Chestnut tannin phytocomplex (CTP), hot water-extracted from untreated wood and membrane-concentrated to 17% DM (13% tannins) (patented process of Nuova Rivart, Gruppo Saviola, Italy), was studied and patented as a natural soil acidifier, salinity control agent, phosphate solubilizer and iron complexing agent, with a positive starter effect on the treated plants. During these studies, CTP unexpectedly gave also a consistent nematostat effect on carrot and other veg crops, comparable to ordinary agrochemicals. As there are very few options for chemical control of nematodes (especially Meloidogyne spp.) in tobacco crop, CTP was investigated as a natural alternative for its nemastat activity. Previous field tests on tobacco, carried out on CTP acidified water as a carrier of azadirachtine (studied as a potential nemastat), had indicated a significant increased nematode control, as compared to citric acid acidified water. After positive lab, greenhouse and field tests, mainly on veg crops, some preliminary field experiments were carried out in Northern and Central Italy also on Virginia Bright tobacco in 2008-2009. When conditions were prone to nematode attacks, results indicated that CTP, applied as a double treatment (250 kg/ha pre-plant + 250-500 kg/ha in microirrigation, liquid formulation 13% tannins), determines a good control at competitive costs (on average, 2/3 those of ordinary agrochemicals), and is also an interesting natural alternative when pesticide residue-free ag products are sought. At these rates, independently of the nemastat effect, CTP acts favorably on plant early growth, reducing time to flowering. Presently, CTP is used as a straight product, and in formulations with nitrogen and iron.