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Background <p>Invasive species are alien ones that are not a significant pest in their origin under the pressure of natural enemies; however, they cause economic damages by increasing their population in the introduced region. In areas newly introduced to invasive species, population growth leads to ecological imbalance and significant economic losses, particularly in agriculture and natural ecosystems. <i>Orosanga japonica</i>, Melichar, 1898) (Hemiptera: Ricaniidae) being one of invasive species, was introduced to the Black Sea Region of Türkiye from the neighbouring country Georgia in the early 2000s and became an agenda item as both an agricultural pest and an urban pest until 2020.</p> Results <p><i>Orosanga japonica</i> has been on the agenda in the Black Sea Region of Türkiye between 2010 and 2020, especially in July and August. However, despite public pressure, chemical control was not carried out against the pest, and cultural control methods were applied. In October 2019, <i>Beauveria bassiana</i>, an important entomopathogen fungus, was detected on nymphs and adults of <i>O. japonica</i> on leaves and shoots of kiwi plants in the Kemalpaşa district of the Artvin province. It spread throughout the region within three years of detection. It reduced the population of the pest and eliminated it as a concern for the region.</p> Conclusion <p><i>Orosanga japonica</i> was firstly recorded in Türkiye in 2009, and many research studies have been carried out on the pest with the increase in the pest’s spread and population. Almost all of these studies are related to biology, cultural, mechanical, and biological control of the pest in addition to chemical control. The most important reason for this is that tea is intensively cultivated in the Eastern Black Sea Region of Türkiye, where the pest is transmitted and spread. Chemical pesticides are not used on tea plantations; only chemical fertilizers are applied. In addition, the abundant rain and humidity of the region create suitable conditions for entomopathogens in biological control. In this review, the process of avoiding chemical control against this species, placing the pest under natural enemy pressure, and several suggestions for these processes are given. It is thought that this study, which includes some suggestions based on experience, can be an important model for the development of control strategies that should be applied against similar invasive pest species.</p>

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Current status of the invasive species, Orosanga Japonica (Melichar, 1898) (Hemiptera: Ricaniidae) under natural enemy pressure in Türkiye

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  • 发表日期：

    2026年2月6日

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  • Kibar Ak

摘要

Background

Invasive species are alien ones that are not a significant pest in their origin under the pressure of natural enemies; however, they cause economic damages by increasing their population in the introduced region. In areas newly introduced to invasive species, population growth leads to ecological imbalance and significant economic losses, particularly in agriculture and natural ecosystems. Orosanga japonica, Melichar, 1898) (Hemiptera: Ricaniidae) being one of invasive species, was introduced to the Black Sea Region of Türkiye from the neighbouring country Georgia in the early 2000s and became an agenda item as both an agricultural pest and an urban pest until 2020.

Results

Orosanga japonica has been on the agenda in the Black Sea Region of Türkiye between 2010 and 2020, especially in July and August. However, despite public pressure, chemical control was not carried out against the pest, and cultural control methods were applied. In October 2019, Beauveria bassiana, an important entomopathogen fungus, was detected on nymphs and adults of O. japonica on leaves and shoots of kiwi plants in the Kemalpaşa district of the Artvin province. It spread throughout the region within three years of detection. It reduced the population of the pest and eliminated it as a concern for the region.

Conclusion

Orosanga japonica was firstly recorded in Türkiye in 2009, and many research studies have been carried out on the pest with the increase in the pest’s spread and population. Almost all of these studies are related to biology, cultural, mechanical, and biological control of the pest in addition to chemical control. The most important reason for this is that tea is intensively cultivated in the Eastern Black Sea Region of Türkiye, where the pest is transmitted and spread. Chemical pesticides are not used on tea plantations; only chemical fertilizers are applied. In addition, the abundant rain and humidity of the region create suitable conditions for entomopathogens in biological control. In this review, the process of avoiding chemical control against this species, placing the pest under natural enemy pressure, and several suggestions for these processes are given. It is thought that this study, which includes some suggestions based on experience, can be an important model for the development of control strategies that should be applied against similar invasive pest species.