young orchards [2; 3]. Due to its harmfulness, this pathogen is classified by the European and Mediterranean Plant-protection Organization (EPPO) as an A2 quarantine pest [4]. Xac was originally first described on _C. maxima_ but now is classified as a hazelnut pathogen that has spread worldwide [5; 6]. Xac is able to provoke symptoms on almost every organ of the plant; however, the most susceptible ones are buds, twigs, leaves and (sometimes) fruits. Symptoms appear as cankers, blackening, and oily necrosis and can lead the plant to death in the most severe cases. Xac in field can be spread by rain or infected tools among plants; it penetrates the host through the stomata of leaves, buds and new shoots [7; 8]. Infected buds represent the major source of inoculum during spring; the microorganism is able to overwinter only on infected plants, not in soil, although its ability of surviving on fallen leaves for several months has been reported. The main risks are for seedlings and young plants, while adult ones rarely are killed by Xac, even though the dieback of new shoots and the cankers can heavily damage the production [6; 9]. The counteracting and spread of control measurements of hazelnut bacterial blight rely on prevention: the use of healthy and disease-free plant material in nurseries is the most relevant strategy, while in-field disinfecting pruning tools and destroying symptomatic branches are equally important as using cupric salts to prevent infections [10; 11]. Copper and copper-based products, as for other bacterial plant diseases, nowadays still play an important role in crop-protection strategies, but recently copper was enlisted by EU as a candidate for substitution [12; 13]. Due to the environmental risks associated with its use in field, European Commission has recently limited the amount of usable copper to 4 kg per hectare per year (maximum 28 kg per hectare in seven years) (Executive Regulation 2018/1981 of 13 December 2018) [14; 15]. Finding alternative compounds to copper and its derivatives is an increasingly urgent priority [16; 17]. The implementation of sustainable approaches in the plant-protection sector has in fact become a major research topic over the last years. Several aspects of agriculture system can become more innovative and efficient by relying, for example, on nanotechnology tools [18; 19]. Indeed, nanotechnology combined with circular economy can represent a green alternative to conventional plant-protection strategies by ensuring food security in a sustainable way [20; 21]. This novel approach allows one to obtain highly technological nanometric materials, such as nanospesticides, starting from agro-industrial wastes [22; 23; 24]. The residues of a supply chain may become part of the strategy for the sustainable growth and protection of the supply chain itself. The combination of bio-based additives, as active ingredients, and functional nanostructures, as carriers, is one of the most promising tools [25]. Nanoscale structures such as organic nanomaterials can be utilized in the smart delivery of plant-protection inputs, for the encapsulation and entrapment of agrochemicals such as fertilizers, pesticides, herbicides, plant growth regulators, and other active substances, allowing for the slow uptake of active ingredients and reducing the amount of agrochemical applications by minimizing the input and waste [26; 27]. Lignocellulosic biomass can represent an importance source of organic nano-compounds [28; 29]. Between the different types, the lignocellulosic biomass counts as the most abundant group representing almost 70% of the total plant biomass. Lignocellulosic biomass can originate from diverse sources such as agricultural and forestry residues, municipal wastes and several crops [30]. Hazelnut is a crop of economic importance for the Mediterranean region. During the hazelnut supply chain, huge amounts of lignocellulosic biomasses come from pruning residues and from nut-processing factories (shelling).