Efficient protection of potato from diseases of various etiology under conditions of the Mosraw region

Late and early blights of potato caused by Phytophthora infestans and Alternaria solani and Alternaria alternata belong to the most harmful and common potato diseases in Russia and other parts of the world. Yield losses caused by these diseases can be reduced using integrated protection system, which includes the use of healthy seed material, disease-resistant cultivars, proper agrotechnic approaches, and also modern chemical fungicides. Like other countries, Russia often suffers from severe late and early blight epiphytoties; under such conditions, only chemical treatments may provide a reliable level of protection against the diseases. The purpose of our two-year studies was evaluation of the efficiency of different schemes of potato protection against the late and early blights under conditions of the Moscow region. The first scheme included plant treatment with the following fungicides: 2х Orvego (a.s. ametoctradin + dimetomorf, 0.8 L/ha); 1х Infinito + Signum (a.s. fluopicolide and propamocarb hydrochloride + boskalid +piroklastrobin, 1.6 L/ha + 0.3 L/ha); 1 х Orvego (a.s. ametoctradin + dimetomorf, 0.8 L/ha); 1х Poliram + Signum (a.s. metiram + boskalid +piroklastrobin, 2.5 kg/ha + 0.3 L/ha); and 1х Poliram (a.s. metiram 2.5 kg/ha). The second scheme included the treatment with the following fungicides: 1 х Revus (a.s. mandipropamid, 0.6 L/ha); 1х Ridomil Gold MC (a.s. mancoceb + mephenoxam, 2.5 kg/ha); 1х Infinito + Scor (a.s. fluopicolide and propamocarb hydrochloride + difenoconazol, 1.6 L/ha + 0.5 L/ha); 1 х Revus (a.s. mandipropamid, 0.6 L/ha); 1х Shirlan + Scor (a.s. fluazinam, + difenoconazol, 0.4 L/ha + 0.5 L/ha); 1х Shirlan (a.s fluazinam, 0.4 L/ha). The third scheme included the treatment with the following fungicides: (1 х Revus (a.s. mandipropamid, 0.6 L/ha); 2х Infinito (a.s. fluopicolide and propamocarb hydrochloride 1.6 L/ha); 1х Revus (a.s. mandipropamid, 0.6 L/ha); 2х Shirlan (a.s fluazinam, 0.4 L/ha). The fourth variant included untreated plants (control). Under conditions of late blight epiphytoty and moderate development of the early blight, all tested schemes showed high efficiency in relation to the reduction of the late blight harmfulness that provided a prolonged vegetation period and, therefore, higher potato yield and improved quality and marketability of potatoes. At the same time, the best yield and quality of potato was observed for the variants 1 and 2 characterized by a complex suppression of both diseases during plant vegetation period.

альтернариоз, фитофтороз, защита картофеля, фунгицид Орвего, Ревус, Инфинито, Ридомил Голд МЦ, Скор, Сигнум, Ширлан, Полирам, early blight, late blight, potato protection, fungicides, Orvego, Revus, Infinito, Ridomil Gold MC, Scor, Signum, Shirlan, Poliram