NDLI: Effectiveness of Combined Use of Mineral Oil and Insecticide Spray in Reducing Potato Virus Y (PVY) Spread under Field Conditions in New Brunswick, Canada

Content Provider	Springer Nature Link
Author	MacKenzie, Tyler D. B. Lavoie, Jacques Nie, Xianzhou Singh, Mathuresh
Copyright Year	2016
Abstract	In the 2014 and 2015 crop seasons, the efficacies of different types, rates and combinations of mineral oil and insecticide foliar sprays for reducing Potato virus Y (PVY) spread were tested in controlled field trials in New Brunswick (NB), Canada. Experimental plots were planted with certified PVY-free Goldrush, supplemented with known virus-infected seed to raise PVY inoculum to 2.3% and 3% at the beginning of the 2014 and 2015 seasons, respectively. Treatments consisted of mineral oil-only sprays at different application rates, insecticide-only sprays of differing numbers, and several combined mineral oil and insecticide spray regimes, all compared to a no-spray control treatment. PVY spread to 18% (2014) and 22% (2015) of initially virus-free plants in no-spray control plots, with significant reductions observed in PVY spread in several treatments. Greatest PVY reductions, as low as 4% (2014) and 12% (2015), were in combined mineral oil and insecticide spray treatments, followed by oil-only sprays; while insecticide-only sprays did not significantly reduce PVY spread. As well as measuring PVY spread to marked test plants and randomly collected post-harvest tuber sample from the plots, exhibited similar treatment pattern for PVY incidence. Multiple logistic regression modeling confirmed the relative efficacy of combined oil and insecticide sprays for reducing PVY spread, while accounting for variable inoculum and aphid factors. Modeling also highlighted the importance of planting low-PVY seed initially, and of early application of foliar sprays. Local best management practice recommendations for reduction of in-field PVY spread were discussed.En los ciclos de cultivo de 2014 y 2015, se probaron, en ensayos controlados de campo en New Brunswick, Canadá, las eficacias de diferentes tipos, dosis, y combinaciones de aceite mineral e insecticidas en aspersión foliar, para reducir la dispersión del virus Y de la papa (PVY). Los lotes experimentales se plantaron con semilla certificada libre de PVY, var. Goldrush, suplementada con semilla infectada de virus para aumentar el inóculo de PVY a 2.3% y 3% al principio de los ciclos de 2014 y 2015, respectivamente. Los tratamientos consistieron de aspersiones solamente con aceite mineral en diferentes dosis, o solamente de diferente número de insecticidas, y de varias combinaciones de regímenes de aspersiones de aceite mineral e insecticidas, todos comparados con un tratamiento testigo sin aspersiones. El PVY se dispersó al 18% (2014) y 22% (2015) de plantas inicialmente libres de virus en los lotes testigo sin aspersiones, con reducciones significativas observadas en la dispersión de PVY en varios tratamientos. Las reducciones mayores de PVY, de hasta 4% (2014) y 12% (2015), fueron en los tratamientos de aspersiones de combinaciones de aceite mineral e insecticida, seguidos de las hechas solamente con aceite, mientras que las de únicamente insecticida no redujeron significativamente la dispersión. Así como al medir la dispersión del PVY a plantas marcadas y colecta al azar de muestras de tubérculo en post-cosecha, se exhibieron patrones similares de tratamiento para la incidencia de PVY. Los modelos de regresión múltiple confirmaron la eficacia relativa de la aspersión con la combinación de aceite e insecticida para reducir la dispersión del PVY, mientras se contaba con los factores de las variables de inóculo y de áfidos. Al modelar, también resaltó la importancia de plantar inicialmente semilla baja en PVY, y de la aplicación temprana de aspersiones foliares. Se discutieron las mejores recomendaciones locales sobre prácticas de manejo para la reducción de la dispersión de PVY en el campo.
Starting Page	70
Ending Page	80
Page Count	11
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	94
Issue Number	1
e-ISSN	18749380
Language	English
Publisher	Springer US
Publisher Date	2016-12-23
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	PVY management PVY transmission Field trials Aphids PVY inoculum Plant Sciences Agriculture Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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