Pathocomplex of Soil Micromycetes Associated with Root and Foot Rots of Strawberry in Some Regions of Russia

S. E. Golovin¹, A. P. Glinushkin², I. A. Zerkalov³, O. O. Beloshapkina⁴, M. B. Kopina^5
1All-Russian Breeding and Technological Institute of Horticulture and Nursery-Keeping, ul. Zagor’evskaya, 4, Moskva, 115598, Russian Federation
²All-Russian Research Institute of Phytopathology, ul. Institut, vl. 5, r.p. Bol’shie Vyazemy, Odintsovskii r-n, Moskovskaya obl.,143050, Russian Federation
³Orenburg State Agrarian University, ul. Chelyuskintsev, 18, Orenburg, 460014, Russian Federation
⁴Russian State Agrarian University - Moscow Timiryazev Agricultural Academy, ul. Timiryazevskaya, 49, Moskva, 127550, Russian Federation
⁵All-Russian Center of Plant Quarantine, ul. Pogranichnaya, 32, pos. Bykovo, Ramenskii r-n, Moskovskaya obl., 140150, Russian Federation

Abstract. The studies were aimed at clarifying the composition of micromycetes associated with root and foot rots of strawberry, as well as the identification of species succession in pathological processes with the analysis of the environmental factors contributing to the development of the diseases. Phytosanitary surveys of plantations, as well as the selection of plant and soil samples, were carried out in the Moscow, Tula, Bryansk, Voronezh and Orenburg regions, in the Krasnodar Krai and in the Chechen Republic in 2006–2018. The isolates of fungi and pseudofungi were identified on the basis of microscopy and morphometry using reference guides. The refining diagnostics of Phytophthora cactorum, P. nicotianae and Colletotrichum acutatum species was carried out by the method of polymerase chain reaction. Strawberry root rot was noted in all regions. Their most intensive development was observed in ground greenhouses, when the culture was grown in the open ground with mulching by black film in 3-year-old and older plantings, as well as in the southern regions (in the Krasnodar Krai and the Chechen Republic). At the same time, in addition to direct damage to the root system, symptoms were recorded on the above-ground parts of the plants. Most root and foot rots had a complex etiology. The dominant agent (prevalence of more than 60%) in the Moscow region was oomycete P. cactorum; besides it we found C. destructans, Rh. solani, P. nicotianae, and Pythium spp. In three regions (Moscow and Orenburg regions and the Chechen Republic), Rh. solani, C. destructans and Fusarium spp fungi were the most frequently included in micromycete pathocomplexes, associated with black root rot. Rare species of Acremonium, Penicillium, Helicosporium, Mucor, Acremoniella (Harzia), Chalara, Arthrobotrys, and Monochaetia genera were also present in the micromycete complexes in different regions.

Keywords: strawberries; Fragaria; pathocomplex; micromycetes; root and foot rots; monitoring.

Author Details: S. E. Golovin, D. Sc. (Biol.), leading research fellow; A. P. Glinushkin, D. Sc. (Agr.), head of division (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); I. A. Zerkalov, post graduate student; O. O. Beloshapkina, D. Sc. (Agr.), prof.; M. B. Kopina, Cand. Sc. (Agr.), leading research fellow.

For citation: Golovin S. E., Glinushkin A. P., Zerkalov I. A., Beloshapkina O. O., Kopina M. B. Pathocomplex of Soil Micromycetes Associated with Root and Foot Rots of Strawberry in Some Regions of Russia. Dostizheniya nauki i tekhniki APK. 2019. Vol. 33. No. 7. Pp. 62–70 (in Russ.). DOI: 10.24411/0235-2451-2019-10715.