100
|
104
|
120
|
Age (years)
|
44.95
|
44.72
|
46.36
|
Amount consumed (kg)
|
1.400
|
1.320
|
1.580
|
Source: Authors
Taxonomic diversity of wild edible mushrooms
Table 2 shows the wild edible mushrooms reported and consumed in the three villages. A total of seven ethnospecies of wild edible mushrooms were reported and consumed in the study area. Most frequently cited and consumed ethnospecies were Nhedzi (Amanita loosii [zambiana], 100% of the participants) Zhouchuru (Termitomyces titanicus, 100% of the participants), 85.7% cited and consumed Bowa hwepamuuyu (Termitomyces spp), 62.9% and 65.7% cited and consumed Tsvuketsvuke (Cantharellus spp) and Huzutwe (Termitomyces clypeatus), respectively. The remainder of the wild edible mushrooms were characterised by low citation and consumption, only mentioned and consumed by less than 50% of the participants, these include: Zheve (Lactarius kabansus), 48.6% and Nyabururu (Amanita spp), 30%, showing they were probably of less importance in terms of their contribution to food security compared to highly cited and consumed first three species. The current study ethnospecies list is comparable with 199 vernacular names mainly for edible mushrooms recorded by Pierce & Sharp (2000). A large number of wild edible mushroom parts consumed in the current study (5, 71.4%) are head and stalk, with major use as relish, accompanying the main staple foods i.e. maize meal/pearl millet/millet thick porridge called sadza in local language (Nsima in Tonga). A study in Malawi by Boa (2004) on picking of wild edible mushrooms (bowa) by Mr Kenasi showed that the bottom part of the stalk was thrown away the wild edible mushroom parts sold and consumed in Malawi were only heads. This disagrees with the current findings where the authors reported a larger proportion of the participants consumed both head and stalk. Interviews with participants revealed that the majority of wild edible mushrooms were collected during rainy and towards harvest season, December to March. The rainy season is characterized by a broader diversity of nutritional foods including fresh wild edible mushrooms. Similar results were obtained by Yongabi et al. (2004), who found onset of rainy seasons to be important as it is customary to find rural people across many African countries (for example, Cameroon, Nigeria, Malawi, Ghana, Benin Republic, Togo, Uganda, Ethiopia, Kenya, Equatorial Guinea and Zimbabwe) going out to search wild edible mushrooms from decaying wood and palm trees.
Table 2: Wild edible mushrooms reported in the three villages
Tonga
|
Ethnospecies
|
Scientific name
|
Plant part
|
Culinary use
|
Bakapyapya
|
Tsvuketsvuke
|
Cantharellus spp
|
Head & stalk
|
Relish
|
Bakayanda
|
Nhedzi
|
Amanita loosii (zambiana)
|
Head & stalk
|
Relish
|
Bwabbaya
|
Bowa hwepamuuyu
|
Termitomyces spp
|
Head & stalk
|
Relish
|
Indyuu
|
Zhouchuru
|
Termitomyces titanicus
|
Head & stalk
|
Relish
|
Madongila
|
Nyabururu
|
Amanita spp
|
Head
|
Relish
|
Mbuse
|
Huzutwe
|
Termitomyces clypeatus
|
Head & stalk
|
Relish
|
Nowa
|
Zheve
|
Lactarius kabansus
|
Head
|
Relish
|
Note: Relish in the Zimbabwean context are main or side dishes accompanying the maize meal thick porridge called sadza.
Source: Authors
Culinary use and preparation of wild edible mushrooms
The most consumed wild edible mushroom types were Nhedzi and Zhouchuru, consumed by all the participants (100% of the participants), mostly as fresh relish, while Nyabururu and Zheve were consumed by less than 50% of the participants (30% and 48.6%, respectively). Results from the current study shows that 95.7% of the households served the wild edible mushrooms as the main relish with the main staples. The wild edible mushrooms types were frequently mixed in one pot, in rare cases, a sole type was cooked that is if the harvest was good. The wild edible mushrooms were just boiled and then salt added to taste and served, but in rare cases, cooking oil or peanut butter, or locally produced fresh cream and tomatoes would be added to make a sauce. The most consumed parts of the wild edible mushrooms are head and stalk, frequently combined, boiled and served as relish and the reasons for continued consumption of these wild edible mushrooms included economics and lack of alternatives to accompany the main staples. In this context, the wild edible mushrooms play significant roles as far as food security is concerned in these areas of the study, they add flavour to the staples. Research by Save the Children (2001) showed that the wild foods play quite an important role in people’s diets, contributing around 10-15% of energy and micronutrients requirements, high amounts during time of food scarcity. Similarly, Ojelel et al. (2019) reported the importance of wild foods in the subsistence of many human populations particularly when the availability of food crops is scarce, when household budgets are not enough to buy enough food or when access to markets is challenging. Also, findings from Maroyi (2013) showed that edible foods contributed (100%) towards food security and nutrition for the people in Shurugwi.
Coefficients of wild edible mushrooms consumption by village
Table 3 shows the coefficients of wild edible mushrooms consumption by village. The sign of the coefficient shows the direction of the variables in relation with the dependent variable. The coefficients of wild edible mushrooms consumption per village were negative for Donga, positive for Simandala and not significant at p<0.05 level. Two dummy variables were used for the three villages, Dumbwe being constant, whereas D1 and D2 for Donga and Simandala, respectively. The average consumption of wild edible mushrooms per meal per household is 1436 grams. The result is different from the result obtained by Manduna & Vibrans (2018) on consumption of wild-growing foods in the Honde valley in which the average quantities per meal per family were around 700 grams in Chipupuri and around 500 grams in Maradzika. The variable household size is positive and significant at p<0.05 level. This implies that as the household size increases, the amount of wild edible mushrooms consumed per meal increases by 206.5grams. Similar results were reported by Adegbenjo et al. (2020) on factors influencing the consumption of wild and cultivated mushroom species in South-western Nigeria, where they observed a positive at p<0.01 level of significance on household size variable. On the other hand, location (Simandala), age of participants and household income had a positive coefficients of wild edible mushrooms consumption although not statistically significant. Additionally, location- Donga and gender had negative coefficients of wild edible mushrooms consumption, also not statistically significant. Our results confirm Adegbenjo et al. (2020) findings, who stated that gender has a positive correlation with the likelihood of the respondents to consumption although their results were not statistically significant. In our case male participants consumed less than female counterparts though not statistically significant.
Table 3: Coefficients of wild edible mushrooms consumption by village
Variable name
|
Wild edible mushrooms consumption per household
|
|
Coefficient
|
p-value<0.05
|
Location variables
|
Constant
|
1400
|
.000
|
Donga (D1)
|
-80
|
.644
|
Simandala (D2)
|
180
|
.300
|
Socio-demographic and socio-economic variables
|
Constant
|
305.974
|
.432
|
Age of respondent
|
7.336
|
.103
|
Household size
|
206.523*
|
.000
|
Household income
|
1.210
|
.552
|
Constant
|
2.898
|
.000
|
Male respondents
|
-0.899
|
0.436
|
- Note: * denotes significant at 5%.
- Dependent variable: Consumption/household/per meal in grams, age/years, household size/number of persons, household monthly income in USD, and gender of the respondent.
Source: Authors
Figure 1 depicts the frequency of consumption of wild edible mushrooms in the three villages of Binga district. About 43% of the participants consumed wild edible mushrooms once every day, 19% twice every day, and 14% every second day, underpinning the potential importance of wild edible mushrooms for food security. Additionally, 10% of the participants consumed wild edible mushrooms twice a week, 4.3% thrice a week, once per week and twice per month. A smaller proportion of the participants, 1.4% consumed wild edible mushrooms three times a day. This disagrees with the findings of Manduna & Vibrans (2018) who reported families consumed wild food plants about twice per week in season. They further reported that the wild-growing food plants were important during the first 3 months of the year (January to March), which also contrary to the reports of interviewees from our study, where participants said they started collecting and consuming the wild edible mushrooms as early as December, 2020.
Figure 2 depicts the frequency of collecting the wild edible mushrooms by the participants. The frequency of collection of wild edible mushrooms varied among the households. However, most households collected the wild edible mushrooms once every day (around 52%), followed by 28.6% collecting every second day, while 15.7% of the participants collected the wild edible mushrooms once a week, a small proportion (4.3%) collected twice in a month. This is related to the report of Boa (2004) who observed the collection of wild edible mushrooms in Malawi where the collection was done only once a day.
Part of the questionnaire collected information on the members of the households in the three villages who usually collected the wild edible mushrooms. Figure 3, shows just few cases (1.4%), fathers do collect the wild edible mushrooms, whereas, mothers, mothers and girl child, and mothers and boy child did the collection of wild edible mushrooms (21.4%, 24.3% and 7.1%, respectively), showing that mothers were better knowledgeable of wild edible mushrooms compared to their counterparts- fathers. About 45.7% of either mothers or fathers accompanied by children collected the wild edible mushrooms. Our findings showing fewer cases of fathers collecting the wild edible mushrooms are similar to Manduna & Vibrans (2018) results on Consumption of wild-growing food plants in the Honde Valley, Zimbabwe. They reported that it was unusual for the men to bring home any collected food plants, except fruit in families with very young children. Boa (2004) reported that women frequently go on collecting trips in many parts of southern Africa and a number of reports confirm the importance of this activity during the three to four month season each year. The results are different from the results obtained by Boa (2004) on wild edible mushroom collectors, in which wild edible mushroom collectors were men in China, while both men and women were involved in the collection of wild edible mushrooms in Mexico. The same author reported that it was unusual for men as collectors, because the collectors in Malawi were mostly women, as the case in Tanzania and Burundi. Mother or father and children collected the wild edible mushrooms (45.7%). Our findings showed that participants limited themselves to only a few wild edible mushrooms species that they were familiar with and were easy to recognize.
The wild edible mushrooms collectors used indigenous knowledge in identifying the edible ones. Figure 4 shows that breaking and observing milk like liquid oozing out, or checking the colour underneath and top of the mushrooms, or points of collection (which included anthills, under trees, on decomposing baobab trees) or used either of the above to identify wild edible mushrooms. About 62.9% of the participants used either of the following to identify wild edible mushrooms: breaking and observing milk like liquid oozing out, check colour underneath and top, Points of collecting (Anthills, under trees, decomposing baobab trees) and Shape, texture and smell. Additionally, 24.3% of the participants used the points of collection such as anthills, under trees, decomposing baobab trees to identify the wild edible mushrooms, 7.1% used shape, texture and smell. A smaller proportion of the participants, 2.9% checked colour underneath and top or breaking and observing milk like liquid oozing out in identifying the wild edible mushrooms. Most of the participants who checked colour underneath and top said this check was common on Nhedzi, Bowa hwepamuuyu, Zhouchuru and Huzutwe, which they said head tip is light brown. Additionally, Zhouchuru and Huzutwe were collected on anthills, whereas Bowa hwepamuuyu collected on dead baobab trees. Zheve is identified by breaking and observing milk like liquid oozing, and only collected experts as it was easily confused by another similar type which is poisonous. Rural people have long associated the appearance of edible fungi with particular trees and have incorporated this in local names. In southern Africa, chimsuku and kamsuku both describe Lactarius spp. that grow under masuku trees (Piearce, 1981). Edible species of Favolus are collected from dead wood inside tropical rain forests, while Termitomyces only grow in association with termites and their nests and are dependent on the organic matter brought by the insects from their feeding on trees. Although Termitomyces are saprobic, they are symbiotic with termites. Twenty edible species of Termitomyces have been recorded from Africa and Asia (Pegler and Vanhaecke, 1994). Among the local people, names of edible mushrooms are based on the substrates on which they grow, their association with insects, and unrelated taxa are given collective names (Apetorgbor et al., 2006). In Malawi, people collect wild edible mushrooms under miombo trees (Boa, 2004). Traditional communities also have better ecological knowledge about local environments Angelsen (2010). Boa (2004) reported that wild mushrooms collectors knew that certain wild mushrooms were found near certain tree species and that each year the same type of wild mushrooms appear in the same places. In this current study, some households collected wild edible mushrooms, for example (Bwabbaya- Bowa bwepamuuyu) on decomposed baobab trees, on anthills (Indyuu- Nzouchuru). Agrocybe aegerita, an edible saprobic species growing physical connection to the roots can be seen, here on a tree stump in Bologna, Italy (Boa, 2004). Lactaron sp. white fluid appears after breaking the gills, whereas, the sac is a distinctive feature of Amanita (Boa, 2004). Some countries have developed the guide for edible mushrooms, for example in Israel the guide is written in Hebrew and Russian (Wasser, 1995), following the arrival of over one million Russians in the 1990s and their strong tradition of collecting wild edible fungi. Mushroom poisoning are rare, are associated with a number of events: young children collecting indiscriminately mushrooms; wrongly identifying a local species that turns out to be poisonous; food shortages and economic hardship force people to hunt for food. Wild edible mushrooms provide a notable contribution to diet in central and southern Africa during the months of the year when the supply of food is often perilously low (Boa, 2004).
Availability and attitudes towards wild edible mushrooms
Table 4 shows the availability and attitudes towards wild edible mushrooms by the participants. The respondents preferred the ones common in the area (75.7%) (n=70) while 24.3% liked the taste of the wild edible mushrooms. They pointed out that the availability of wild edible mushrooms is tremendously diminishing. The availability of wild edible mushrooms has strongly decreased (92.9%) of the respondents (n=70), while 7.1% mentioned a decrease availability of wild edible mushrooms, citing rare existing of some of wild edible mushrooms for example Zhouchuru, Nyabururu and Zheve. Comments, particularly by elders and women, during focus group and individual interviews indicated a trend toward an extinction of certain species, because of prevailing weather patterns; several people mentioned the loss of native woodlands, anthills, indigenous trees, where the wild edible mushrooms are most abundant, may lead to their extinction.
Several studies supporting the extinction of wild food plant sources that are important in the traditional African diet have been documented for more five decades ago. In Zimbabwe, there is evidence that with the expansion of organized agriculture, and the land clearing and deforestation resulting from increasing fuel-wood demands, several species of wild fruit and vegetable plants are rapidly disappearing from the rural dietary (Gomez, 1988). In a survey carried out in Masvingo province (Kaeser-Hancock and Gomez, 1985) it was found that communal farmers recognized the names of certain wild fruit trees but no longer consumed the fruit owing to the disappearance of these species from the natural vegetation. Collection of mushrooms in Zimbabwe (2002) reported that households eat up to 20 kg in a productive year but only 5-10 kg in deforested areas. Similar observation were obtained by Manduna & Vibrans (2018), who reported that the participants in their study only mentioned that some fruits and vegetables had become more difficult to find recently because of the increase in the human population. Apetorgbor et al. (2006) reported that edible mushrooms were collected from forest reserves, secondary forests and fields under fallow, however, with the current rate of bush burning and deforestation, collection of edible mushrooms from the wild is threatened. To matters worse, wild edible plants species are still largely ignored in land use planning and implementation, in economic development, and in biodiversity conservation endeavours (Dessalegn, 2017). Traditional knowledge on wild edible plants is being eroded through acculturation and the loss of plant biodiversity along with indigenous people and their cultural background, promoting research on wild food plants is crucial in order to safeguard this information for future (Dessalegn, 2017).
Table 4: Availability and attitudes towards wild edible mushrooms
Attitudes towards wild edible mushrooms
|
Changes in availability
|
Prefers the ones common in the area
|
75.7
|
Strongly decreased
|
92.9
|
Like the taste
|
24.3
|
Decreased
|
7.1
|
Source: Authors