Survey for the occurrence of spiralling whitefly, Aleurodicus dispersus (Russell) under high density planting systems of guava in Karnataka, India

Abstract

Systematic surveys were conducted to document the incidence of spiralling whitefly, Alerodicus dispersus (Rssell) in seven districts of Karnataka viz., Bidar, Bagalkot, Gadag, Dharwad, Haveri, Chikkamangaluru and Bengaluru during 2017 and 2018. Spiralling whitefly incidence in all the districts was categorized as low, medium, high and very high. Incidence was very high (>75%) in Bidar and Bengaluru while Gadag showed high incidence (51-75%) during both the years of study. The incidence of spiralling whitefly was high in 2017 in Bengaluru and Bidar districts. The district which showed high level of incidence of spiralling whitefly in 2017 turned to medium level of infestation in 2018. Dharwad and Bagalkot districts showed medium level (26-50%) of infestation. Haveri and Chikkamagaluru
showed low level (1-25%) of infestation both the years.