Effects of sub‐lethal imidacloprid levels on potato leafroll virus transmission by Myzus persicae

Abstract

The effects of sub‐lethal imidacloprid concentrations on acquisition and inoculation of potato leafroll virus (PLRV) by Myzus persicae (Sulzer) (Hemiptera: Aphididae) were investigated. In experiments using two aphid clones to acquire PLRV from infected potatoes, virus transmission declined significantly with increasing concentrations of imidacloprid. The same was true in experiments using imidacloprid‐treated Physalis floridana Rydb. as acquisition sources. When viruliferous M. persicae were placed on uninfected, imidacloprid‐treated P. floridana, there were significant declines in PLRV transmission. Sub‐lethal concentrations of imidacloprid clearly inhibited both acquisition and inoculation of PLRV by M. persicae, either through poisoning, temporary intoxication, and/or antifeedant effects.

Effects of cycloxaprid, a novel cis‐nitromethylene neonicotinoid insecticide, on the feeding behaviour of Sitobion avenae

“…The calculation of sublethal effects was after the methods of Kerns and Gaylor22 and Mowry and Ophus 23. LC 10(24 h) and LC 15(24 h) were calculated.…”

Silício e imidacloprid na colonização de plantas por Myzus persicae e no desenvolvimento vegetativo de batata inglesa

“…A ausência de pulgões nas plantas, mesmo com a metade da dose do inseticida, pode ser devida ao efeito letal do imidacloprid (FOSTER et al, 2003) ou à sua ação como fagodeterrente, que afeta a movimentação e o comportamento alimentar de pulgões, particularmente em concentrações subletais (NAUEN, 1995;BOITEAU & OSBORN, 1997). Além do controle de M. persicae, a utilização de baixa dosagem de imidacloprid pode ser eficiente na prevenção de transmissão do PLRV (MOWRY & OPHUS, 2002;MOWRY, 2005).…”

Effects of Insecticides on Behavior of Adult Bactericera cockerelli (Hemiptera: Triozidae) and Transmission of Candidatus Liberibacter psyllaurous

“…L. psyllaurous 59 Ð 64% compared with the untreated controls. The use of imidacloprid was reportedly successful in preventing plant disease acquisition and inoculation by M. persicae and the leafhopper Macrosteles quadripunctulatus Kirschbaum (Mowry andOphus 2002, Saracco et al 2008). The effectiveness of imidacloprid on potato psyllid behaviors remains to be tested in the Þeld, but the recommendations for imidacloprid application at the time of planting (Goolsby et al 2007a, UC IPM Online 2008 suggests the strategy has proven useful.…”