This invention pertains to a composition, which is a natural and organic pesticide, specifically with fungicidal and bactericidal action against pathogenic microorganisms in agricultural products such as rootcrops, fruits and vegetables. Examples of such disease-causing microorganisms are Mycosphaerella fijensis causing black Sigatoka disease in Cavendish (banana), Ralstonia solanacearum causing Moko disease in Cavendish (banana), Colletotrichum gloespoiroides and Botryodiplodia theobromae causing anthracnose in crops and fruits, tomato yellow leaf curl virus (TYLCV) in tomatoes, Lasiodiplodia theobromae causing soft rot or fruit rot in crops and fruits, Fusarium oxysporum causing Panama wilt in fruits and crops, and many others. The composition, which is an extract of a fermented concoction of tropical plants, carbon source, protein (nitrogen) source, and a carrier agent, is mainly composed of alpha-hydroxy acids (AHAs) as the active ingredients, with lactic acid as the most dominant AHA, and other natural nutrients, all of which may help strengthen the plants immune system to fight pathogenic diseases. Since all the major constituents of the composition are generally regarded as safe, this natural pesticide is found to be non-toxic and safe to humans and animals, and environmentally benign.La présente invention concerne une composition formant un pesticide naturel et biologique. Ladite composition est, plus précisément, dotée dune action fongicide et bactéricide contre des microorganismes pathogènes des produits agricoles comme les racines alimentaires, les fruits et les légumes. Comme exemples de ces microorganismes à lorigine de maladies, on peut citer Mycosphaerella fijensis qui est à lorigine de la cercosporiose noire affectant les bananes Cavendish, Ralstonia solanacearum à lorigine de la maladie de Moko affectant également les bananes Cavendish, Colletotrichum gloespoiroides et Botryodiplodia theobromae à lorigine de lanthracnose affectant divers fruits et c
