THE EFFECT OF THE BROWN MARMORATED STINK BUG HALYOMORPHA HALYS (STåL, 1855) ON SATSUMA MANDARIN AND PESTICIDES’ EFFICIENCY AGAINST THIS PEST IN THE CONDITIONS OF ABKHAZIA

Satsuma mandarin (Citrus reticulata subsp. unshiu (Marcow.) D. Rivera & al.) is the main industrial crop in the Republic of Abkhazia. Recently, one of the economically significant pests has become the brown marmorated stink bug Halyomorpha halys (Stål, 1855) (Hemiptera: Pentatomidae). In 2017–2020, the research was carried out at the experimental plot of the Institute of Agriculture of the Academy of Sciences of Abkhazia (Gulrypsh district of the Republic of Abkhazia) in full-grown Satsuma mandarin plantations according to generally accepted methods. A sharp rise in the damage rate of Satsuma mandarin fruits in Abkhazia is observed from late August and lasts until mid-October. In 2017, the loss of marketable yield reached 81.0 %, then there was a trend towards a decrease in damage to H. halys fruits. In 2020, the yield loss from the brown marmorated stink bug was only 58 %. The highest efficiency was shown by the variant with Confidor Extra, WDG – 82.5–92.3 %, the results were slightly lower in the variant with Karate Zeon, MS – 75.4–88.5 %.