Flying features of winged aphids on potato seed plants during 2004-2006
The most important problem of the introduction of advanced potatoes seed system is to protect against repeated infection the healthy potatoes by viruses in the open field. In our republic the greatest risk to re-infection the healthy potatoes seed is Y - potato virus. The principal vectors of Y – potato virus, developing the largest number, are three types of aphids - buckthorn (Aphis nasturtii), alder (Aphis frangulae) and bean (Aphis fabae). The bean aphid is dominant, in some years its size rises up to 2406 copies. Relatively low coefficient of harmfulness (0.1 equivalent unit), provided the mass settlement on the plants can significantly increase the contamination of potatoes seed. The climatic conditions of the growing season, precipitation, relative humidity, which significantly affect the development and dispersal of aphids on host plants are of great importance.