The article presents scientific materials about activity of Trybel’ Stanislav Olexandrovych (1935–2020), who is a famous scientist in the field of agricultural entomology, doctor of agricultural sciences, professor. S. O. Trybel’ devoted 55 years to the development of domestic agrarian science. His scientific activity for more than 30 years was associated with the Institute of Plant Protection of the National Academy of Agrarian Sciences of Ukraine. He also worked at the All-Union Research Institute of Sugar Beet and the Ukrainian Research Design and Technology Institute "Agroresursy"

The significant portion of scientific investigations of S. O. Trybel’ was directed to detail studying of features of the development of sugar beet pests with aim of insecticides’ minimal application on industrial technology of crop growing. Great attention is paid to such a dangerous pest as meadow moth Margaritia sticticalis L. A great danger of gray beet weevil Tanymecus pаlliatus F. was noted for sugar beet. Economic thresholds of harmfulness for beet weevils have been established. The effectiveness of trichogram’s (Trichogramma sp.) application against lepidopteran pests, which are a meadow moth, turnip moth and so on, has been proven. The importance of a reliable forecast of the development of pests as element of the system of plant protection is indicated. The opinion is expressed that it is necessary to improve the phytosanitary state of agrocenoses based on the concept of integrated plant protection. S. O. Trybel’ worked on the search for sources of resistance of winter wheat, potatoes, clover to pests. He developed methods of computer simulation of the breeding process of creating resistant varieties and hybrids of winter wheat and potatoes. He proved resistance of potatoes’ varieties to Colorado potato beetle Leptinotarsa decemlineata Say.; the gene of bacterium Bacillus thuringiensis was introduced into genome of them. He studied in detail the features of development and harmfulness of chestnut mining moth Cameraria ohridella Deschka & Dimič and worked out environmentally friendly methods of protecting plantations of chestnut ordinary from her.

S. O. Trybel is the author of about 300 published scientific works, including 16 books, chapters in 10 books, 1 DSTU, 4 patents. He created a scientific school, training 5 doctors and 18 candidates of agricultural sciences.

For outstanding achievements in the field of science S. O. Trybel’ was awarded the Honorable Mention of the National Academy of Agrarian Sciences of Ukraine. He was awarded a state scholarship as an outstanding scientist. He also received the "Golden Fortune" award of the International Academy of Rating Technologies and Sociology – the medal "People's Honor to Ukrainian Scientists 1918-2018"

1. Krut’, M. V. (2021). Do 75-richchia Instytutu zakhystu roslyn NAAN Ukrainy. Entomolohichni shkoly [To the 75th anniversary of the Institute of Plant Protection of the NAAS of Ukraine. Entomological schools]. Ukrainskyi entomolohichnyi zhurnal, no. 1–2, pp. 85–101 [in Ukrainian].
2. Trybel’, S. O. (1981). Pro periodychnist spalakhiv masovoho rozmnozhennia luchnoho metelyka [On the periodicity of outbreaks of mass reproduction of the meadow butterfly]. Zakhyst roslyn, issue 28, pp. 3–10 [in Ukrainian].
3. Trybel’, S. O., & Stryhun, O. O. (2003). Siryi dovhonosyk [Gray beet weevil]. Zakhyst roslyn, no. 8, pp. 13–14 [in Ukrainian].
4. Tribel', S. A. (1981). Trikhogramma protiv cheshuekrylykh [Trichogramma against Lepidoptera]. Sakharnaya svekla, no. 6, pp. 37–38 [in Russian].
5. Tribel', S. A. (1998). Metody prognoza i puti ikh sovershenstvovaniya. [Forecast methods and ways to improve them]. Zashchita i karantin rasteniy, no. 10, pp. 34–35 [in Russian].
6. Tribel', S. A. (1998). Problemy fitosanitarii na Ukraine [Phytosanitary problems in Ukraine]. Zashchita i karantin rasteniy, no. 5, pp. 13–14 [in Russian].
7. Trybel’, S. O. (2000). Zakhyst roslyn: sohodni i zavtra [Plant protection: today and tomorrow]. Zakhyst roslyn, no. 2, pp. 2–4 [in Ukrainian].
8. Lisovyi, M. P., & Trybel, S. O. (1998). Vykorystannia stiikykh sortiv i hibrydiv v intehrovanykh systemakh zakhystu roslyn [Use of resistant varieties and hybrids in integrated plant protection systems]. Visnyk ahrarnoi nauky, no. 11, pp. 17–21 [in Ukrainian].
9. Trybel’, S. O., Hetman, M. V., Hrykun, O. A., Romashko, V. M., Prykhodko O. V., & Fedorenko, A. V. (2006). Stiiki sorty – radykalne vyrishennia problemy zakhystu roslyn [Resistant varieties are a radical solution to the problem of plant protection]. Zakhyst i karantyn roslyn, issue 52, pp. 71–89 [in Ukrainian].
10. Trybel’, S. O., Stryhun, O. O., Hetman, M. V., & Topchii, T. V. (2010). Stratehiia vykorystannia stiikykh sortiv ozymoi miakoi pshenytsi v zonalnykh intehrovanykh systemakh zakhystu vid shkidnykiv [The strategy of using resistant varieties of winter soft wheat in zonal integrated systems of protection against pests].
11. Karantyn i zakhyst roslyn, no. 11, pp. 2–9 [in Ukrainian].
12. Trybel’, S. O. (2001). Henetychno modyfikovani roslyny [Genetically modified plants]. Zakhyst roslyn, no. 3, pp. 1–2 [in Ukrainian].
13. Tribel', S. A., Korol', T. S., & Novosel'skaya, T. G. (2001). S pomoshch'yu gennoy inzhenerii [Through genetic engineering]. Zashchita i karantin rasteniy, no. 4, pp. 16–17 [in Russian].
14. Trybel’, S. O., & Hamanova, O. M. (2008). Kashtanova minuiucha mil. Efektyvnist toksykatsii krony derev insektytsydamy proty nebezpechnoho fitofaha [Horse chestnut leaf miner. Effectiveness of poisoning tree crowns with insecticides against a dangerous phytophagous plant]. Karantyn i zakhyst roslyn, no. 1, pp. 5–10 [in Ukrainian].