ECONOMIC EFFECTIVENESS OF THE APPLICATION OF THE BIOLOGICAL METHOD OF PROTECTING POTATOES AGAINST THE COLORADO BEETLE AND LATE BLIGHT

Abstract

The economic efficiency of the use of biological protection systems against the Colorado potato beetle and late blight during the cultivation of potatoes in 2017–2019 in the conditions of the Western Forest Steppe of Ukraine was studied. Research has established that the largest conditional net income from the applied measures in the amount of UAH 11,987.8/ha was obtained with the use of biological protection system No. 1, which was based on the application of the preparations Entocid-K, Aktarofit, Fitodoktor List, Urozhai Ovochevi, AdyuMax, Trichodermin and Rhyzostim. The payback threshold for this system was 1.34 t/ha. The highest level of profitability of protective measures was obtained by using biological protection system No. 2, which was based on the three-time application of the preparation Planryz, v.s. in a mixture with dihydropyrimidine derivatives (0.5% solution of xemidon + 2 ml DMSO) – 514.8%. The payback threshold for this protection system showed that to cover the costs of protective measures, an increase in yield of 0.65 t/ha is required, while the yield was 4.8 t/ha more than in the control. The lowest indicators of income and profitability among the studied systems were obtained for the use of a chemical protection system: UAH 2088.00/ha and 53.4%, respectively. This is due to the low productivity (11.2 t/ha) and the high cost of the protection system (3660.00 UAH/ha). The payback threshold for this system was 1.3 t/ha. When using the biological protection system No. 3 (Planriz, v.s. in a mixture with dihydropyrimidine derivatives ((arim) 1 – 0.5% s-n + 2 ml DMSO + 12.7 ml 1% s-n KOH)) was an income of UAH 6,098.00/ha and a profitability of 320.6% were obtained. The payback threshold for this protection system was 0.63 t/ha. For the application of the biological system of protection of potatoes No. 4 (Planryz, v.s. with dihydropyrimidine derivatives ((arim) 4 – 0.05% s-n + 2 ml DMSO)) conditional net income from the applied measures amounted to UAH 4148.00/ ha at a profitability level of 224.0%. The payback threshold for this protection system was 0.62 t/ha.