Here in Central Virginia this year we rotated Calypso with Carbaryl as populations settled in to our blocks. It worked great.
On Fri, Nov 22, 2013 at 1:10 PM, David Kollas <kol...@sbcglobal.net> wrote: > This past season I had continued re-infestation of potato > leafhopper in young unbudded apple rootstock nursery. Calypso provided > control, but only until the next population floated in on air currents, > presumably from somewhere far south of here (Connecticut). My question is: > Are these migrant populations subject to resistance development in the same > way that local resident insect populations are? > Evidently they are not resistant when they arrive, but to remain > within label limits of product per season, other neonicotinoid products > might be used to provide continued control. Is anyone aware of resistance > having developed in this pest to neonicotinoids or other pesticides where > the pest does not survive to pass on its resistance to the next generation? > Does potato leafhopper migrate within, say, New England states, or > within other Northern apple-growing regions during a growing season? If > so, resistance might become a problem regardless of the pest's > overwintering ability. > > David Kollas > Kollas Orchard, CT > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop >
_______________________________________________ apple-crop mailing list apple-crop@virtualorchard.net http://virtualorchard.net/mailman/listinfo/apple-crop
