Increase in cucumber cropping capacity and resistance to downy mildew


S. Bondarenko, S. Stankevych*, L. Zhukova, M. Furdyha, V. Horiainova, O. Batova, S. Mykhailenko, M. Dzham, D. Gentosh, O. Bashta, O.V. Lazarieva, H. Balan, O. Romanov, T. Romanova, O. Bragin, I. Hordiienko and Yu. Ogurtsov

The authors have specified the regional list of Gherkin-type cucumber diseases. We established that the representative population of oomycetes (fungi-like organisms) occupies the dominant position in the pathocomplex of this vegetable crop when growing under open ground conditions: downy mildew or powdery mildew (Pseudoperonospora cubensis). We found that the share of additional net profit in the medium resistant group of samples (score 5), compared to the susceptible group (scores 1-3), increases by 2 times; in the resistant group (score 7) it increases by 2.6 to 4.2 times. We also registered that Gherkin-type cucumber growing samples susceptible to downy mildew of the immunological group (scores 1-3) under production conditions without additional use of a comprehensive system of crops protection against diseases is unprofitable or low-profitable (-9.4...44.6%); medium resistant (score 5)-medium profitable (91.2%); resistant (score 7)-profitable (from 113.9 to 165.9%).

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