1. A composition for preventing spoilage yeasts and molds, containing antifungal agents together with at least one compound of the group (a) and at least one compound of the group (b) :( a) organic acids selected from the group consisting of caprylic acid, cinnamic acid, propionic acid, butyric acid, lactic acid, tartaric acid and fumaric acid and salts thereof (b) vegetable or fruit extracts, vegetable oil phases or fruit extracts, and monoveschestva derived from such extracts or oily f az.2. A composition according to claim 1, wherein the plant or fruit extract group (b) is selected from cinnamon extract, in particular, cinnamon bark or leaves of the cinnamon tree, thyme extract, oregano extract, marjoram extract, lemongrass extract, cassia extract, geranium extract, extract grapefruit seed, cranberry extract and extract cherniki.3. A composition according to claim 1, wherein the oil phase is the group (b) is selected from the group consisting of cinnamon oil, lemongrass oil, thyme oil, lemon myrtle oil, oregano oil, tea tree oil and gvozdiki.4 oil. A composition according to claim 1, wherein monoveschestvo group (b) is selected from the group consisting of cinnamic aldehyde, vanillin and their functional equivalents proizvodnyh.5. A composition according to any one of the preceding claims, wherein the organic acid groups (a) is caprylic acid, cinnamic acid, propionic acid or one or more of their sol.6. A composition according to claim 1, wherein the component (s) of the group (a) and the component (s) of the group (b) are present in a weight ratio ranging from 20:80 to 98.5: 1.5, preferably between 70:30 to 98.5: 1,5.7. The use of composite1. Композиция для предотвращения порчи плесенями и дрожжами, содержащая наряду с антигрибковыми агентами по меньшей мере одно соединение группы (a) и по меньшей мере одно соединение группы (b):(a) органические кислоты, выбранные из группы, состоящей из каприловой кислоты, коричной кислоты, пропионовой кислоты, масляной кислоты,
