The article presents new data on the composition, abundance, and distribution of harmful malacofauna of apple orchards and Sivers apple tree growing areas in the southeast of Kazakhstan. In total, 11 harmful species of mollusks belonging to 5 genera from 4 families of the Stylommatophora order of the Gastropoda class were noted. Most of them (8 species) belong to the families Camaenidae and Agriolimacidae (4 species in each family). The remaining 2 species belong to the Succineidae family and 1 species belongs to the Geomitridae. 4 species - Fruticicola almaatini (Skvortzov, 1940), Deroceras reticulatum (O. F. Müller, 1774), Novisuccinea martensiana Nevill, 1878 and Oxyloma elegans (Risso, 1826) - were not previously noted as organisms that harm the cultivated apple tree and the Sivers apple tree. The most numerous, harmful and widespread are the garden snail Fruticicola lantzi (Lindholm, 1927) and the reticulated slug D. reticulatum. Local damage during mass reproduction can be caused by the snail F. almaatini, the slender amber O. In addition to the above-mentioned gastropods, the following species of mollusks have been observed in the growing areas of cultivated apple and Sivers apple trees: Turanena tenuispira Schileyko, 1984, Pseudonapaeus entodon (E.v. Martens, 1882) (Enidae), Punctum pygmaeum (Draparnaud, 1801) (Punctidae), Zonitoides nitidus (müller, 1774) (Gastrodontidae), Macrochlamys lessini Westerlund, 1902, M. turanica Martens, 1874 (Ariophantidae). Their number is very low, and the economic significance for the cultivated apple and Sivers apple trees is unknown and requires clarification.

Nowadays, 81 species and 56 genera of arachnids belonging to 4 orders (Pseudoscorpionida, Trombidiformes, Opiliones and Aranei) and 19 families have been recorded in apple orchards of southeastern Kazakhstan. The order of spiders (Aranei) is dominant in diversity – 16 families, 54 genera and 73 species, the remaining orders include one family and 1-2 genera and species. According to the number of genera and species, the Araneidae family is dominant – 11 species and 9 genera. It is followed by the families Thomisidae (9 genera and 10 species), Salticidae (8 genera and 9 species), Lycosidae (5 genera and 9 species), Philodromidae (4 genera and 9 species), Theridiidae (3 genera and 5 species) and Gnaphosidae (4 genera and 4 species). Other families are represented by 1-2 genera and species. In general, the fauna of arachnid apple plantations, in which chemical pesticide treatments are used, is much more depleted (by 2 or more times) compared to gardens without such treatments and natural biotopes. Data on the consumption of pest caterpillars by different types of spiders in laboratory maintenance are given. Amaurobius erberi (Keyserling, 1863) ate up to 10 caterpillars of the codling moth Cydia pomonella (Linnaeus, 1758) or up to 5 caterpillars of the clouded drab Orthosia incerta (Hufnagel, 1766) per day. Steatoda paykulliana (Walckenaer, 1806) destroyed an average of 5 caterpillars of the codling moth or 3 caterpillars of the clouded drab per day. Smaller species, such as Diaea suspiciosa O.P.-Cambridge, 1885, Xysticus pseudocristatus Azarkina & Logunov, 2001 and Evarcha arcuata (Clerck, 1758), ate 2-3 caterpillars per day. For the first time in the apple orchard, the spider Olios sericeus (Kroneberg, 1875) was recorded, in Kazakhstan this species was previously noted as synanthropic.