Danilova, T. A., Danilov, L. G., Sinitsyna, S. M. PROSPECTS OF THE USE OF THE ENTOMOPATHOGENIC NEMATODES AGAINST WIREWORMS ON POTATOES IN ORGANIC AGRICULTURE OF THE NORTHWEST REGION OF THE RUSSIAN FEDERATION // Proceedings of Petrozavodsk State University. 2018. No 8 (177). DOI: 10.15393/uchz.art.2018.244


General Biology

PROSPECTS OF THE USE OF THE ENTOMOPATHOGENIC NEMATODES AGAINST WIREWORMS ON POTATOES IN ORGANIC AGRICULTURE OF THE NORTHWEST REGION OF THE RUSSIAN FEDERATION

Keywords:
wireworms
potato
entomopathogenic nematodes
anthonem-F
nemabact
protonem
organic farming		 Summary: The results of tests of biological preparations made on the basis of entomopathogenic nematodes Enthonem-F, Nemabact and Protonem are presented as a means of protection of potatoes from larvae of click beetles - wireworms for the purposes of organic farming in the North-Western region of Russia, including the Republic of Karelia. Invasive larvae of the nematodes are microscopic worms adapted to long-term existence in the soil without food and compatible with many means of plant protection. The mechanism by which entomopathogenic nematodes are able to infect and reproduce in the host insect involves a mutual relationship between nematodes and their symbiotic bacteria. High virulence nematode-bacterial complexes against insect pests and safety for humans, warm-blooded animals, plants is the basis of using entomopathogenic nematodes as effective agents in the biological control wireworms, which are the most common pests on potatoes in the region. The use of nematode preparations in protection of potatoes from wireworms is undoubtedly of scientific and practical importance, as it creates real prerequisites for their use in organic farming, ensuring the production of high-quality environmentally safe products. Тhe results of field and production tests showed high biological efficiency of nematode biopreparations (from 69.3 to 100%) against wireworms on potatoes at a nematode rate of of 5 billion / ha of invasive larvae introduced in the soil when planting tubers or on the soil surface under the plants in the budding phase. At the same time, damage to tubers by wireworms is mainly noted to a weak degree. The new preparation Protonem created on the basis of nematodes of the species Steinernema feltiae protense is not inferior by efficiency to Nemabact and Enthonem-F and even with a decrease in the recommended rate of its consumption to 2.5 billion invasive larvae per hectare has a fairly high biological efficiency - 96.4 %.



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