Over the last decade, the urgency to find alternative and sustainable protein sources has prompted an exponential increase in the interest in insects as a human food source. Edible insects contribute suitable amounts of energy and protein, fatty acids, and micronutrients to the human diet. Nutritional values of insects can be manipulated to meet specific needs. Edible insects in food-insecure countries can contribute to improving diets and preventing undernutrition. Bioactive compounds in insects may reduce health risks. Food safety risks are low and mainly relate to those of allergenicity. Strategies to overcome barriers to the consumption of insect products include emphasizing their sustainability, increasing their tastiness, and developing the ability to disguise insects in familiar products. A new sector of insects as food and feed is emerging. Major challenges include legislation, lowering prices by automation and cheap substrates, developing insect products that appeal to consumers, and exploring the health benefits.

A growing number of studies underline consumers’ concerns about the importance of animal welfare as a general concept for consumers’ purchase decisions. In particular, consumers perceive animal husbandry to be one of the most important aspects of animal welfare. Since intensive livestock production is criticized across society, the acceptance of current intensive production systems of edible insects is an issue of investigation. Criteria of insect welfare might differ from vertebrate welfare. One might argue that it is difficult to define standards for insect welfare due to their large diversity in living environments and feed requirements. In addition, it is debated whether insects are conscious and suffer from pain. It has been demanded to rear insects preferably under natural living conditions and some researchers proposed to consider them as sentient beings. Basic welfare and ethical aspects of insects as food and feed include species-specific mass rearing conditions and euthanasia, i.e., killing procedures. Consumers’ opinions and concerns regarding this issue have hardly been considered so far. In this paper, the animal welfare of prevalent livestock is defined and outlined, and relevant criteria are transferred to insect welfare. Different ways consumers might arrive at an animal welfare understanding are discussed, along with an overview of the few consumer studies on insect welfare. Furthermore, we consider how insects are presented in the public discourse and infer how this might be relevant to consumers’ perceptions of insect welfare.

A transformation of current livestock production towards a more sustainable operation is crucial to face nutritional and environmental challenges. There is an urgent demand for more sustainable high-quality feed sources to reduce environmental costs. Insects pose a potential alternative since they can be reared sustainably on food and feed residues. Know-how in mass rearing already exists for insect species used in biological pest control, such as the African cotton leafworm Spodoptera littoralis and the peach fruit fly Bactrocera zonata. The impact of a replacement of 50% of soybean meal by S. littoralis and B. zonata meal, respectively, on seven-days-old Japanese quail chicks was investigated in feeding trials. Concomitantly, the chemical compositions of the two insect meals and soybean meal were determined and compared. It was observed that the insect meals had higher protein and fat contents, lower carbohydrate contents and contained more saturated fatty acids than soybean meal. They also had higher methionine, and S. littoralis had a higher lysine content. Feeding trials resulted in improved growth, feed performance parameters, carcass characteristics, and biochemical indices for both insect meals. Consequently, both insect meals represent a promising alternative to soy in the feed of Japanese quail chicks.

Radio frequency plasma (RFP) could provide reliable, compact, cost-effective irradiation applications against insect pests of stored food and feed products. Sensitivity of red flour beetleTribolium castaneumto RFP has been investigated using an irradiation applicator system with the two types of inert gases, argon (Ar) and helium (He), at 100 W for five exposure time levels of 0, 20, 40, 60 and 90 s, respectively. We demonstrated that He RFP was more efficient againstT. castaneumthan Ar RFP. In addition, a positive correlation was observed between mortality percentages of treated insect stages and exposure times for both He and Ar RFP. The adult stage showed the highest tolerance to RFP irradiation followed by larvae and pupae; however, it was more susceptible than larvae within 24 h after He RFP treatments. The optimum exposure time was 90 s with He RFP, where a full mortality at all tested stages was accomplished, while mortalities of 71.4, 65.3 and 36.7% were recorded for pupae, larvae and adult stage, respectively, after an Ar RFP treatment of 90 s. In case of treated adults, the reproduction rate was higher than treated larvae and pupae. Our findings indicated that He RFP was an effective method for inhibitingT. castaneumdevelopment and impacting the insect life cycle and could be considered a promising tool for pest control of stored food.

Children in tropical countries have always eaten insects but are now often discouraged from doing so. Recently, the idea of the consumption of insects has been re-introduced as an answer to malnutrition since edible insects are a potential alternative and sustainable protein and food source. However, in countries where the consumption of insects is not traditional, there is a lack of acceptance as well as skills when it comes to preparing a meal with insects. Examples of experiments from different parts of the world are given, where children in schools are educated about the nutritional and environmental benefits of eating insects. In general, after the experience, children are more positive about the idea of eating insects. It is stipulated that insects as food could be a very good entry point for the discussion about our future food supply. Furthermore, with the increasing commercial production of edible insects, there is an increasing demand for skilled workers in the insect production industry. Essential to the promotion of insect consumption are the development of curricula and educational materials for vocational education, training of insect farmers, and general education in primary and secondary schools as well as tertiary education.

Insects and their derivatives are increasingly recognised as a (more) sustainable and circular protein source for feed and food. The European insect industry is growing, but upscaling remains a challenge due to multiple uncertainties. This study analysed the robustness of three different business models for insect production for feed and food in six future scenarios. Business models and scenarios were identified through literature review and refined through expert elicitation (n = 5). The three business models comprised: (1) full-liner black soldier fly production for pet food , (2) decentralised black soldier fly production for aquafeed , and (3) mealworm processing cooperative for food . The six scenarios addressed uncertainties around the use of side streams, insect welfare, energy, and sustainability. We used the Business Model Stress Test in four focus groups with experts (n = 23) from six European countries. Heat maps for three distinct business models were presented, detailing the impacts of scenarios on business model components. Experts regarded full-liner black soldier fly production for pet food and mealworm processing cooperative for food as more robust than decentralised black soldier fly production for aquafeed . These differences were mainly related to the customer segments , value proposition , revenue structure , and cost structure . In full-liner black soldier fly production for pet food , stringent regulations were expected to have no negative impact on business model components, in contrast to liberal regulations with anticipated adverse effects. Examination of regulatory uncertainty indicated strict legislation’s advantageous expected impact on consumer trust in the pet food and food market. High energy prices were anticipated as a major challenge across all business models, while improved sustainability compliance was viewed positively. The classification in relatively more or less robust business models serves as a guide for business and policy in further developing the insect sector for feed and food in Europe.