An alternative to the use of chemical fungicides is to enhance the defensive response of plants by\nappropriate stimulation, a phenomenon known as induction of resistance. The aim of this study\nwas to determine the changes of endogen levels of salicylic acid (SA) and jasmonic acid (JA) in potato\nplants as response to foliar application of biotic and abiotic inductors. Treatments T1 = Best\nUltra F (Bacillus spp. 108 cfu/mL and Pseudomonas fluorescens 108 cfu/mL) 0.5%, T2 = FullKover\nHF (microbial jasmonic acid 1500 ppm) 0.2%, T3 = T1 0.5% + T2 0.1%, T4 = Milor�® (Chlorothalonil\n+ Metalaxyl) 0.5% and T5 = control (water) were applied in potato plants. The application of\nbiotic and abiotic inductors improved the SA and JA production in potato plants. The production of\nsalicylic acid in potato plants was observed by application of Bacillus spp. and Pseudomonas fluorescens\n(T1) and fungicide Milor�® (T4). The application of T1 Best Ultra F, T2 FullKover HF (microbial\nJA), T3 (T1 + T2) and T4 Milor�® improved the JA production in potato plants.
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