Monitoring of the Citrus Blackfly in Brazil
Introduction Brazil is currently the world’s largest producer of citrus fruits, with over one million hectares planted. Most of Brazil’s orange production is destined for the juice industry. This production is basically concentrated in the state of São Paulo, which alone is responsible for 70% of the national orange production and 98% of the juice […]
Brazil, the world's largest producer of citrus fruits, faces a significant challenge with the spread of the citrus blackfly, a pest that threatens the country's thriving orange and juice industry. With over one million hectares of citrus planted, most of Brazil's orange production is directed towards the juice industry, and this concentration is primarily found in the state of São Paulo. São Paulo alone accounts for 70% of the national orange production and 98% of the juice production. The presence of pests like the citrus blackfly not only increases production costs but also poses a threat to the sustainability of the citrus farming industry in Brazil.
The citrus blackfly, scientifically known as Aleurocanthus woglumi Ashby, originated in Southwest Asia and has since spread to tropical and subtropical regions across Africa, the Americas, Asia, and Oceania. In Europe, only the species A. spiniferus is found in restricted areas of Italy and Greece, where it is under official control. In contrast, Brazil has experienced a more significant impact from the citrus blackfly, with its first recorded presence in the state of Pará in 2001. The pest's spread to other states was facilitated by the transportation of orange fruits to concentrated juice industries in various consumer markets.
Initially considered a quarantine pest in Brazil until 2007, the citrus blackfly was under control due to its limited dissemination in the country. However, its wide spread in recent years has led to its classification as an A-2 quarantine pest, which no longer requires strict quarantine measures. Despite this, the pest remains a significant threat to Brazilian citrus farming, necessitating rigorous phytosanitary measures for its control.
The citrus blackfly primarily infests citrus plants but can also be found on more than 300 different plant species, both cultivated and wild. Infestations have been observed in avocado, cashew, grapevine, and guava, among others. The main mode of dispersal for the blackfly occurs through the use of infested seedlings or ornamental plants transported by humans. Additionally, natural dispersal can happen through infested leaves carried by the wind or due to the population growth of the pest. Female blackflies lay their eggs on the underside of leaves in a spiral pattern, which can lead to significant damage to the plants.
The citrus blackfly's impact on Brazil's citrus industry is a cause for concern, as it not only increases production costs but also threatens the long-term viability of the sector. The pest's ability to infest a wide range of plant species further exacerbates the challenge, making it a formidable adversary for Brazilian farmers. As the citrus blackfly continues to spread across the country, the need for effective monitoring and control strategies becomes increasingly urgent. The Brazilian agricultural community must remain vigilant and implement robust phytosanitary measures to safeguard the country's citrus production and maintain its position as a global leader in the industry.
