Improvement of the Technology of Aapplication of Biological Preparations for Plant Protection

Abstract

The issues of improving the quality of application of fungal and bacterial biological products when applying the flow rates of working fluid up to 20 l/ha are considered. Along with the traditional methodology for assessing the quality of applying the working fluid of biological products to the treated surface, a new method for evaluating the effectiveness of applying biological products was also used, which consisted in selecting a certain area of the potato leaf surface by plant tiers 1 day after processing to determine the viability of fungal and bacterial preparations with low-volume (LV) and ultra-low-volume (ULV) technologies spraying. It is shown that when applying the technology of spraying up to 10 l/ha, despite the high coating density, the cells of microorganisms fall on the leaf surface with an insufficient amount of liquid for their active reproduction on the treated surface. In addition, at low humidity, due to the rapid evaporation of droplets from the surface of the treated leaves, microorganisms do not multiply and are carried away by the wind when drying. The conducted research tests of the use of the mushroom biological preparation Trichocin at a consumption rate of 20 l/ha on test objects (potato plants of the Galla and Riviera varieties) using especially pure glycerin and the moisture-retaining food additive sorbitol as antiparators showed that their use ensured the viability of the cells of the biological product and the high rate of their reproduction on the treated surface due to moisture retention.