Özet:

Turkey is always the focus of interest among the countries with its very rich flora, which contains approximately 12,000 plant taxons, with a mild climate. The reasons for this wealth of plants can be: its ecological wealth/diversity, its bridge to the continents of Europe, Asia and Africa, and the crossroads of three different regions such as Europe-Siberia, the Mediterranean and Iran-Turan. This florist wealth of our country is very important in terms of biodiversity. However, a different reflection of this can be seen in the decrease in the productivity and quality of commercial crops, while some damage can also occur in structures where the need for irrigation and drainage is met. The main of these damages is the decline in the hydration and drainage capabilities and the failure to the expected output from the hydration and drainage. The main reason for this is that the water is foreign herbs. Water foreign herbs develop them by developing them in the basin, shape, banket and service routes of the channels. Foreign herbs in this area are divided into two kinds, as black foreign herbs and water foreign herbs. Water strangers are plants living in different depths of the water and/or wet areas. It can be classified in different forms; flowerless plants (Azolla filiculoides), flowered plants (Potamogeton spp.) and algae (Chara spp.). In water, foreign herbs are usually divided into 5 groups according to their development and land conditions. These are underwater plants (Ceratophyllum demersum, Potamogeton pectinatus), overwater plants (Phragmites australis, Typha spp.They are free floating plants (Lemna spp., Nymphaea alba, Eichhornia crassipes), underwater floating plants (Trapa natans, Nuphar lutea) and algae (Chara spp., Rhizoclonium spp.) Water plants are natural and beneficial beings of water areas. It should not be forgotten that these are useful insects, birds, some animals and birds are areas of nutrition, conservation and reproduction, that water corrects some properties, protects the coasts from erosion. However, there can be situations that need to be combated. In the struggle, primarily protective measures, mechanical, physical, chemical and biological struggle can be applied. When preparing the fighting program in this sense, it should be taken into account that the method is economical, high efficiency, its impact duration is long and does not harm the environment.One of the important issues here is the status of invasive water strangers in the flora of our country.With the European Mediterranean Plant Protection Organization (EPPO)'s various lists of plants, these are: Hydrocotyle ranunculoides; Ludwigia grandiflora, , Elodea nuttalii, Myriophyllum aquaticum, Myriophyllum heterophyllum, Salvinia molesta's various species are found in the flora of our country. Hydrilla verticillata, Polygonum perfoliatum, Egeria densa, Azolla filiculoides and Eichhornia crassipes are registered in our country’s flora, among them Polygonum perfoliatum and Eichhornia crassipes are in the EPPO’s A2 list. Water symbol (Eichhornia crassipes) is a threat to our country and the region: the rate of reproduction is high, the struggle is difficult to invade foreign plants.This kind of natural flora, found as a decorative plant in our country for the first time in 2010 was found in the Asi River in Hatay, the border area of Hakipaşa.This plant is a very important, potential danger for our country's water resources. It is believed that it can easily reach many regions of our country, including the Mediterranean and the GAP region, and it can spread quickly depending on the conditions, and in these areas it can be a very serious threat in both biodiversity and economics.

Anahtar Kelimeler: