Influence of wetting agents on sandy soils moisture and dry spots spreading on sports lawns

The aim of research is to study the effect of wetting agents on the physiological state of the sprouting bent (Agrostis stolonifera L.) of the PLS variety under the conditions of the Moscow Region. The study was carried out in the climatic conditions of the Central Region of the Russian Federation, on the territory of the Skolkovo Golf Club (the Moscow Region). The experiment used a modified method for determining dry spots on the lawn; modified method for determining the moisture content of sandy soil. Aquatrols Revolution turned out to be the most effective preparation for combating dry spots on the sprouting bent: the area of lawn damage from dry spots at an application rate of 20 l/ha decreased on average by 18 %, at a rate of 10 l/ha - by 26 %. The preparations Aquatrols Dispatch performed well at (application rate 5 l/ha) and Liven-SM (application rate 20 l/ha). The percentage of dry spots decreased: Liven-SM (20 l/ha) - on average by 19.5 %; Dispatch (5 l/ha) - by 17 %. Kick and Aqueduct proved to be the worst: the area affected by dry spots on the lawn increased by 5 %. According to the results of studying soil moisture, the following preparations showed their effectiveness: Revolution - regardless of the concentration of the working solution, the moisture content increased on average by 7.6 %; Liven-SM (20 l/ha) - humidity increased by 7.7 %; Dispatch (5 l/ha) - humidity increased by 7.3 % (the plot had the lowest humidity throughout the experiment, the percentage of dry spots decreased by 17 %). Some preparations contributed to an increase in the number of dry spots on the investigated plots: Compo Kick (2.5 l/ha) - with an increase in humidity by an average of 7 %, the percentage of dry spots also increased by 5 %; Aqueduct (1.25 kg/100 m2) - with an increase in soil moisture by 8.5 %, the percentage of dry spots increased by 5 %.