Bio-rational management of whitefly (Bemisia tabaci) for suppressing tomato yellow leaf curl virus

Abstract

Whitefly (Bemisia tabaci) is the vector of tomato yellow leaf curl virus (TYLCV), is a serious pest of vegetables and other crops worldwide. The experiment was conducted at Bangladesh Agricultural Research institute (BARI) during two consecutive years of 2009 and 2010 to select a suitable bio-rational management practice against white fly, transmitting TYLCV. Treatments comprising tomato variety Ratan with diseased plant uprooting, spraying admire, applying admire on trap crop (marigold), spraying neem, sesame and mustard oil with trix and the untreated control were used in this experiment. The variety Opurba with similar materials as described above was used. Percent virus infected tomato plants ranged from 1.33 to 19.00 in two consecutive years, where the highest infection was recorded in control plot with variety Opurba and the lowest was recorded in variety Ratan treated with Admire. Consequently, the highest yield (47.70 and 52.36 t ha -1 in 1 st and 2 nd year, respectively) in the plots of variety Ratan treated with admire and the lowest yield was recorded in untreated control plots with variety Opurba (14.75 and 30.30 t ha -1 ) for the two consecutive years. A strong positive correlation was observed between whitefly population and % TYLCV infection for both the years and both varieties of tomato. While a negative correlation was observed between % TYLCV infection with number of fruits plants -1 and yield (t ha -1 ) for both the years and in both varieties of tomato. These results are consistent with the occurrences of TYLCV, which have been associated with the percent virus infection in relation to yield and yield contributing characters of tomato.

Tiny Flies: A Mighty Pest That Threatens Agricultural Productivity—A Case for Next-Generation Control Strategies of Whiteflies

“…Notably, the presence of TYLCV in the field is always associated with the presence of B. tabaci population across the world. There is a negative correlation between percent disease incidence and number of fruits per plant or total produce in a field [ 107 ]. The magnitude of economic losses caused by or attributed to whiteflies can also be judged from socio-economic impact assessments based on scientific efforts.…”

EFECTO DE INSECTICIDAS BIORRACIONALES Y NEONICOTINOIDES EN LAS POBLACIONES DE Bemisia tabaci Y RENDIMIENTO DE FRUTO EN TOMATE

“…Medias dentro de la misma columna seguidos por la misma letra no son significativamente diferentes (Bonferroni p > 0.05). ns: diferencia no significativa La integración de productos biorracionales en tratamientos de manejo de plagas ha sido propuesto como una alternativa viable para el manejo de B. tabaci en el cultivo de tomate (Reddy y Miller, 2014;Alam et al, 2016;Adel et al, 2018). Se considera que los insecticidas biorracionales presentan algunas ventajas, como menor toxicidad a humanos, mayor seguridad al medio y menor impacto a insectos benéficos (Yang et al, 2010).…”