Formulation of vegetable soup powder from Clerodendrum volubile enriched with Macrotermes bellicosus (termite) flour

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ORIGINAL RESEARCH ARTICLE

Formulation of vegetable soup powder from Clerodendrum volubile enriched with Macrotermes bellicosus (termite) flour Adedayo Olubunmi Adeboye 1,2

&

Beatrice Mofoluwaso Fasogbon 3

&

Kehinde Adegbuyi 2

Received: 30 April 2020 / Accepted: 23 October 2020 # African Association of Insect Scientists 2020

Abstract Consumption of edible insects as an alternative source of protein is being restricted by the perceived feeling of disgust amongst many people. This study was carried out to introduce the consumption of insects in a non-traditional form by producing a readyto-cook soup powder from Clerodendrum volubile (C. volubile) and enriching it with Macrotermes bellicosus (Termites) at various ratios (with a proportion of C. volubile powder ranging from 80 to 50%, termite powder from 20% - 10% and spices from 15 to 5%) and to evaluate the nutritional, functional and sensory properties of the resulting soup powders. One hundred percent C. volubile powder was used as control and compared with the termite-vegetable blends. The protein content of the blends ranged from 26.53 ± 0.17% to 29.94 ± 0.18% and was higher than the control (15.02%). Moisture content ranged from 4.08 ± 0.02% to 6.09 ± 0.00% while fat ranged from 10.19% to 16.84%. The carbohydrate content (36.84%- 42.86%) decreased as the level of enrichment increased and were lower compared to the control (54.79%). The enriched vegetable soup was quite acceptable as there was no significant difference in the taste, texture, mouthfeel, consistency and appearance amongst the formulated blends. Enrichment with 10% termites gave a soup that had the highest overall acceptability. Keywords Entomophagy . Soup powder . Vegetable . Enrichment . Clerodendrum volubile

Introduction Clerodendrum volubile is an understudied indigenous plant that belongs to the family Lamiaceae (Verbenaceae) and it is one of the widely distributed vegetables in the warm temperate and tropical regions of the world. The plant is popularly known as “Marugbo” or “Eweta” among the Ikale, Ilaje and Apoi people found in Southern-senatorial district of Ondo State, South-West Nigeria. “Obnettete”, as the plant is known among the Itsekiri and Urhobo tribes in Niger-Delta, is a green climbing shrub reported to have a height of 3 m and possesses numerous flowers (Erukainure et al. 2011). The leaves of

* Adedayo Olubunmi Adeboye [email protected] 1

Department of Food Science and Technology, Osun State University, Osogbo, Nigeria

2

Department of Food Science and Technology, Wesley University, Ondo, Nigeria

3

Department of Food Technology, Federal Institute of Industrial Research, Oshodi, Nigeria

C. volubile have great nutritional value as well as herbal and medicinal value as it has been reported to be rich in iron and zinc; elements which are important in many enzymes for their functions and maintenance of fresh skin as well as phenolic compounds and other phytochemicals (Adefegha and Oboh, 2013). When consumed, the leaves are often noted for stimulating the lost