Siliplant and pharmaiod for control of tomato gray mold

Gray mold (Botrytis cinerea Pers.) is a dangerous disease of protected ground tomatoes that causes significant crop losses. The disease often develops against the background of a latent viral infection, which reduces the resistance of plants to pathogens. The article presents the results of testing Siliplant, silicon-containing fertilizer, against tomato gray mold in combination with the antiviral drug Farmaiod. The experiments were performed in a film greenhouse in the Moscow region on a natural infectious background. The experiments used a hybrid of tomato F 1, named Islet. The plants were treated by spraying when the first symptoms of gray mold appeared. The experiment scheme included Siliplant, 1.0 L/ha; and Siliplant, 1.0 L/ha in combination with Pharmaiod (0.02%), fungicide Switch, 1L/ha – standard, and control variant – without treatment. The biological efficiency of Siliplant at a flow rate of 1.0 L/ha was 62.1%. The tank mixture of Siliplant and Pharmaiod (0.02%) increases the biological efficiency of treatments to 69.2%, but is inferior to the reference fungicide Switch (75.2%). Under the influence of Siliplant treatments, the tomato yield increased by 14.9–17.6% compared to the control. The most effective protection was provided by treatment of plants with Siliplant at a rate of 1.0 L/ha with the addition of Pharmaiod (0.02%). The obtained results showed that Siliplant in combination with Pharmaiod can be used as an element of a complex system for protecting tomatoes from gray mold.