A. V. Filippov, M. A. Kuznetsova, A. N. Rogozhin, V. N. Demidova, I. A. Denisenkov, N. V. Statsyuk
All-Russian Research Institute of Phytopathology, ul. Institut, vl. 5, r.p. Bol’shie Vyazemy, Odintsovskii r-n, Moskovskaya obl., 143050, Russian Federation
Abstract. Late blight remains one of the most devastating potato diseases for more than 150 years. To minimize yield losses, potato producers apply various protective measures including treatments of fields with fungicides. However, active use of fungicides may have a negative influence on the environment. Due to this fact, protection strategies, able to optimize the number of required fungicidal treatments depending on climatic conditions became popular in recent years. Based on the information about the late blight development on the experimental field of the All-Russian Research Institute of Phytopathology, collected during 30 seasons, the authors calculated AUDPC values characterizing the dynamics of disease development for all these seasons and then determined the corresponding potato losses caused by a premature death of above-ground parts of infected plants. Calculated yield losses were compared with weather conditions registered for the studied seasons. As a result of the analysis, the key meteorological parameters influencing the disease development were determined (the total frequency of 5-day periods favorable for the late blight development and the share of the frequency of such periods falling into the rapid plant growth stage in relation to the total frequency). Based on these parameters, a mathematical model was developed to calculate potato yield losses caused by the late blight. The model was successfully verified using independent experimental data on the late blight development on unprotected potato fields near Lelystad (Netherlands) and Munich (Germany) obtained within the framework of the research program of the international Euroblight consortium. Deviation of the yield loss values calculated using the model and weather data from the above-mentioned geographical points (9 fields) from the real values of yield losses did not exceed 10%; the average deviation was about 4.5%. The developed model can be used for mapping of potato-growing regions with their gradation according to the level of expected losses (high, medium, low).
Keywords: potato; mathematical model; late blight; yield losses; determination coefficient.
Author Details: A. V. Filippov, Cand. Sc. (Biol.), leading research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); M. A. Kuznetsova, Cand. Sc. (Biol.), head of division; A. N. Rogozhin, Cand. Sc. (Agr.), senior research fellow; V. N. Demidova, Cand. Sc. (Biol.), research fellow; I. A. Denisenkov, post graduate student; N. V. Statsyuk, Cand. Sc. (Biol.), senior research fellow.
For citation: Filippov A. V., Kuznetsova M. A., Rogozhin A. N., Demidova V. N. Denisenkov I. A., Statsyuk N. V. Key Biometeorological Factors for Estimating Potato Yield Losses Caused by Late Blight. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 3. Pp. 21-23 (in Russ.). DOI: 10.24411/0235-2451-2018-10304.