Abstract:

Due to the absence of any environmental pressure on foreign herbs, their development and cultivation, they are settled in newly moved areas and reach the level that will cause epidemic in a short time. Their spreads are often not limited to agricultural areas, and they invade road boundaries, empty areas, canyons and waters. These plants, which threaten biodiversity in the areas they show, restrict agricultural production and pose a risk for human health, have entered the world’s interests, and a set of measures have been taken to limit their populations in the environments where they are, whether to prevent their entry into new areas. Depending on its superior characteristics and spread areas, invasive plants and fighting strategies must differ according to the indigenous species. In the areas where they first enter, chemical methods can be combated in areas that are suitable for physical, mechanical and herbicidal use. However, the use of these methods of fighting specified after spreading to broad areas with certain distances becomes impossible in terms of human power, cost and environmental safety. Therefore, the classic biological struggle in the management of invasive plants, which spread rapidly due to the absence of their natural enemies, generally appears to us as the only method that can be applied, effective, ecological, economic and sustainable in broad areas. Persicaria perfoliata is one of the world’s most important invaders of foreign herbs and is a single-year-old oxygen plant. It has been used for medical purposes in China for three centuries, and has rarely been harmful in terms of agriculture and ecology. In the 1930s, it moved from Japan to the United States, and as it was uncontrolled in the area in which it entered, it has already invaded a wide area covering 12 states. In the open areas, the plant can reach a length of up to 8 m by climbing to other plants on the woods, as it creates an intense habitus by fully covering the soil surface. When they reach high intensities, all the other plants are under pressure, eliminating biological diversity and becoming a dominant species. Although all the methods of fighting were done, biological fighting studies were launched in 1996 in partnership with China against this type that was uncontrolled. In this framework, surveys were carried out in China in 1996-2001 to identify the natural enemies of the invasive plant. Of the many species identified in the study, Rhinoncomimus latipes Korotyaev (Coleoptera: Curculionidae) is monofag and is identified as the most hopeful in biological struggle in terms of damage to the plant. As a result of the Customization and Effectiveness Tests made to the guest, the USDA decided to mass production and release of natural enemy. As a result of the release work, the plant was under significant pressure.

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